def get_fieldsets(self, request, obj=None):
fieldsets = copy.deepcopy(super(FeatureAdmin, self).get_fieldsets(request, obj))
if not obj:
return fieldsets
else:
fieldsets[0][1]['fields'].insert(2, calcGeometryField(obj.shapefile.geom_type))
return fieldsets
def editFeature(request, shapefile_id, feature_id=None):
""" Let the user add or edit a feature within the given shapefile.
'feature_id' will be None if we are adding a new feature.
"""
shapefile = Shapefile.objects.get(id=shapefile_id)
if request.method == "POST" and "delete" in request.POST:
# User clicked on the "Delete" button -> show "Delete Feature" page.
return HttpResponseRedirect("/shape-editor/deleteFeature/" +
shapefile_id + "/" + feature_id)
geometryField = utils.calcGeometryField(shapefile.geom_type)
formType = shapefileEditor.getMapForm(shapefile)
if feature_id == None:
# Adding a new feature.
feature = Feature(shapefile=shapefile)
attributes = []
else:
# Editing an existing feature.
feature = Feature.objects.get(id=feature_id)
# Get the attributes for this feature.
attributes = [] # List of (name, value) tuples.
for attrValue in feature.attributevalue_set.all():
attributes.append([attrValue.attribute.name,
attrValue.value])
attributes.sort()
# Display the form.
if request.method == "GET":
wkt = getattr(feature, geometryField)
form = formType({'geometry' : wkt})
return render_to_response("editFeature.html",
{'shapefile' : shapefile,
'form' : form,
'attributes' : attributes})
elif request.method == "POST":
form = formType(request.POST)
try:
if form.is_valid():
wkt = form.cleaned_data['geometry']
setattr(feature, geometryField, wkt)
feature.save()
# Return the user to the "select feature" page.
return HttpResponseRedirect("/shape-editor/edit/" +
shapefile_id)
except ValueError:
pass
return render_to_response("editFeature.html",
{'shapefile' : shapefile,
'form' : form,
'attributes' : attributes})
def get_fieldsets(self, request, obj=None):
fieldsets = copy.deepcopy(
super(FeatureAdmin, self).get_fieldsets(request, obj))
if not obj:
return fieldsets
else:
fieldsets[0][1]['fields'].insert(
2, calcGeometryField(obj.shapefile.geom_type))
return fieldsets
def editFeature(request, shapefile_id, feature_id=None):
if request.method == "POST" and "delete" in request.POST:
return HttpResponseRedirect("/shape-editor/deleteFeature/" +
shapefile_id + "/" + feature_id)
try:
shapefile = Shapefile.objects.get(id=shapefile_id)
except:
raise Http404
if feature_id == None:
feature = Feature(shapefile=shapefile)
else:
try:
feature = Feature.objects.get(id=feature_id)
except Feature.DoesNotExist:
raise Http404
attributes = []
for attrValue in feature.attributevalue_set.all():
attributes.append([attrValue.attribute.name, attrValue.value])
attributes.sort()
geometryField = utils.calcGeometryField(shapefile.geom_type)
formType = utils.getMapForm(shapefile)
if request.method == "GET":
wkt = getattr(feature, geometryField)
form = formType({'geometry': wkt})
return render_to_response("editFeature.html", {
'shapefile': shapefile,
'form': form,
'attributes': attributes
})
elif request.method == "POST":
form = formType(request.POST)
try:
if form.is_valid():
wkt = form.cleaned_data['geometry']
setattr(feature, geometryField, wkt)
feature.save()
return HttpResponseRedirect("/shape-editor/edit/" +
str(shapefile.id))
except ValueError:
pass
return render_to_response("editFeature.html", {
'shapefile': shapefile,
'form': form,
'attributes': attributes
})
def exportData(shapefile):
dstDir = tempfile.mkdtemp()
dstFile = str(os.path.join(dstDir, shapefile.filename))
dstSpatialRef = osr.SpatialReference()
dstSpatialRef.ImportFromWkt(shapefile.srs_wkt)
driver = ogr.GetDriverByName("ESRI Shapefile")
datasource = driver.CreateDataSource(dstFile)
layer = datasource.CreateLayer(str(shapefile.filename),
dstSpatialRef)
for attr in shapefile.attribute_set.all():
field = ogr.FieldDefn(str(attr.name), attr.type)
field.SetWidth(attr.width)
field.SetPrecision(attr.precision)
layer.CreateField(field)
srcSpatialRef = osr.SpatialReference()
srcSpatialRef.ImportFromEPSG(4326)
coordTransform = osr.CoordinateTransformation(srcSpatialRef,
dstSpatialRef)
geomField = utils.calcGeometryField(shapefile.geom_type)
for feature in shapefile.feature_set.all():
geometry = getattr(feature, geomField)
geometry = utils.unwrapGEOSGeometry(geometry)
dstGeometry = ogr.CreateGeometryFromWkt(geometry.wkt)
dstGeometry.Transform(coordTransform)
dstFeature = ogr.Feature(layer.GetLayerDefn())
dstFeature.SetGeometry(dstGeometry)
for attrValue in feature.attributevalue_set.all():
utils.setOGRFeatureAttribute(
attrValue.attribute,
attrValue.value,
dstFeature,
shapefile.encoding)
layer.CreateFeature(dstFeature)
dstFeature.Destroy()
datasource.Destroy()
temp = tempfile.TemporaryFile()
zip = zipfile.ZipFile(temp, 'w', zipfile.ZIP_DEFLATED)
shapefileBase = os.path.splitext(dstFile)[0]
shapefileName = os.path.splitext(shapefile.filename)[0]
for fName in os.listdir(dstDir):
zip.write(os.path.join(dstDir, fName), fName)
zip.close()
shutil.rmtree(dstDir)
f = FileWrapper(temp)
response = HttpResponse(f, content_type="application/zip")
response['Content-Disposition'] = \
"attachment; filename=" + shapefileName + ".zip"
response['Content-Length'] = temp.tell()
temp.seek(0)
return response
def editFeature (request, shapefile_id, feature_id=None) :
if request.method == "POST" and "delete" in request.POST:
return HttpResponseRedirect ("/shape-editor/deleteFeature/" + shapefile_id + "/" + feature_id)
try:
shapefile = Shapefile.objects.get (id = shapefile_id)
except:
raise Http404
if feature_id == None:
feature = Feature (shapefile=shapefile)
else:
try:
feature = Feature.objects.get (id = feature_id)
except Feature.DoesNotExist:
raise Http404
attributes = []
for attrValue in feature.attributevalue_set.all ():
attributes.append ( [attrValue.attribute.name, attrValue.value] )
attributes.sort ()
geometryField = utils.calcGeometryField ( shapefile.geom_type )
formType = utils.getMapForm (shapefile)
if request.method == "GET":
wkt = getattr ( feature, geometryField)
form = formType ( { 'geometry' : wkt } )
return render_to_response ( "editFeature.html", { 'shapefile' : shapefile,
'form' : form ,
'attributes': attributes } )
elif request.method == "POST":
form = formType (request.POST)
try:
if form.is_valid():
wkt = form.cleaned_data ['geometry']
setattr (feature, geometryField, wkt)
feature.save ()
return HttpResponseRedirect ("/shape-editor/edit/" + str (shapefile.id))
except ValueError:
pass
return render_to_response ("editFeature.html",
{ 'shapefile' : shapefile,
'form' : form,
'attributes': attributes
} )
def exportData(shapefile):
dstDir = tempfile.mkdtemp()
dstFile = str(os.path.join(dstDir, shapefile.filename))
dstSpatialRef = osr.SpatialReference()
dstSpatialRef.ImportFromWkt(shapefile.srs_wkt)
driver = ogr.GetDriverByName("ESRI Shapefile")
datasource = driver.CreateDataSource(dstFile)
layer = datasource.CreateLayer(str(shapefile.filename), dstSpatialRef)
for attr in shapefile.attribute_set.all():
field = ogr.FieldDefn(str(attr.name), attr.type)
field.SetWidth(attr.width)
field.SetPrecision(attr.precision)
layer.CreateField(field)
srcSpatialRef = osr.SpatialReference()
srcSpatialRef.ImportFromEPSG(4326)
coordTransform = osr.CoordinateTransformation(srcSpatialRef, dstSpatialRef)
geomField = utils.calcGeometryField(shapefile.geom_type)
for feature in shapefile.feature_set.all():
geometry = getattr(feature, geomField)
geometry = utils.unwrapGEOSGeometry(geometry)
dstGeometry = ogr.CreateGeometryFromWkt(geometry.wkt)
dstGeometry.Transform(coordTransform)
dstFeature = ogr.Feature(layer.GetLayerDefn())
dstFeature.SetGeometry(dstGeometry)
for attrValue in feature.attributevalue_set.all():
utils.setOGRFeatureAttribute(attrValue.attribute, attrValue.value,
dstFeature, shapefile.encoding)
layer.CreateFeature(dstFeature)
dstFeature.Destroy()
datasource.Destroy()
temp = tempfile.TemporaryFile()
zip = zipfile.ZipFile(temp, 'w', zipfile.ZIP_DEFLATED)
shapefileBase = os.path.splitext(dstFile)[0]
shapefileName = os.path.splitext(shapefile.filename)[0]
for fName in os.listdir(dstDir):
zip.write(os.path.join(dstDir, fName), fName)
zip.close()
shutil.rmtree(dstDir)
f = FileWrapper(temp)
response = HttpResponse(f, content_type="application/zip")
response['Content-Disposition'] = \
"attachment; filename=" + shapefileName + ".zip"
response['Content-Length'] = temp.tell()
temp.seek(0)
return response
def getMapForm(shapefile):
""" Return a form.Form subclass for editing the given shapefile's features.
The form will have a single field, 'geometry', which lets the user edit
the feature's geometry.
"""
# Setup a dummy admin instance to auto-generate our map widget.
geometryField = utils.calcGeometryField(shapefile.geom_type)
geometryType = utils.calcGeometryFieldType(shapefile.geom_type)
if geometryType == "Point":
adminType = PointAdmin
elif geometryType == "LineString":
adminType = LineStringAdmin
elif geometryType == "Polygon":
adminType = PolygonAdmin
elif geometryType == "MultiPoint":
adminType = MultiPointAdmin
elif geometryType == "MultiLineString":
adminType = MultiLineStringAdmin
elif geometryType == "MultiPolygon":
adminType = MultiPolygonAdmin
elif geometryType == "GeometryCollection":
adminType = GeometryCollectionAdmin
adminInstance = adminType(Feature, admin.site)
field = Feature._meta.get_field(geometryField)
widgetType = adminInstance.get_map_widget(field)
# Define a form which encapsulates the desired editing field.
class MapForm(forms.Form):
geometry = forms.CharField(widget=widgetType(),
label="")
return MapForm
def importData(file, characterEncoding, format, user, folder):
start_time = time.time()
try:
#manage zipfile
fd, fname = tempfile.mkstemp(suffix=fileExt_dic[format])
os.close(fd)
f = open(fname, "wb")
for chunk in file.chunks():
f.write(chunk)
f.close()
if not zipfile.is_zipfile(fname):
os.remove(fname)
return "Not a valid zip archive.", None
zip = zipfile.ZipFile(fname)
hasSuffix = {}
required_suffixes = suffixes_dic[format]
for suffix in required_suffixes:
hasSuffix[suffix] = False
for info in zip.infolist():
extension = os.path.splitext(info.filename)[1].lower()
if extension in required_suffixes:
hasSuffix[extension] = True
for suffix in required_suffixes:
if not hasSuffix[suffix]:
zip.close()
os.remove(fname)
return "Archive missing required %s file." % suffix, None
zip = zipfile.ZipFile(fname)
dirname = tempfile.mkdtemp()
for info in zip.infolist():
if info.filename.endswith(filenameExt_dic[format]):
filename = info.filename
dstFile = os.path.join(dirname, info.filename)
f = open(dstFile, "wb")
f.write(zip.read(info.filename))
f.close()
zip.close()
#verify if vectorfile is valid
ds = DataSource(os.path.join(dirname, filename),
encoding=characterEncoding)
for srcLayer in ds:
layer = Shapefile.objects.create(name=srcLayer.name,
parent=folder,
srs_wkt=srcLayer.srs,
geom_type=srcLayer.geom_type.name,
encoding=characterEncoding,
created_by=user)
#define layer's attributes
attributes = []
for idx in range(srcLayer.num_fields):
attr = Attribute(shapefile=layer,
name=srcLayer.fields[idx],
type=srcLayer.field_types[idx].__name__,
width=srcLayer.field_widths[idx],
precision=srcLayer.field_precisions[idx])
attributes.append(attr)
Attribute.objects.bulk_create(attributes)
#store layer's features
srcSpatialRef = SpatialReference(srcLayer.srs.wkt)
dstSpatialRef = SpatialReference('EPSG:3857')
ct = CoordTransform(srcSpatialRef, dstSpatialRef)
features = []
for srcFeature in srcLayer:
srcGeometry = srcFeature.geom
srcGeometry.transform(ct)
srcGeometry = srcGeometry.geos
## if srcGeometry.coord_dim > 2:
## srcGeometry = srcGeometry.flatten2D()
srcGeometry = utils.wrapGEOSGeometry(srcGeometry)
#Store layer"s attributes
hash_attributeValue = {}
attribute_value = {}
attributes.sort(key=lambda x: x.name.lower())
for attr in attributes:
try:
value = srcFeature.get(attr.name)
except DjangoUnicodeDecodeError:
return "Wrong character encoding", None
if type(value) == datetime.date:
value = value.isoformat()
hash_attributeValue[attr.name] = value
feature = Feature(shapefile=layer,
attribute_value=hash_attributeValue,
id_relat=srcFeature.fid)
setattr(feature, utils.calcGeometryField(srcLayer.geom_type),
srcGeometry)
features.append(feature)
Feature.objects.bulk_create(features)
print("Temps final: --- %s seconds ---" %
str(time.time() - start_time))
return None, layer
except Exception, e:
return e, None
def exportMergedData(layers, encoding, EPSG, format):
start_time = time.time()
try:
dstSpatialRef = osr.SpatialReference()
dstSpatialRef.ImportFromEPSG(EPSG)
driver = ogr.GetDriverByName(ogrDriver_dic[format])
layer_name = '_'.join([layer.name for layer in layers]) + "_merged"
attributes = [
attribute for layer in layers
for attribute in layer.attribute_set.all()
]
features = tuple([
(feature, layer.geom_type) for layer in layers
for feature in layer.feature_set.all().order_by('id_relat')
])
if format == "shp":
if len({g for f, g in features}) != 1:
return "Shapefile format does not support different geometry types in the same layer", None
dstDir = tempfile.mkdtemp()
dstFile = str(
os.path.join(dstDir, layer_name + filenameExt_dic[format]))
datasource = driver.CreateDataSource(dstFile)
vlayer = datasource.CreateLayer(str(layer.name), dstSpatialRef)
#retrive attributes
for attr in attributes:
field = ogr.FieldDefn(str(attr.name), attr.type)
field.SetWidth(attr.width)
field.SetPrecision(attr.precision)
fields.append(field)
vlayer.CreateField(field)
#save features in shapefile
srcSpatialRef = osr.SpatialReference()
srcSpatialRef.ImportFromEPSG(3857)
coordTransform = osr.CoordinateTransformation(srcSpatialRef,
dstSpatialRef)
for feature, geom_type in features:
geometry = getattr(feature, utils.calcGeometryField(geom_type))
if geometry:
geometry = utils.unwrapGEOSGeometry(geometry)
dstGeometry = ogr.CreateGeometryFromWkt(geometry.wkt)
dstGeometry.Transform(coordTransform)
else:
dstGeometry = None
#save attributes in the shapefile
dstFeature = ogr.Feature(vlayer.GetLayerDefn())
dstFeature.SetGeometry(dstGeometry)
for attrName, attrValue in feature.attribute_value.iteritems():
attribute = Attribute.objects.get(name=str(attrName),
shapefile=feature.shapefile)
utils.setOGRFeatureAttribute(attribute, attrValue, dstFeature,
encoding)
vlayer.CreateFeature(dstFeature)
dstFeature.Destroy()
datasource.Destroy()
#compress the shapefile
temp = tempfile.TemporaryFile()
zip = zipfile.ZipFile(temp, 'w', zipfile.ZIP_DEFLATED)
shapefileBase = os.path.splitext(dstFile)[0]
shapefileName = os.path.splitext(layer_name)[0]
for fName in os.listdir(dstDir):
zip.write(os.path.join(dstDir, fName), fName)
zip.close()
#delete temporary files
shutil.rmtree(dstDir)
#return the zip to user
f = FileWrapper(temp)
response = StreamingHttpResponse(f, content_type="application/zip")
response[
'Content-Disposition'] = "attachment; filename=" + shapefileName + fileExt_dic[
format]
response['Content-Length'] = temp.tell()
temp.seek(0)
print("Temps final: --- %s seconds ---" %
str(time.time() - start_time))
return None, response
except BaseException, e:
return e, None
def importData(file, characterEncoding, format, user, folder):
start_time = time.time()
try:
#manage zipfile
fd,fname = tempfile.mkstemp(suffix=fileExt_dic[format])
os.close(fd)
f = open(fname, "wb")
for chunk in file.chunks():
f.write(chunk)
f.close()
if not zipfile.is_zipfile(fname):
os.remove(fname)
return "Not a valid zip archive.", None
zip = zipfile.ZipFile(fname)
hasSuffix = {}
required_suffixes = suffixes_dic[format]
for suffix in required_suffixes:
hasSuffix[suffix] = False
for info in zip.infolist():
extension = os.path.splitext(info.filename)[1].lower()
if extension in required_suffixes:
hasSuffix[extension] = True
for suffix in required_suffixes:
if not hasSuffix[suffix]:
zip.close()
os.remove(fname)
return "Archive missing required %s file." % suffix, None
zip = zipfile.ZipFile(fname)
dirname = tempfile.mkdtemp()
for info in zip.infolist():
if info.filename.endswith(filenameExt_dic[format]):
filename = info.filename
dstFile = os.path.join(dirname, info.filename)
f = open(dstFile, "wb")
f.write(zip.read(info.filename))
f.close()
zip.close()
#verify if vectorfile is valid
ds = DataSource(os.path.join(dirname,filename), encoding=characterEncoding)
for srcLayer in ds:
layer = Shapefile.objects.create(name=srcLayer.name, parent=folder, srs_wkt=srcLayer.srs, geom_type=srcLayer.geom_type.name, encoding=characterEncoding, created_by=user)
#define layer's attributes
attributes = []
for idx in range(srcLayer.num_fields):
attr = Attribute(shapefile=layer, name=srcLayer.fields[idx], type=srcLayer.field_types[idx].__name__, width=srcLayer.field_widths[idx], precision=srcLayer.field_precisions[idx])
attributes.append(attr)
Attribute.objects.bulk_create(attributes)
#store layer's features
srcSpatialRef = SpatialReference(srcLayer.srs.wkt)
dstSpatialRef = SpatialReference('EPSG:3857')
ct = CoordTransform(srcSpatialRef,dstSpatialRef)
features = []
for srcFeature in srcLayer :
srcGeometry = srcFeature.geom
srcGeometry.transform(ct)
srcGeometry = srcGeometry.geos
## if srcGeometry.coord_dim > 2:
## srcGeometry = srcGeometry.flatten2D()
srcGeometry = utils.wrapGEOSGeometry(srcGeometry)
#Store layer"s attributes
hash_attributeValue = {}
attribute_value = {}
attributes.sort(key=lambda x:x.name.lower())
for attr in attributes:
try:
value = srcFeature.get(attr.name)
except DjangoUnicodeDecodeError:
return "Wrong character encoding", None
if type(value) == datetime.date:
value = value.isoformat()
hash_attributeValue[attr.name] = value
feature = Feature(shapefile=layer, attribute_value=hash_attributeValue, id_relat=srcFeature.fid)
setattr(feature, utils.calcGeometryField(srcLayer.geom_type), srcGeometry)
features.append(feature)
Feature.objects.bulk_create(features)
print("Temps final: --- %s seconds ---" % str(time.time() - start_time))
return None, layer
except Exception, e:
return e, None
def exportMergedData(layers, encoding, EPSG, format):
start_time = time.time()
try:
dstSpatialRef = osr.SpatialReference()
dstSpatialRef.ImportFromEPSG(EPSG)
driver = ogr.GetDriverByName(ogrDriver_dic[format])
layer_name = '_'.join([layer.name for layer in layers])+"_merged"
attributes = [attribute for layer in layers for attribute in layer.attribute_set.all()]
features = tuple([(feature, layer.geom_type) for layer in layers for feature in layer.feature_set.all().order_by('id_relat')])
if format == "shp":
if len({g for f, g in features}) != 1:
return "Shapefile format does not support different geometry types in the same layer", None
dstDir = tempfile.mkdtemp()
dstFile = str(os.path.join(dstDir, layer_name+filenameExt_dic[format]))
datasource = driver.CreateDataSource(dstFile)
vlayer = datasource.CreateLayer(str(layer.name),dstSpatialRef)
#retrive attributes
for attr in attributes:
field = ogr.FieldDefn(str(attr.name), attr.type)
field.SetWidth(attr.width)
field.SetPrecision(attr.precision)
fields.append(field)
vlayer.CreateField(field)
#save features in shapefile
srcSpatialRef = osr.SpatialReference()
srcSpatialRef.ImportFromEPSG(3857)
coordTransform = osr.CoordinateTransformation(srcSpatialRef, dstSpatialRef)
for feature, geom_type in features:
geometry = getattr(feature, utils.calcGeometryField(geom_type))
if geometry:
geometry = utils.unwrapGEOSGeometry(geometry)
dstGeometry = ogr.CreateGeometryFromWkt(geometry.wkt)
dstGeometry.Transform(coordTransform)
else:
dstGeometry = None
#save attributes in the shapefile
dstFeature = ogr.Feature(vlayer.GetLayerDefn())
dstFeature.SetGeometry(dstGeometry)
for attrName, attrValue in feature.attribute_value.iteritems():
attribute = Attribute.objects.get(name=str(attrName), shapefile=feature.shapefile)
utils.setOGRFeatureAttribute(attribute, attrValue, dstFeature, encoding)
vlayer.CreateFeature(dstFeature)
dstFeature.Destroy()
datasource.Destroy()
#compress the shapefile
temp = tempfile.TemporaryFile()
zip = zipfile.ZipFile(temp, 'w', zipfile.ZIP_DEFLATED)
shapefileBase = os.path.splitext(dstFile)[0]
shapefileName = os.path.splitext(layer_name)[0]
for fName in os.listdir(dstDir):
zip.write(os.path.join(dstDir, fName), fName)
zip.close()
#delete temporary files
shutil.rmtree(dstDir)
#return the zip to user
f = FileWrapper(temp)
response = StreamingHttpResponse(f, content_type="application/zip")
response['Content-Disposition'] = "attachment; filename=" + shapefileName + fileExt_dic[format]
response['Content-Length'] = temp.tell()
temp.seek(0)
print("Temps final: --- %s seconds ---" % str(time.time() - start_time))
return None, response
except BaseException, e:
return e, None
def xml_map_config(request, zoom, x, y, basqui_map, layersMapOptions):
basqui_map.changed = False
basqui_map.save()
map = mapnik.Map(
TILE_WIDTH, TILE_HEIGHT,
"+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +no_defs +over"
)
for layer in layersMapOptions.all():
try:
layerLabel = LayerLabel.objects.get(layerMapOptions=layer)
except ObjectDoesNotExist:
layerLabel = None
for layerStyle in layer.styles.all():
shapefile = layer.layer
geometryField = utils.calcGeometryField(shapefile.geom_type)
if layerLabel:
query = '(select ' + geometryField + ', attribute_value->\'' + layerLabel.field.name + '\' as label, id_relat from "shapefile_feature" where' + ' shapefile_id in (' + str(
shapefile.id) + ')) as geom'
else:
query = '(select ' + geometryField + ', id_relat from "shapefile_feature" where' + ' shapefile_id in (' + str(
shapefile.id) + ')) as geom'
datasource = mapnik.PostGIS(user=dbSettings['USER'],
password=dbSettings['PASSWORD'],
dbname=dbSettings['NAME'],
port=5433,
table=query,
srid=3857,
geometry_field=geometryField,
geometry_table='"shapefile_feature"')
featureLayer = mapnik.Layer(
str(shapefile.filename) + str(layerStyle.id))
featureLayer.srs = "+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +no_defs +over"
featureLayer.datasource = datasource
featureLayer.styles.append(
str(shapefile.filename) + '_Style' + str(layerStyle.id))
#defining the feature layer styles
style_rule = mapnik.Rule()
if shapefile.geom_type in ["Point", "MultiPoint"]:
s = mapnik.PointSymbolizer(
mapnik.PathExpression(str(layerStyle.iconName)))
s.allow_overlap = True
style_rule.symbols.append(s)
elif shapefile.geom_type in ["LineString", "MultiLineString"]:
style_rule.symbols.append(
mapnik.LineSymbolizer(
mapnik.Color(str(layerStyle.strokeColor)),
layerStyle.strokeWeight))
elif shapefile.geom_type in ["Polygon", "MultiPolygon"]:
p = mapnik.PolygonSymbolizer(
mapnik.Color(str((layerStyle.fillColor))))
p.fill_opacity = layerStyle.fillOpacity
style_rule.symbols.append(p)
style_rule.symbols.append(
mapnik.LineSymbolizer(
mapnik.Color(str(layerStyle.strokeColor)),
layerStyle.strokeWeight))
layer_style = mapnik.Style()
layer_style.rules.append(style_rule)
#defining label styles
if layerLabel:
label_rule = mapnik.Rule()
label = mapnik.TextSymbolizer(
mapnik.Expression('[label]'), 'DejaVu Sans Book',
layerLabel.font_size,
mapnik.Color(str(layerLabel.font_color)))
label.halo_fill = mapnik.Color(str(layerLabel.halo_color))
label.halo_radius = int(layerLabel.halo_radius)
#label.label_placement = mapnik.label_placement.INTERIOR_PLACEMENT
label.allow_overlap = False
label.avoid_edges = True
label_rule.symbols.append(label)
label_style = mapnik.Style()
label_style.rules.append(label_rule)
featureLayer.styles.append(
str(shapefile.filename) + '_label' + str(layerStyle.id))
#add label to the map
map.append_style(
str(shapefile.filename) + '_label' + str(layerStyle.id),
label_style)
#add new feature to the map
map.append_style(
str(shapefile.filename) + '_Style' + str(layerStyle.id),
layer_style)
map.layers.append(featureLayer)
#saving the map mapnik xml
mapnik.save_map(
map, "c:\\basqui\\tilestache\\%s\\%s.xml" %
(str(request.user), str(basqui_map.map_name)))
def exportData (shapefile):
dstDir = tempfile.mkdtemp ()
dstFile = str ( os.path.join (dstDir, shapefile.filename) )
dstSpatialRef = osr.SpatialReference ()
dstSpatialRef.ImportFromWkt ( shapefile.srs_wkd)
driver = ogr.GetDriverByName ( "ESRI Shapefile")
datasource = driver.CreateDataSource ( dstFile )
layer = datasource.CreateLayer ( str ( shapefile.filename ), dstSpatialRef )
# find the spatial reference
srcSpatialRef = osr.SpatialReference ()
srcSpatialRef.ImportFromEPSG ( 4326 )
coordTransform = osr.CoordinateTransformation ( srcSpatialRef , dstSpatialRef)
geomField = utils.calcGeometryField ( shapefile.geom_type )
# Define layer attributes
for attr in shapefile.attribute_set.all ():
field = ogr.FieldDefn ( str ( attr.name ) , attr.type )
field.SetWidth ( attr.width )
field.SetPrecision ( attr.precision )
layer.CreateField ( field )
# Add all the (Single type) geometries for this layer
for feature in shapefile.feature_set.all ():
# Geometry is a django construct inherited from GeometryField
geometry = getattr ( feature , geomField )
geometry = utils.unwrapGEOSGeometry (geometry)
dstGeometry = ogr.CreateGeometryFromWkt ( geometry.wkt )
dstGeometry.Transform ( coordTransform )
dstFeature = ogr.Feature ( layer.GetLayerDefn () )
dstFeature.SetGeometry ( dstGeometry )
# add in the feature's attributes
for attrValue in feature.attributevalue_set.all ():
utils.setOGRFeatureAttribute ( attrValue.attribute ,
attrValue.value,
dstFeature,
shapefile.encoding)
layer.CreateFeature ( dstFeature )
dstFeature.Destroy ()
datasource.Destroy ()
# Compress the shapefile
temp = tempfile.TemporaryFile ()
zipHandle = zipfile.ZipFile ( temp, 'w' , zipfile.ZIP_DEFLATED )
for fName in os.listdir ( dstDir ):
zipHandle.write ( os.path.join ( dstDir , fName ) , fName )
zipHandle.close ()
# useful links to temp's directory
# shapefileBase = os.path.splitext ( dstFile) [0]
shapefileName = os.path.splitext ( shapefile.filename)[0]
# Delete the temporary files
shutil.rmtree ( dstDir )
# Return the zip archive to the user
f= FileWrapper ( temp )
response = HttpResponse ( f , content_type="application\zip")
response ['Content-Disposition'] = \
"attachment; filename=" + shapefileName + ".zip"
response ['Content-Length'] = temp.tell ()
temp.seek (0)
return response
def tile (request, version, shapefile_id, zoom, x, y):
shapefile = None
try:
if version != "1.0":
raise Http404
try:
shapefile = Shapefile.objects.get (id=shapefile_id)
except Shapefile.DoesNotExist:
raise Http404
zoom = int (zoom)
x = int (x)
y = int (y)
# min(x) = 0, max (x) =
if zoom < 0 or zoom > MAX_ZOOM_LEVEL:
raise Http404
# for TILE_WIDTH/HEIGHT==256
# at zoom = 0 extents will be 180 units/degrees
xExtent = _unitsPerPixel (zoom) * TILE_WIDTH
yExtent = _unitsPerPixel (zoom) * TILE_HEIGHT
minLong = xExtent * x - 180.0
minLat = yExtent * y - 90.0
maxLong = minLong + xExtent
maxLat = minLat + xExtent
if ( minLong < -180 or maxLong > 180 or
minLat < -90 or maxLat > 90):
print "bound error raised"
raise Http404
dbFile = "/home/john360/computing/geospatial_dev/geodjango_shapefile_app/DB/geodjango.db"
extentStr = "%s,%s,%s,%s" %(minLong, minLat, maxLong, maxLat)
map = mapnik.Map (TILE_WIDTH, TILE_HEIGHT,
'+proj=longlat +datum=WGS84 +no_defs')
map.background = mapnik.Color ("#7391ad")
# time.sleep (0.3)
# Set up the base layer
datasource = \
mapnik.SQLite(file=dbFile,
table="shapeEditor_baseMap",
key_field="id",
# srid=4326,
geometry_field="geometry",
extent=extentStr,
wkb_format="spatialite")
baseLayer = mapnik.Layer ("baseLayer")
baseLayer.datasource = datasource
baseLayer.styles.append ("baseLayerStyle")
rule = mapnik.Rule ()
rule.symbols.append (
mapnik.PolygonSymbolizer (mapnik.Color ("#b5d19c") )
)
rule.symbols.append (
mapnik.LineSymbolizer (mapnik.Color ("#404040"), 0.2 )
)
style = mapnik.Style ()
style.rules.append ( rule )
map.append_style ("baseLayerStyle", style)
map.layers.append (baseLayer)
# Define the feature layer
geometryField = utils.calcGeometryField ( shapefile.geom_type)
query = '( select ' + geometryField + \
' from "shapeEditor_feature" where ' + \
'shapefile_id = ' + str(shapefile.id) + ' ) as geom'
dbSettings = settings.DATABASES['default']
datasource = \
mapnik.PostGIS(user=dbSettings['USER'],
password=dbSettings['PASSWORD'],
dbname=dbSettings['NAME'],
table=query,
srid=4326,
geometry_field=geometryField,
geometry_table='"shapeEditor_feature"')
featureLayer = mapnik.Layer ("featureLayer")
featureLayer.datasource = datasource
featureLayer.styles.append ("featureLayerStyle")
rule = mapnik.Rule ()
if shapefile.geom_type in ["Point", "MultiPoint"]:
rule.symbols.append ( mapnik.LineSymbolizer (mapnik.Color ("#000000"), 0.5) )
elif shapefile.geom_type in ["Polygon", "Multipolygon"]:
rule.symbols.append ( mapnik.PolygonSymbolizer (mapnik.Color ("#b5d19c") ) )
rule.symbols.append ( mapnik.LineSymbolizer (mapnik.Color ("#000000"), 1) )
style = mapnik.Style ()
style.rules.append (rule)
map.append_style ("featureLayerStyle", style)
map.layers.append (featureLayer)
map.zoom_to_box (mapnik.Envelope (minLong, minLat, maxLong, maxLat ))
image = mapnik.Image ( TILE_WIDTH, TILE_HEIGHT)
mapnik.render (map, image)
imageData = image.tostring ('png')
return HttpResponse (imageData, mimetype="image/png")
except:
traceback.print_exc ()
return HttpResponse (" ")
def tileLayer(request, version, shapefile_id, zoom, x, y):
try:
if version != "1.0":
raise Http404
try:
shapefile = Shapefile.objects.get(id=shapefile_id, created_by=request.user)
except Shapefile.DoesNotExist:
raise Http404
zoom = int(zoom)
x = int(x)
y = int(y)
if zoom < 0 or zoom > MAX_ZOOM_LEVEL:
raise Http404
xExtent = _unitsPerPixel(zoom)
yExtent = _unitsPerPixel(zoom)
minLong = x * xExtent - 20037508.34
minLat = y * yExtent - 20037508.34
maxLong = minLong + xExtent
maxLat = minLat + yExtent
if (minLong < -20037508.34 or maxLong > 20037508.34 or minLat < -20037508.34 or maxLat > 20037508.34):
raise Http404
#create de mapnik.map object
map = mapnik.Map(TILE_WIDTH, TILE_HEIGHT, "+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +no_defs +over")
map.background = mapnik.Color("#f2f3f7")
#defining the feature layer
geometryField = utils.calcGeometryField(shapefile.geom_type)
field = "'NOM'"
field2 = "'CODE'"
query = '(select ' + geometryField + ', attribute_value->' + field +' as label, id_relat from "shapefile_feature" where' + ' shapefile_id in (' + str(shapefile.id) + ')) as geom'
feature = Feature.objects.filter(shapefile__id=shapefile_id).geojson()
adapter = DjLayer(feature)
lyr = adapter.to_mapnik()
lyr.srs = "+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +no_defs +over"
m = mapnik.Map(TILE_WIDTH, TILE_HEIGHT, "+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +no_defs +over")
## datasource = mapnik.PostGIS(user=dbSettings['USER'],
## password=dbSettings['PASSWORD'],
## dbname=dbSettings['NAME'],
## port=5433,
## table=query,
## srid=3857,
## geometry_field=geometryField,
## simplify_geometries=True,
## geometry_table='"shapefile_feature"')
## featureLayer = mapnik.Layer("featureLayer")
## featureLayer.srs = "+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +no_defs +over"
## featureLayer.datasource = datasource
## featureLayer.styles.append("featureLayerStyle")
##
#defining the feature layer styles
rule = mapnik.Rule()
if shapefile.geom_type in ["Point", "MultiPoint"]:
rule.symbols.append(mapnik.PointSymbolizer())
elif shapefile.geom_type in ["LineString", "MultiLineString"]:
rule.symbols.append(mapnik.LineSymbolizer(mapnik.Color("#000000"), 0.5))
elif shapefile.geom_type in ["Polygon", "MultiPolygon"]:
rule.symbols.append(mapnik.PolygonSymbolizer(mapnik.Color("#f7edee")))
rule.symbols.append(mapnik.LineSymbolizer(mapnik.Color("#000000"), 0.5))
##
## label = mapnik.TextSymbolizer(mapnik.Expression('[label]'), 'DejaVu Sans Book', 10, mapnik.Color('black'))
## label.halo_fill = mapnik.Color('white')
## label.halo_radius = 4
## label.label_placement = mapnik.label_placement.INTERIOR_PLACEMENT
## label.allow_overlap = True
## label.avoid_edges = True
## rule.symbols.append(label)
style = mapnik.Style()
style.rules.append(rule)
lyr.styles.append('name')
##
## #add new feature to the map
m.append_style("name", style)
m.layers.append(lyr)
## map.layers.append(featureLayer)
#rendering the map tile
mapnik.save_map(m, "../tilestache/%s/%s.xml" % (str(request.user), str(shapefile.filename)))
config = {
"cache": {
"name": "Disk",
"path": "../tilestache/%s" % (request.user),
"umask": "0000",
"dirs": "portable"},
"layers": {
shapefile.filename: {
"provider": {"name": "mapnik", "mapfile": "../tilestache/%s/%s.xml" % (request.user, shapefile.filename)},
"projection": "spherical mercator"
}
}
}
# like http://tile.openstreetmap.org/1/0/0.png
#coord = ModestMaps.Core.Coordinate(y, x, zoom)
path = "/%s/%s/%s/%s.png" % (shapefile.filename,zoom,x,y)
config = TileStache.Config.buildConfiguration(config)
#type, bytes = TileStache.getTile(config.layers[shapefile.filename], coord, 'png')
type, bytes = TileStache.requestHandler(config, path)
return HttpResponse(bytes, mimetype="image/png")
except:
traceback.print_exc()
return HttpResponse("")
def xml_map_config(request, zoom, x, y, basqui_map, layersMapOptions):
basqui_map.changed=False
basqui_map.save()
map = mapnik.Map(TILE_WIDTH, TILE_HEIGHT, "+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +no_defs +over")
for layer in layersMapOptions.all():
try:
layerLabel = LayerLabel.objects.get(layerMapOptions=layer)
except ObjectDoesNotExist:
layerLabel = None
for layerStyle in layer.styles.all():
shapefile = layer.layer
geometryField = utils.calcGeometryField(shapefile.geom_type)
if layerLabel:
query = '(select ' + geometryField + ', attribute_value->\''+ layerLabel.field.name +'\' as label, id_relat from "shapefile_feature" where' + ' shapefile_id in (' + str(shapefile.id) + ')) as geom'
else:
query = '(select ' + geometryField + ', id_relat from "shapefile_feature" where' + ' shapefile_id in (' + str(shapefile.id) + ')) as geom'
datasource = mapnik.PostGIS(user=dbSettings['USER'],
password=dbSettings['PASSWORD'],
dbname=dbSettings['NAME'],
port=5433,
table=query,
srid=3857,
geometry_field=geometryField,
geometry_table='"shapefile_feature"')
featureLayer = mapnik.Layer(str(shapefile.filename) + str(layerStyle.id))
featureLayer.srs = "+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +no_defs +over"
featureLayer.datasource = datasource
featureLayer.styles.append(str(shapefile.filename) + '_Style' + str(layerStyle.id))
#defining the feature layer styles
style_rule = mapnik.Rule()
if shapefile.geom_type in ["Point", "MultiPoint"]:
s = mapnik.PointSymbolizer(mapnik.PathExpression(str(layerStyle.iconName)))
s.allow_overlap = True
style_rule.symbols.append(s)
elif shapefile.geom_type in ["LineString", "MultiLineString"]:
style_rule.symbols.append(mapnik.LineSymbolizer(mapnik.Color(str(layerStyle.strokeColor)), layerStyle.strokeWeight))
elif shapefile.geom_type in ["Polygon", "MultiPolygon"]:
p = mapnik.PolygonSymbolizer(mapnik.Color(str((layerStyle.fillColor))))
p.fill_opacity = layerStyle.fillOpacity
style_rule.symbols.append(p)
style_rule.symbols.append(mapnik.LineSymbolizer(mapnik.Color(str(layerStyle.strokeColor)), layerStyle.strokeWeight))
layer_style = mapnik.Style()
layer_style.rules.append(style_rule)
#defining label styles
if layerLabel:
label_rule = mapnik.Rule()
label = mapnik.TextSymbolizer(mapnik.Expression('[label]'), 'DejaVu Sans Book', layerLabel.font_size, mapnik.Color(str(layerLabel.font_color)))
label.halo_fill = mapnik.Color(str(layerLabel.halo_color))
label.halo_radius = int(layerLabel.halo_radius)
#label.label_placement = mapnik.label_placement.INTERIOR_PLACEMENT
label.allow_overlap = False
label.avoid_edges = True
label_rule.symbols.append(label)
label_style = mapnik.Style()
label_style.rules.append(label_rule)
featureLayer.styles.append(str(shapefile.filename) + '_label' + str(layerStyle.id))
#add label to the map
map.append_style(str(shapefile.filename) + '_label' + str(layerStyle.id), label_style)
#add new feature to the map
map.append_style(str(shapefile.filename) + '_Style' + str(layerStyle.id), layer_style)
map.layers.append(featureLayer)
#saving the map mapnik xml
mapnik.save_map(map, "c:\\basqui\\tilestache\\%s\\%s.xml" % (str(request.user), str(basqui_map.map_name)))
def importData(file, characterEncoding, format, user, folder):
cursor = connection.cursor()
start_time = time.time()
#manage zipfile
fd,fname = tempfile.mkstemp(suffix=fileExt_dic[format])
os.close(fd)
f = open(fname, "wb")
for chunk in file.chunks():
f.write(chunk)
f.close()
if not zipfile.is_zipfile(fname):
os.remove(fname)
return "Not a valid zip archive.", None
zip = zipfile.ZipFile(fname)
hasSuffix = {}
required_suffixes = suffixes_dic[format]
for suffix in required_suffixes:
hasSuffix[suffix] = False
for info in zip.infolist():
extension = os.path.splitext(info.filename)[1].lower()
if extension in required_suffixes:
hasSuffix[extension] = True
for suffix in required_suffixes:
if not hasSuffix[suffix]:
zip.close()
os.remove(fname)
return "Archive missing required %s file." % suffix, None
zip = zipfile.ZipFile(fname)
shapefileName = None
dirname = tempfile.mkdtemp()
for info in zip.infolist():
if info.filename.lower().endswith(filenameExt_dic[format]):
shapefileName = info.filename
dstFile = os.path.join(dirname, info.filename)
f = open(dstFile, "wb")
f.write(zip.read(info.filename))
f.close()
zip.close()
#verify if shapefile is valid
try:
srcPath = os.path.join(dirname,shapefileName)
srcLayers = fiona.listlayers(srcPath)
shapefileOK = True
except:
traceback.print_exc()
shapefileOK = False
if not shapefileOK:
os.remove(fname)
shutil.rmtree(dirname)
return "Not a valid vector file.", None
#add shapefile object to database
try:
for i in srcLayers:
with fiona.open(srcPath) as c:
srcSpatialRef = to_string(c.crs)
print srcSpatialRef
project = CoordTransform(SpatialReference(srcSpatialRef),SpatialReference(3857))
geometryType = c.schema['geometry']
shapefile = Shapefile.objects.create(filename=c.name, parent=folder, srs_wkt=srcSpatialRef, geom_type=geometryType, encoding=characterEncoding, created_by=user)
#define shapefile's attributes
for keys, values in c.schema['properties'].iteritems():
dict = {}
dict['name'] = keys
props = re.split('\W+', values)
dict['type'] = utils.fionaTypeToInt(props[0])
try:
dict['width'] = int(props[1])
except IndexError:
dict['width'] = 0
if dict['type'] == 2:
try:
dict['precision'] = int(props[2])
except IndexError:
dict['precision'] = 15
else:
dict['precision'] = 0
attr = Attribute.objects.create(shapefile=shapefile, **dict)
#store shapefile's features
for srcFeature in c:
try:
wkt = dumps(srcFeature['geometry'])
geosGeometry = GEOSGeometry(wkt)
geosGeometry.srid = SpatialReference(srcSpatialRef).srid
geosGeometry.transform(project)
except TypeError:
geosGeometry = None
geometryField = utils.calcGeometryField(geometryType)
args = {}
args['shapefile'] = shapefile
args[geometryField] = geosGeometry
args['attribute_value'] = srcFeature['properties']
args['id_relat'] = srcFeature['id']
feature = Feature.objects.create(**args)
print("Temps final: --- %s seconds ---" % str(time.time() - start_time))
return None, shapefile
except BaseException, e:
#cleaning up
os.remove(fname)
shutil.rmtree(dirname, ignore_errors=False, onerror=handleRemoveReadonly)
shapefile.delete()
return e, None
def tile(request, version, shapefile_id, zoom, x, y):
shapefile = None
try:
if version != "1.0":
raise Http404
try:
shapefile = Shapefile.objects.get(id=shapefile_id)
except Shapefile.DoesNotExist:
raise Http404
zoom = int(zoom)
x = int(x)
y = int(y)
if zoom < 0 or zoom > MAX_ZOOM_LEVEL:
raise Http404
xExtent = _unitsPerPixel(zoom) * TILE_WIDTH
yExtent = _unitsPerPixel(zoom) * TILE_HEIGHT
minLong = xExtent * x - 180.0
minLat = yExtent * y - 90.0
maxLong = minLong + xExtent
maxLat = minLat + xExtent
#if (minLong < -180 or maxLong > 180 or
#minLat < -90 or maxLat > 90):
#raise Http404
map = mapnik.Map(TILE_WIDTH, TILE_HEIGHT, "+proj=longlat +datum=WGS84")
map.background = mapnik.Color("#7391ad")
dbSettings = settings.DATABASES['default']
datasource = mapnik.PostGIS(host='localhost',
user='******',
password='******',
dbname='spatial',
table='"shapeEditor_basemap"',
srid=4326,
geometry_field="geometry",
geometry_table='"shapeEditor_basemap"')
baseLayer = mapnik.Layer("baseLayer")
baseLayer.datasource = datasource
baseLayer.styles.append("baseLayerStyle")
rule = mapnik.Rule()
rule.symbols.append(mapnik.PolygonSymbolizer(mapnik.Color("#b5d19c")))
rule.symbols.append(mapnik.LineSymbolizer(mapnik.Color("#000000"),
0.1))
style = mapnik.Style()
style.rules.append(rule)
map.append_style("baseLayerStyle", style)
map.layers.append(baseLayer)
geometryField = utils.calcGeometryField(shapefile.geom_type)
query = '(select ' + geometryField + ' from "shapeEditor_feature" where' + ' shapefile_id=' + str(
shapefile.id) + ') as geom'
datasource = mapnik.PostGIS(host='localhost',
user='******',
password='******',
dbname='spatial',
table=query,
srid=4326,
geometry_field=geometryField,
geometry_table='"shapeEditor_feature"')
featureLayer = mapnik.Layer("featureLayer")
featureLayer.datasource = datasource
featureLayer.styles.append("featureLayerStyle")
rule = mapnik.Rule()
if shapefile.geom_type in ["Point", "MultiPoint"]:
rule.symbols.append(mapnik.PointSymbolizer())
elif shapefile.geom_type in ["LineString", "MultiLineString"]:
rule.symbols.append(
mapnik.LineSymbolizer(mapnik.Color("#000000"), 0.5))
elif shapefile.geom_type in ["Polygon", "MultiPolygon"]:
rule.symbols.append(
mapnik.PolygonSymbolizer(mapnik.Color("#f7edee")))
rule.symbols.append(
mapnik.LineSymbolizer(mapnik.Color("#000000"), 0.5))
style = mapnik.Style()
style.rules.append(rule)
map.append_style("featureLayerStyle", style)
map.layers.append(featureLayer)
map.zoom_to_box(mapnik.Box2d(minLong, minLat, maxLong, maxLat))
image = mapnik.Image(TILE_WIDTH, TILE_HEIGHT)
mapnik.render(map, image)
imageData = image.tostring('png')
return HttpResponse(imageData, content_type="image/png")
except:
traceback.print_exc()
return HttpResponse("")
def tileLayer(request, version, shapefile_id, zoom, x, y):
try:
if version != "1.0":
raise Http404
try:
shapefile = Shapefile.objects.get(id=shapefile_id, created_by=request.user)
geometryField = utils.calcGeometryField(shapefile.geom_type)
layerExtent = " ".join(map(str, (shapefile.feature_set.extent(field_name=geometryField))))
except Shapefile.DoesNotExist:
raise Http404
zoom = int(zoom)
x = int(x)
y = int(y)
if zoom < 0 or zoom > MAX_ZOOM_LEVEL:
raise Http404
xExtent = _unitsPerPixel(zoom)
yExtent = _unitsPerPixel(zoom)
minLong = x * xExtent - 20037508.34
minLat = y * yExtent - 20037508.34
maxLong = minLong + xExtent
maxLat = minLat + yExtent
if minLong < -20037508.34 or maxLong > 20037508.34 or minLat < -20037508.34 or maxLat > 20037508.34:
raise Http404
# create de mapnik.map object
mapXML = mapnik.Map(
TILE_WIDTH,
TILE_HEIGHT,
"+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +no_defs +over",
)
mapXML.buffer_size = 128
# defining the feature layer
query = (
"(select "
+ geometryField
+ ', id_relat as label from "layers_feature" WHERE shapefile_id = '
+ str(shapefile.id)
+ ") as geom"
)
datasource = mapnik.PostGIS(
host=dbSettings["HOST"],
user=dbSettings["USER"],
password=dbSettings["PASSWORD"],
dbname=dbSettings["NAME"],
port=dbSettings["PORT"],
table=query,
srid=3857,
estimate_extent=False,
extent=layerExtent,
geometry_field=geometryField,
simplify_geometries=True,
geometry_table='"layers_feature"',
)
featureLayer = mapnik.Layer("featureLayer")
featureLayer.srs = "+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +no_defs +over"
featureLayer.cache_features = True
featureLayer.datasource = datasource
featureLayer.styles.append("featureLayerStyle")
# defining the feature layer styles
rule = mapnik.Rule()
if shapefile.geom_type in ["Point", "3D Point", "MultiPoint", "3D MultiPoint"]:
rule.symbols.append(mapnik.PointSymbolizer())
elif shapefile.geom_type in ["LineString", "3D LineString", "MultiLineString", "3D MultiLineString"]:
rule.symbols.append(mapnik.LineSymbolizer(mapnik.Color("#000000"), 0.5))
elif shapefile.geom_type in ["Polygon", "3D Polygon", "MultiPolygon", "3D MultiPolygon"]:
rule.symbols.append(mapnik.PolygonSymbolizer(mapnik.Color("#f7edee")))
rule.symbols.append(mapnik.LineSymbolizer(mapnik.Color("#000000"), 0.5))
style = mapnik.Style()
style.rules.append(rule)
mapXML.append_style("featureLayerStyle", style)
label_rule = mapnik.Rule()
label = mapnik.TextSymbolizer(mapnik.Expression("[label]"), "DejaVu Sans Book", 10, mapnik.Color("black"))
label.halo_radius = 4
label.allow_overlap = False
label.avoid_edges = True
label_rule.symbols.append(label)
label_style = mapnik.Style()
label_style.rules.append(label_rule)
featureLayer.styles.append("featureLayerStyle_label")
# add label to the map
mapXML.append_style("featureLayerStyle_label", label_style)
# add new feature to the map
mapXML.layers.append(featureLayer)
# rendering the map tile
mapnik_xml_path = "../tilestache/%s/layers/vector/viewer/%s.xml" % (str(request.user), str(shapefile.name))
mapnik.save_map(mapXML, mapnik_xml_path)
config = {
"cache": {"name": "Test", "path": "../tilestache/%s" % (request.user), "umask": "0000", "dirs": "portable"},
"layers": {
shapefile.name: {
"provider": {"name": "mapnik", "mapfile": mapnik_xml_path},
"metatile": {"rows": 2, "columns": 2, "buffer": 64},
"projection": "spherical mercator",
"write cache": False,
}
},
}
# like http://tile.openstreetmap.org/1/0/0.png
# coord = ModestMaps.Core.Coordinate(y, x, zoom)
path = "/%s/%s/%s/%s.png" % (shapefile.name, zoom, x, y)
config = TileStache.Config.buildConfiguration(config)
# type, bytes = TileStache.getTile(config.layers[shapefile.filename], coord, 'png')
type, bytes = TileStache.requestHandler(config, path)
return HttpResponse(bytes, content_type="image/png")
except:
traceback.print_exc()
return HttpResponse("")
def importData (shapefile, characterEncoding ):
fname = None
# store a copy of the UploadedFile so it can be manipulated
fd, fname = tempfile.mkstemp (suffix=".zip")
os.close (fd)
f = open (fname , "wb")
for chunk in shapefile.chunks ():
f.write (chunk)
f.close ()
# ----------
if not zipfile.is_zipfile (fname):
os.remove (fname)
return "Not a valid zip archive %s " %(fname)
# check that the shapefile zip has the required files
zip = zipfile.ZipFile (fname)
required_suffixes = [ ".shp" , ".shx" , ".dbf" , ".prj" ]
hasSuffix = {}
for suffix in required_suffixes:
hasSuffix [suffix] = False
for info in zip.infolist ():
extn = os.path.splitext (info.filename) [1].lower ()
if (extn in required_suffixes):
hasSuffix [extn] = True
for suffix in required_suffixes:
if not hasSuffix [suffix]:
zip.close ()
os.remove ( fname )
return "Archive missing required "+suffix+" file."
# save the shapefile components (shp, dff etc) into
# a temporary directory
zip = zipfile.ZipFile (fname)
shapefileName = None
dirname = tempfile.mkdtemp ()
for info in zip.infolist ():
if info.filename.endswith (".shp"):
shapefileName = info.filename
dstFile = os.path.join ( dirname, info.filename )
f = open (dstFile, "wb")
f.write (zip.read ( info.filename ) )
f.close ()
zip.close ()
# Use OGR to (try to) open up the Shapefile
try:
datasource= ogr.Open (os.path.join ( dirname , shapefileName ) )
layer = datasource.GetLayer (0)
shapeFileOK = True
except:
traceback.print_exc()
shapeFileOK = False
if not shapeFileOK:
os.remove (fname)
shutil.rmtree (dirname)
return "Not a valid shapefile... couldn't open it with OGR"
# Add the shapefile to the database
srcSpatialRef = layer.GetSpatialRef ()
geometryType = layer.GetLayerDefn ().GetGeomType ()
geometryName = utils.ogrTypeToGeometryName (geometryType)
print "about to save shapefile. The details: "
print ".. srs_skt " + srcSpatialRef.ExportToWkt ()
print ".. shapefileName: " + shapefileName
# TODO. This will be truncated and should not be...
srs_wkd = srcSpatialRef.ExportToWkt () [0:254]
shapefile = Shapefile ( filename = shapefileName ,
srs_wkd = srs_wkd,
geom_type= geometryName,
encoding = characterEncoding)
shapefile.save ()
# Add the shapefile's attributes to the database
attributes = []
layerDef = layer.GetLayerDefn ()
for counter in range ( layerDef.GetFieldCount () ):
fieldDef = layerDef.GetFieldDefn ( counter )
attr = Attribute ( shapefile = shapefile ,
name = fieldDef.GetName () ,
type = fieldDef.GetType () , # int code
precision = fieldDef.GetPrecision () ,
width = fieldDef.GetWidth ()
)
attr.save ()
attributes.append (attr)
# Import the features
dstSpatialRef = osr.SpatialReference ()
dstSpatialRef.ImportFromEPSG ( 4326 )
coordTransform = osr.CoordinateTransformation ( srcSpatialRef , dstSpatialRef )
for count in range ( layer.GetFeatureCount () ):
srcFeature = layer.GetFeature ( count )
srcGeometry = srcFeature.GetGeometryRef ()
srcGeometry.Transform ( coordTransform )
# return a limited set of geometries ..
geometry = utils.wrapGEOSGeometry ( srcGeometry )
# Geometry field will correspond with the field name in Feature class / table
geometryField = utils.calcGeometryField (geometryName) \
# param is e.g. LineString / Point
args = {}
args[ 'shapefile'] = shapefile
args[ geometryField] = geometry
feature = Feature ( **args )
feature.save ()
# save the attribute values
for attr in attributes:
# srcFeature (ogr.Layer.Feature)
# attr (shapeEditor.models.Attribute)
success, result = utils.getOGRFeatureAttribute (
attr, srcFeature,
characterEncoding )
if not success:
os.remove (fname)
shutil.rmtree (dirname)
shapefile.delete ()
return result
value = result
attrValue = AttributeValue ( feature = feature,
attribute = attr ,
value = value )
attrValue.save ()
os.remove (fname)
shutil.rmtree (dirname)
return None
def importData(shapefile, characterEncoding):
fname = None
# store a copy of the UploadedFile so it can be manipulated
fd, fname = tempfile.mkstemp(suffix=".zip")
os.close(fd)
f = open(fname, "wb")
for chunk in shapefile.chunks():
f.write(chunk)
f.close()
# ----------
if not zipfile.is_zipfile(fname):
os.remove(fname)
return "Not a valid zip archive %s " % (fname)
# check that the shapefile zip has the required files
zip = zipfile.ZipFile(fname)
required_suffixes = [".shp", ".shx", ".dbf", ".prj"]
hasSuffix = {}
for suffix in required_suffixes:
hasSuffix[suffix] = False
for info in zip.infolist():
extn = os.path.splitext(info.filename)[1].lower()
if (extn in required_suffixes):
hasSuffix[extn] = True
for suffix in required_suffixes:
if not hasSuffix[suffix]:
zip.close()
os.remove(fname)
return "Archive missing required " + suffix + " file."
# save the shapefile components (shp, dff etc) into
# a temporary directory
zip = zipfile.ZipFile(fname)
shapefileName = None
dirname = tempfile.mkdtemp()
for info in zip.infolist():
if info.filename.endswith(".shp"):
shapefileName = info.filename
dstFile = os.path.join(dirname, info.filename)
f = open(dstFile, "wb")
f.write(zip.read(info.filename))
f.close()
zip.close()
# Use OGR to (try to) open up the Shapefile
try:
datasource = ogr.Open(os.path.join(dirname, shapefileName))
layer = datasource.GetLayer(0)
shapeFileOK = True
except:
traceback.print_exc()
shapeFileOK = False
if not shapeFileOK:
os.remove(fname)
shutil.rmtree(dirname)
return "Not a valid shapefile... couldn't open it with OGR"
# Add the shapefile to the database
srcSpatialRef = layer.GetSpatialRef()
geometryType = layer.GetLayerDefn().GetGeomType()
geometryName = utils.ogrTypeToGeometryName(geometryType)
print "about to save shapefile. The details: "
print ".. srs_skt " + srcSpatialRef.ExportToWkt()
print ".. shapefileName: " + shapefileName
# TODO. This will be truncated and should not be...
srs_wkd = srcSpatialRef.ExportToWkt()[0:254]
shapefile = Shapefile(filename=shapefileName,
srs_wkd=srs_wkd,
geom_type=geometryName,
encoding=characterEncoding)
shapefile.save()
# Add the shapefile's attributes to the database
attributes = []
layerDef = layer.GetLayerDefn()
for counter in range(layerDef.GetFieldCount()):
fieldDef = layerDef.GetFieldDefn(counter)
attr = Attribute(
shapefile=shapefile,
name=fieldDef.GetName(),
type=fieldDef.GetType(), # int code
precision=fieldDef.GetPrecision(),
width=fieldDef.GetWidth())
attr.save()
attributes.append(attr)
# Import the features
dstSpatialRef = osr.SpatialReference()
dstSpatialRef.ImportFromEPSG(4326)
coordTransform = osr.CoordinateTransformation(srcSpatialRef, dstSpatialRef)
for count in range(layer.GetFeatureCount()):
srcFeature = layer.GetFeature(count)
srcGeometry = srcFeature.GetGeometryRef()
srcGeometry.Transform(coordTransform)
# return a limited set of geometries ..
geometry = utils.wrapGEOSGeometry(srcGeometry)
# Geometry field will correspond with the field name in Feature class / table
geometryField = utils.calcGeometryField (geometryName) \
# param is e.g. LineString / Point
args = {}
args['shapefile'] = shapefile
args[geometryField] = geometry
feature = Feature(**args)
feature.save()
# save the attribute values
for attr in attributes:
# srcFeature (ogr.Layer.Feature)
# attr (shapeEditor.models.Attribute)
success, result = utils.getOGRFeatureAttribute(
attr, srcFeature, characterEncoding)
if not success:
os.remove(fname)
shutil.rmtree(dirname)
shapefile.delete()
return result
value = result
attrValue = AttributeValue(feature=feature,
attribute=attr,
value=value)
attrValue.save()
os.remove(fname)
shutil.rmtree(dirname)
return None
def importData(file, characterEncoding, format, user, folder):
cursor = connection.cursor()
start_time = time.time()
#manage zipfile
fd, fname = tempfile.mkstemp(suffix=fileExt_dic[format])
os.close(fd)
f = open(fname, "wb")
for chunk in file.chunks():
f.write(chunk)
f.close()
if not zipfile.is_zipfile(fname):
os.remove(fname)
return "Not a valid zip archive.", None
zip = zipfile.ZipFile(fname)
hasSuffix = {}
required_suffixes = suffixes_dic[format]
for suffix in required_suffixes:
hasSuffix[suffix] = False
for info in zip.infolist():
extension = os.path.splitext(info.filename)[1].lower()
if extension in required_suffixes:
hasSuffix[extension] = True
for suffix in required_suffixes:
if not hasSuffix[suffix]:
zip.close()
os.remove(fname)
return "Archive missing required %s file." % suffix, None
zip = zipfile.ZipFile(fname)
shapefileName = None
dirname = tempfile.mkdtemp()
for info in zip.infolist():
if info.filename.lower().endswith(filenameExt_dic[format]):
shapefileName = info.filename
dstFile = os.path.join(dirname, info.filename)
f = open(dstFile, "wb")
f.write(zip.read(info.filename))
f.close()
zip.close()
#verify if shapefile is valid
try:
srcPath = os.path.join(dirname, shapefileName)
srcLayers = fiona.listlayers(srcPath)
shapefileOK = True
except:
traceback.print_exc()
shapefileOK = False
if not shapefileOK:
os.remove(fname)
shutil.rmtree(dirname)
return "Not a valid vector file.", None
#add shapefile object to database
try:
for i in srcLayers:
with fiona.open(srcPath) as c:
srcSpatialRef = to_string(c.crs)
print srcSpatialRef
project = CoordTransform(SpatialReference(srcSpatialRef),
SpatialReference(3857))
geometryType = c.schema['geometry']
shapefile = Shapefile.objects.create(
filename=c.name,
parent=folder,
srs_wkt=srcSpatialRef,
geom_type=geometryType,
encoding=characterEncoding,
created_by=user)
#define shapefile's attributes
for keys, values in c.schema['properties'].iteritems():
dict = {}
dict['name'] = keys
props = re.split('\W+', values)
dict['type'] = utils.fionaTypeToInt(props[0])
try:
dict['width'] = int(props[1])
except IndexError:
dict['width'] = 0
if dict['type'] == 2:
try:
dict['precision'] = int(props[2])
except IndexError:
dict['precision'] = 15
else:
dict['precision'] = 0
attr = Attribute.objects.create(shapefile=shapefile,
**dict)
#store shapefile's features
for srcFeature in c:
try:
wkt = dumps(srcFeature['geometry'])
geosGeometry = GEOSGeometry(wkt)
geosGeometry.srid = SpatialReference(
srcSpatialRef).srid
geosGeometry.transform(project)
except TypeError:
geosGeometry = None
geometryField = utils.calcGeometryField(geometryType)
args = {}
args['shapefile'] = shapefile
args[geometryField] = geosGeometry
args['attribute_value'] = srcFeature['properties']
args['id_relat'] = srcFeature['id']
feature = Feature.objects.create(**args)
print("Temps final: --- %s seconds ---" %
str(time.time() - start_time))
return None, shapefile
except BaseException, e:
#cleaning up
os.remove(fname)
shutil.rmtree(dirname,
ignore_errors=False,
onerror=handleRemoveReadonly)
shapefile.delete()
return e, None
def exportData(shapefile):
dstDir = tempfile.mkdtemp()
dstFile = str(os.path.join(dstDir, shapefile.filename))
dstSpatialRef = osr.SpatialReference()
dstSpatialRef.ImportFromWkt(shapefile.srs_wkd)
driver = ogr.GetDriverByName("ESRI Shapefile")
datasource = driver.CreateDataSource(dstFile)
layer = datasource.CreateLayer(str(shapefile.filename), dstSpatialRef)
# find the spatial reference
srcSpatialRef = osr.SpatialReference()
srcSpatialRef.ImportFromEPSG(4326)
coordTransform = osr.CoordinateTransformation(srcSpatialRef, dstSpatialRef)
geomField = utils.calcGeometryField(shapefile.geom_type)
# Define layer attributes
for attr in shapefile.attribute_set.all():
field = ogr.FieldDefn(str(attr.name), attr.type)
field.SetWidth(attr.width)
field.SetPrecision(attr.precision)
layer.CreateField(field)
# Add all the (Single type) geometries for this layer
for feature in shapefile.feature_set.all():
# Geometry is a django construct inherited from GeometryField
geometry = getattr(feature, geomField)
geometry = utils.unwrapGEOSGeometry(geometry)
dstGeometry = ogr.CreateGeometryFromWkt(geometry.wkt)
dstGeometry.Transform(coordTransform)
dstFeature = ogr.Feature(layer.GetLayerDefn())
dstFeature.SetGeometry(dstGeometry)
# add in the feature's attributes
for attrValue in feature.attributevalue_set.all():
utils.setOGRFeatureAttribute(attrValue.attribute, attrValue.value,
dstFeature, shapefile.encoding)
layer.CreateFeature(dstFeature)
dstFeature.Destroy()
datasource.Destroy()
# Compress the shapefile
temp = tempfile.TemporaryFile()
zipHandle = zipfile.ZipFile(temp, 'w', zipfile.ZIP_DEFLATED)
for fName in os.listdir(dstDir):
zipHandle.write(os.path.join(dstDir, fName), fName)
zipHandle.close()
# useful links to temp's directory
# shapefileBase = os.path.splitext ( dstFile) [0]
shapefileName = os.path.splitext(shapefile.filename)[0]
# Delete the temporary files
shutil.rmtree(dstDir)
# Return the zip archive to the user
f = FileWrapper(temp)
response = HttpResponse(f, content_type="application\zip")
response ['Content-Disposition'] = \
"attachment; filename=" + shapefileName + ".zip"
response['Content-Length'] = temp.tell()
temp.seek(0)
return response
def tileFeature(request, version, shapefile_id, feature_id, zoom, x, y):
try:
if version != "1.0":
raise Http404
try:
shapefile = Shapefile.objects.get(id=shapefile_id,
created_by=request.user)
except Shapefile.DoesNotExist:
raise Http404
zoom = int(zoom)
x = int(x)
y = int(y)
if zoom < 0 or zoom > MAX_ZOOM_LEVEL:
raise Http404
xExtent = _unitsPerPixel(zoom)
yExtent = _unitsPerPixel(zoom)
minLong = x * xExtent - 20037508.34
minLat = y * yExtent - 20037508.34
maxLong = minLong + xExtent
maxLat = minLat + yExtent
if (minLong < -20037508.34 or maxLong > 20037508.34
or minLat < -20037508.34 or maxLat > 20037508.34):
raise Http404
#create mapnik.map object
map = mapnik.Map(
TILE_WIDTH, TILE_HEIGHT,
"+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +no_defs +over"
)
map.background = mapnik.Color("#fff")
#defining the feature layer
geometryField = utils.calcGeometryField(shapefile.geom_type)
query = '(select ' + geometryField + ', id, id_relat as label from "layers_feature" WHERE shapefile_id = ' + str(
shapefile.id) + ' AND id = ' + str(feature_id) + ') as geom'
datasource = mapnik.PostGIS(host=dbSettings['HOST'],
user=dbSettings['USER'],
password=dbSettings['PASSWORD'],
dbname=dbSettings['NAME'],
port=dbSettings['PORT'],
table=query,
srid=3857,
geometry_field=geometryField,
simplify_geometries=True,
geometry_table='"layers_feature"')
featureLayer = mapnik.Layer("featureLayer")
featureLayer.srs = "+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +no_defs +over"
featureLayer.datasource = datasource
featureLayer.styles.append("featureLayerStyle")
#defining the feature layer styles
rule = mapnik.Rule()
if shapefile.geom_type in [
"Point", "3D Point", "MultiPoint", "3D MultiPoint"
]:
rule.symbols.append(mapnik.PointSymbolizer())
elif shapefile.geom_type in [
"LineString", "3D LineString", "MultiLineString",
"3D MultiLineString"
]:
rule.symbols.append(
mapnik.LineSymbolizer(mapnik.Color("#000000"), 0.5))
elif shapefile.geom_type in [
"Polygon", "3D Polygon", "MultiPolygon", "3D MultiPolygon"
]:
rule.symbols.append(
mapnik.PolygonSymbolizer(mapnik.Color("#f7edee")))
rule.symbols.append(
mapnik.LineSymbolizer(mapnik.Color("#000000"), 0.5))
style = mapnik.Style()
style.rules.append(rule)
map.append_style("featureLayerStyle", style)
label_rule = mapnik.Rule()
label = mapnik.TextSymbolizer(mapnik.Expression('[label]'),
'DejaVu Sans Book', 10,
mapnik.Color('black'))
label.halo_radius = 4
label.allow_overlap = False
label.avoid_edges = True
label_rule.symbols.append(label)
label_style = mapnik.Style()
label_style.rules.append(label_rule)
featureLayer.styles.append("featureLayerStyle_label")
#add label to the map
map.append_style("featureLayerStyle_label", label_style)
#add new feature to the map
map.layers.append(featureLayer)
#rendering the map tile
mapnik_xml_path = "../tilestache/%s/layers/vector/lightViewer/%s.xml" % (
str(request.user), str(shapefile.name))
mapnik.save_map(map, mapnik_xml_path)
config = {
"cache": {
"name": "Test",
"path": "../tilestache/%s" % (request.user),
"umask": "0000",
"dirs": "portable"
},
"layers": {
shapefile.name: {
"provider": {
"name": "mapnik",
"mapfile": mapnik_xml_path
},
"metatile": {
"rows": 2,
"columns": 2,
"buffer": 64
},
"projection": "spherical mercator",
"write cache": False
}
}
}
path = "/%s/%s/%s/%s.png" % (shapefile.name, zoom, x, y)
config = TileStache.Config.buildConfiguration(config)
type, bytes = TileStache.requestHandler(config, path)
return HttpResponse(bytes, content_type="image/png")
except:
traceback.print_exc()
return HttpResponse("")
def importData(shapefile, characterEncoding):
""" Attempt to import the contents of a shapefile into our database.
'shapefile' is the Django UploadedFile object that was uploaded, and
'characterEncoding' is the character encoding to use for interpreting
the shapefile's string attributes.
We return None if the import succeeded. Otherwise we return a string
containing a suitable error message explaining why the shapefile can't
be imported.
"""
# Copy the zip archive into a temporary file.
fd,fname = tempfile.mkstemp(suffix=".zip")
os.close(fd)
f = open(fname, "wb")
for chunk in shapefile.chunks():
f.write(chunk)
f.close()
# Open the zip file and check its contents.
if not zipfile.is_zipfile(fname):
os.remove(fname)
return "Not a valid zip archive."
zip = zipfile.ZipFile(fname)
required_suffixes = [".shp", ".shx", ".dbf", ".prj"]
hasSuffix = {}
for suffix in required_suffixes:
hasSuffix[suffix] = False
for info in zip.infolist():
extension = os.path.splitext(info.filename)[1].lower()
if extension in required_suffixes:
hasSuffix[extension] = True
else:
print "Extraneous file: " + info.filename
for suffix in required_suffixes:
if not hasSuffix[suffix]:
zip.close()
os.remove(fname)
return "Archive missing required " + suffix + " file."
# Decompress the zip archive into a temporary directory. At the same
# time, we get the name of the main ".shp" file.
zip = zipfile.ZipFile(fname)
shapefileName = None
dirname = tempfile.mkdtemp()
for info in zip.infolist():
if info.filename.endswith(".shp"):
shapefileName = info.filename
dstFile = os.path.join(dirname, info.filename)
f = open(dstFile, "wb")
f.write(zip.read(info.filename))
f.close()
zip.close()
# Attempt to open the shapefile.
try:
datasource = ogr.Open(os.path.join(dirname, shapefileName))
layer = datasource.GetLayer(0)
shapefileOK = True
except:
traceback.print_exc()
shapefileOK = False
if not shapefileOK:
os.remove(fname)
shutil.rmtree(dirname)
return "Not a valid shapefile."
# Import the data from the opened shapefile.
geometryType = layer.GetLayerDefn().GetGeomType()
geometryName = utils.ogrTypeToGeometryName(geometryType)
srcSpatialRef = layer.GetSpatialRef()
dstSpatialRef = osr.SpatialReference()
dstSpatialRef.ImportFromEPSG(4326)
shapefile = Shapefile(filename=shapefileName,
srs_wkt=srcSpatialRef.ExportToWkt(),
geom_type=geometryName,
encoding=characterEncoding)
shapefile.save()
attributes = []
layerDef = layer.GetLayerDefn()
for i in range(layerDef.GetFieldCount()):
fieldDef = layerDef.GetFieldDefn(i)
attr = Attribute(shapefile=shapefile,
name=fieldDef.GetName(),
type=fieldDef.GetType(),
width=fieldDef.GetWidth(),
precision=fieldDef.GetPrecision())
attr.save()
attributes.append(attr)
coordTransform = osr.CoordinateTransformation(srcSpatialRef,
dstSpatialRef)
for i in range(layer.GetFeatureCount()):
srcFeature = layer.GetFeature(i)
srcGeometry = srcFeature.GetGeometryRef()
srcGeometry.Transform(coordTransform)
geometry = GEOSGeometry(srcGeometry.ExportToWkt())
geometry = utils.wrapGEOSGeometry(geometry)
geometryField = utils.calcGeometryField(geometryName)
args = {}
args['shapefile'] = shapefile
args[geometryField] = geometry
feature = Feature(**args)
feature.save()
for attr in attributes:
success,result = \
utils.getOGRFeatureAttribute(attr, srcFeature,
characterEncoding)
if not success:
os.remove(fname)
shutil.rmtree(dirname)
shapefile.delete()
return result
attrValue = AttributeValue(feature=feature,
attribute=attr,
value=result)
attrValue.save()
# Finally, clean everything up.
os.remove(fname)
shutil.rmtree(dirname)
return None # success.
def exportMultiLayersData(layers, encoding, EPSG, format):
try:
dstSpatialRef = osr.SpatialReference()
dstSpatialRef.ImportFromEPSG(EPSG)
driver = ogr.GetDriverByName(ogrDriver_dic[format])
dstDir = tempfile.mkdtemp()
dstFile = str(os.path.join(dstDir, layers[0].name+filenameExt_dic[format]))
datasource = driver.CreateDataSource(dstFile)
for layer in layers:
vlayer = datasource.CreateLayer(str(layer.name),dstSpatialRef)
#retrive attributes
for attr in layer.attribute_set.all():
field = ogr.FieldDefn(str(attr.name), attr.type)
field.SetWidth(attr.width)
field.SetPrecision(attr.precision)
vlayer.CreateField(field)
#save features in shapefile
srcSpatialRef = osr.SpatialReference()
srcSpatialRef.ImportFromEPSG(3857)
coordTransform = osr.CoordinateTransformation(srcSpatialRef, dstSpatialRef)
geomField = utils.calcGeometryField(layer.geom_type)
for feature in layer.feature_set.all().order_by('id_relat'):
if geometry:
geometry = getattr(feature, geomField)
geometry = utils.unwrapGEOSGeometry(geometry)
dstGeometry = ogr.CreateGeometryFromWkt(geometry.wkt)
dstGeometry.Transform(coordTransform)
else:
dstGeometry = None
#save attributes in the shapefile
dstFeature = ogr.Feature(vlayer.GetLayerDefn())
dstFeature.SetGeometry(dstGeometry)
for attrName, attrValue in feature.attribute_value.iteritems():
attribute = Attribute.objects.get(name=str(attrName), shapefile=feature.shapefile)
utils.setOGRFeatureAttribute(attribute, attrValue, dstFeature, encoding)
vlayer.CreateFeature(dstFeature)
dstFeature.Destroy()
datasource.Destroy()
#compress the shapefile
temp = tempfile.TemporaryFile()
zip = zipfile.ZipFile(temp, 'w', zipfile.ZIP_DEFLATED)
shapefileBase = os.path.splitext(dstFile)[0]
shapefileName = os.path.splitext(layer.name)[0]
for fName in os.listdir(dstDir):
zip.write(os.path.join(dstDir, fName), fName)
zip.close()
#delete temporary files
shutil.rmtree(dstDir)
#return the zip to user
f = FileWrapper(temp)
response = StreamingHttpResponse(f, content_type="application/zip")
response['Content-Disposition'] = "attachment; filename=" + shapefileName + fileExt_dic[format]
response['Content-Length'] = temp.tell()
temp.seek(0)
return None, response
except BaseException, e:
return e.rstrip('\n'), None
def tile(request, version, shapefile_id, zoom, x, y):
shapefile = None
try:
if version != "1.0":
raise Http404
try:
shapefile = Shapefile.objects.get(id=shapefile_id)
except Shapefile.DoesNotExist:
raise Http404
zoom = int(zoom)
x = int(x)
y = int(y)
# min(x) = 0, max (x) =
if zoom < 0 or zoom > MAX_ZOOM_LEVEL:
raise Http404
# for TILE_WIDTH/HEIGHT==256
# at zoom = 0 extents will be 180 units/degrees
xExtent = _unitsPerPixel(zoom) * TILE_WIDTH
yExtent = _unitsPerPixel(zoom) * TILE_HEIGHT
minLong = xExtent * x - 180.0
minLat = yExtent * y - 90.0
maxLong = minLong + xExtent
maxLat = minLat + xExtent
if (minLong < -180 or maxLong > 180 or minLat < -90 or maxLat > 90):
print "bound error raised"
raise Http404
dbFile = "/home/john360/computing/geospatial_dev/geodjango_shapefile_app/DB/geodjango.db"
extentStr = "%s,%s,%s,%s" % (minLong, minLat, maxLong, maxLat)
map = mapnik.Map(TILE_WIDTH, TILE_HEIGHT,
'+proj=longlat +datum=WGS84 +no_defs')
map.background = mapnik.Color("#7391ad")
# time.sleep (0.3)
# Set up the base layer
datasource = \
mapnik.SQLite(file=dbFile,
table="shapeEditor_baseMap",
key_field="id",
# srid=4326,
geometry_field="geometry",
extent=extentStr,
wkb_format="spatialite")
baseLayer = mapnik.Layer("baseLayer")
baseLayer.datasource = datasource
baseLayer.styles.append("baseLayerStyle")
rule = mapnik.Rule()
rule.symbols.append(mapnik.PolygonSymbolizer(mapnik.Color("#b5d19c")))
rule.symbols.append(mapnik.LineSymbolizer(mapnik.Color("#404040"),
0.2))
style = mapnik.Style()
style.rules.append(rule)
map.append_style("baseLayerStyle", style)
map.layers.append(baseLayer)
# Define the feature layer
geometryField = utils.calcGeometryField(shapefile.geom_type)
query = '( select ' + geometryField + \
' from "shapeEditor_feature" where ' + \
'shapefile_id = ' + str(shapefile.id) + ' ) as geom'
dbSettings = settings.DATABASES['default']
datasource = \
mapnik.PostGIS(user=dbSettings['USER'],
password=dbSettings['PASSWORD'],
dbname=dbSettings['NAME'],
table=query,
srid=4326,
geometry_field=geometryField,
geometry_table='"shapeEditor_feature"')
featureLayer = mapnik.Layer("featureLayer")
featureLayer.datasource = datasource
featureLayer.styles.append("featureLayerStyle")
rule = mapnik.Rule()
if shapefile.geom_type in ["Point", "MultiPoint"]:
rule.symbols.append(
mapnik.LineSymbolizer(mapnik.Color("#000000"), 0.5))
elif shapefile.geom_type in ["Polygon", "Multipolygon"]:
rule.symbols.append(
mapnik.PolygonSymbolizer(mapnik.Color("#b5d19c")))
rule.symbols.append(
mapnik.LineSymbolizer(mapnik.Color("#000000"), 1))
style = mapnik.Style()
style.rules.append(rule)
map.append_style("featureLayerStyle", style)
map.layers.append(featureLayer)
map.zoom_to_box(mapnik.Envelope(minLong, minLat, maxLong, maxLat))
image = mapnik.Image(TILE_WIDTH, TILE_HEIGHT)
mapnik.render(map, image)
imageData = image.tostring('png')
return HttpResponse(imageData, mimetype="image/png")
except:
traceback.print_exc()
return HttpResponse(" ")
def tile(request, version, shapefile_id, zoom, x, y):
try:
if version != "1.0":
raise Http404
try:
shapefile = Shapefile.objects.get(id=shapefile_id)
except Shapefile.DoesNotExist:
raise Http404
zoom = int(zoom)
x = int(x)
y = int(y)
if zoom < 0 or zoom > MAX_ZOOM_LEVEL:
raise Http404
xExtent = _unitsPerPixel(zoom) * TILE_WIDTH
yExtent = _unitsPerPixel(zoom) * TILE_HEIGHT
minLong = x * xExtent - 180.0
minLat = y * yExtent - 90.0
maxLong = minLong + xExtent
maxLat = minLat + yExtent
if (minLong < -180 or maxLong > 180 or
minLat < -90 or maxLat > 90):
raise Http404
map = mapnik.Map(TILE_WIDTH, TILE_HEIGHT,
"+proj=longlat +datum=WGS84")
map.background = mapnik.Color("#7391ad")
dbSettings = settings.DATABASES['default']
datasource = \
mapnik.PostGIS(user=dbSettings['USER'],
password=dbSettings['PASSWORD'],
dbname=dbSettings['NAME'],
table='"shapeEditor_basemap"',
srid=4326,
geometry_field="geometry",
geometry_table='"shapeEditor_basemap"')
baseLayer = mapnik.Layer("baseLayer")
baseLayer.datasource = datasource
baseLayer.styles.append("baseLayerStyle")
rule = mapnik.Rule()
rule.symbols.append(
mapnik.PolygonSymbolizer(mapnik.Color("#b5d19c")))
rule.symbols.append(
mapnik.LineSymbolizer(mapnik.Color("#404040"), 0.2))
style = mapnik.Style()
style.rules.append(rule)
map.append_style("baseLayerStyle", style)
map.layers.append(baseLayer)
geometryField = utils.calcGeometryField(shapefile.geom_type)
query = '(select ' + geometryField \
+ ' from "shapeEditor_feature" where' \
+ ' shapefile_id=' + str(shapefile.id) + ') as geom'
datasource = \
mapnik.PostGIS(user=dbSettings['USER'],
password=dbSettings['PASSWORD'],
dbname=dbSettings['NAME'],
table=query,
srid=4326,
geometry_field=geometryField,
geometry_table='"shapeEditor_feature"')
featureLayer = mapnik.Layer("featureLayer")
featureLayer.datasource = datasource
featureLayer.styles.append("featureLayerStyle")
rule = mapnik.Rule()
if shapefile.geom_type in ["Point", "MultiPoint"]:
rule.symbols.append(mapnik.PointSymbolizer())
elif shapefile.geom_type in ["LineString", "MultiLineString"]:
rule.symbols.append(
mapnik.LineSymbolizer(mapnik.Color("#000000"), 0.5))
elif shapefile.geom_type in ["Polygon", "MultiPolygon"]:
rule.symbols.append(
mapnik.PolygonSymbolizer(mapnik.Color("#f7edee")))
rule.symbols.append(
mapnik.LineSymbolizer(mapnik.Color("#000000"), 0.5))
style = mapnik.Style()
style.rules.append(rule)
map.append_style("featureLayerStyle", style)
map.layers.append(featureLayer)
map.zoom_to_box(mapnik.Envelope(minLong, minLat,
maxLong, maxLat))
image = mapnik.Image(TILE_WIDTH, TILE_HEIGHT)
mapnik.render(map, image)
imageData = image.tostring('png')
return HttpResponse(imageData, mimetype="image/png")
except:
traceboack.print_exc()
return HttpResponse("")
def tileLayer(request, version, shapefile_id, zoom, x, y):
try:
if version != "1.0":
raise Http404
try:
shapefile = Shapefile.objects.get(id=shapefile_id,
created_by=request.user)
except Shapefile.DoesNotExist:
raise Http404
zoom = int(zoom)
x = int(x)
y = int(y)
if zoom < 0 or zoom > MAX_ZOOM_LEVEL:
raise Http404
xExtent = _unitsPerPixel(zoom)
yExtent = _unitsPerPixel(zoom)
minLong = x * xExtent - 20037508.34
minLat = y * yExtent - 20037508.34
maxLong = minLong + xExtent
maxLat = minLat + yExtent
if (minLong < -20037508.34 or maxLong > 20037508.34
or minLat < -20037508.34 or maxLat > 20037508.34):
raise Http404
#create de mapnik.map object
map = mapnik.Map(
TILE_WIDTH, TILE_HEIGHT,
"+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +no_defs +over"
)
map.background = mapnik.Color("#f2f3f7")
#defining the feature layer
geometryField = utils.calcGeometryField(shapefile.geom_type)
field = "'NOM'"
field2 = "'CODE'"
query = '(select ' + geometryField + ', attribute_value->' + field + ' as label, id_relat from "shapefile_feature" where' + ' shapefile_id in (' + str(
shapefile.id) + ')) as geom'
## datasource = mapnik.SQLite(file='C:\mygeosite\sqlite3\sql3.db',
## table=query,
## srid=3857,
## geometry_field=geometryField)
## datasource = mapnik.PostGIS(user=dbSettings['USER'],
## password=dbSettings['PASSWORD'],
## dbname=dbSettings['NAME'],
## table=query,
## srid=3857,
## geometry_field=geometryField,
## simplify_geometries=True,
## geometry_table='"shapefile_feature"')
feature = Feature.objects.filter(shapefile__id=shapefile_id).geojson()
geoj = feature.geojson
datasource = mapnik.Ogr(layer_by_index=0, string=geoj)
##
featureLayer = mapnik.Layer("featureLayer")
featureLayer.srs = "+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +no_defs +over"
featureLayer.datasource = datasource
featureLayer.styles.append("featureLayerStyle")
#defining the feature layer styles
rule = mapnik.Rule()
if shapefile.geom_type in ["Point", "MultiPoint"]:
rule.symbols.append(mapnik.PointSymbolizer())
elif shapefile.geom_type in ["LineString", "MultiLineString"]:
rule.symbols.append(
mapnik.LineSymbolizer(mapnik.Color("#000000"), 0.5))
elif shapefile.geom_type in ["Polygon", "MultiPolygon"]:
rule.symbols.append(
mapnik.PolygonSymbolizer(mapnik.Color("#f7edee")))
rule.symbols.append(
mapnik.LineSymbolizer(mapnik.Color("#000000"), 0.5))
## label = mapnik.TextSymbolizer(mapnik.Expression('[label]'), 'DejaVu Sans Book', 10, mapnik.Color('black'))
## label.halo_fill = mapnik.Color('white')
## label.halo_radius = 4
## label.label_placement = mapnik.label_placement.INTERIOR_PLACEMENT
## label.allow_overlap = True
## label.avoid_edges = True
## rule.symbols.append(label)
style = mapnik.Style()
style.rules.append(rule)
#add new feature to the map
map.append_style("featureLayerStyle", style)
map.layers.append(featureLayer)
#rendering the map tile
mapnik.save_map(
map, "../tilestache/%s/%s.xml" %
(str(request.user), str(shapefile.filename)))
config = {
"cache": {
"name": "Test",
"path": "../tilestache/%s" % (request.user),
"umask": "0000",
"dirs": "portable"
},
"layers": {
shapefile.filename: {
"provider": {
"name":
"mapnik",
"mapfile":
"../tilestache/%s/%s.xml" %
(request.user, shapefile.filename)
},
"projection": "spherical mercator"
}
}
}
# like http://tile.openstreetmap.org/1/0/0.png
#coord = ModestMaps.Core.Coordinate(y, x, zoom)
path = "/%s/%s/%s/%s.png" % (shapefile.filename, zoom, x, y)
config = TileStache.Config.buildConfiguration(config)
#type, bytes = TileStache.getTile(config.layers[shapefile.filename], coord, 'png')
type, bytes = TileStache.requestHandler(config, path)
return HttpResponse(bytes, mimetype="image/png")
except:
traceback.print_exc()
return HttpResponse("")
def importData(shapefile, characterEncoding):
fd, fname = tempfile.mkstemp(suffix=".zip")
os.close(fd)
f = open(fname, "wb")
for chunk in shapefile.chunks():
f.write(chunk)
f.close()
if not zipfile.is_zipfile(fname):
os.remove(fname)
return "Not a valid zip archive."
zip = zipfile.ZipFile(fname)
required_suffixes = [".shp", ".shx", ".dbf", ".prj"]
hasSuffix = {}
for suffix in required_suffixes:
hasSuffix[suffix] = False
for info in zip.infolist():
extension = os.path.splitext(info.filename)[1].lower()
if extension in required_suffixes:
hasSuffix[extension] = True
for suffix in required_suffixes:
if not hasSuffix[suffix]:
zip.close()
os.remove(fname)
return "Archive missing required " + suffix + " file."
zip = zipfile.ZipFile(fname)
shapefileName = None
dirname = tempfile.mkdtemp()
for info in zip.infolist():
if info.filename.endswith(".shp"):
shapefileName = info.filename
dstFile = os.path.join(dirname, info.filename)
f = open(dstFile, "wb")
f.write(zip.read(info.filename))
f.close()
zip.close()
try:
datasource = ogr.Open(os.path.join(dirname, shapefileName))
layer = datasource.GetLayer(0)
shapefileOK = True
except:
traceback.print_exc()
shapefileOK = False
if not shapefileOK:
os.remove(fname)
shutil.rmtree(dirname)
return "Not a valid shapefile."
srcSpatialRef = layer.GetSpatialRef()
geometryType = layer.GetLayerDefn().GetGeomType()
geometryName = utils.ogrTypeToGeometryName(geometryType)
shapefile = Shapefile(filename=shapefileName,
srs_wkt=srcSpatialRef.ExportToWkt(),
geom_type=geometryName,
encoding=characterEncoding)
shapefile.save()
attributes = []
layerDef = layer.GetLayerDefn()
for i in range(layerDef.GetFieldCount()):
fieldDef = layerDef.GetFieldDefn(i)
attr = Attribute(shapefile=shapefile,
name=fieldDef.GetName(),
type=fieldDef.GetType(),
width=fieldDef.GetWidth(),
precision=fieldDef.GetPrecision())
attr.save()
attributes.append(attr)
dstSpatialRef = osr.SpatialReference()
dstSpatialRef.ImportFromEPSG(4326)
coordTransform = osr.CoordinateTransformation(srcSpatialRef, dstSpatialRef)
for i in range(layer.GetFeatureCount()):
srcFeature = layer.GetFeature(i)
srcGeometry = srcFeature.GetGeometryRef()
srcGeometry.Transform(coordTransform)
geometry = GEOSGeometry(srcGeometry.ExportToWkt())
geometry = utils.wrapGEOSGeometry(geometry)
geometryField = utils.calcGeometryField(geometryName)
args = {}
args['shapefile'] = shapefile
args[geometryField] = geometry
feature = Feature(**args)
feature.save()
for attr in attributes:
success, result = utils.getOGRFeatureAttribute(attr, srcFeature,
characterEncoding)
if not success:
os.remove(fname)
shutil.rmtree(dirname)
shapefile.delete()
return result
attrValue = AttributeValue(feature=feature,
attribute=attr,
value=result)
attrValue.save()
os.remove(fname)
shutil.rmtree(dirname)
return "Data imported!"
def exportData(shapefile):
""" Export the contents of the given shapefile.
'shapefile' is the Shapefile object to export.
We create a shapefile which holds the contents of the given shapefile,
then copy the shapefile into a temporary zip archive. Upon completion,
we return a Django HttpResponse object which can be used to send the
zipped shapefile to the user's web browser.
"""
# Create an OGR shapefile to hold the data we're exporting.
dstDir = tempfile.mkdtemp()
dstFile = str(os.path.join(dstDir, shapefile.filename))
srcSpatialRef = osr.SpatialReference()
srcSpatialRef.ImportFromEPSG(4326)
dstSpatialRef = osr.SpatialReference()
dstSpatialRef.ImportFromWkt(shapefile.srs_wkt)
coordTransform = osr.CoordinateTransformation(srcSpatialRef,
dstSpatialRef)
driver = ogr.GetDriverByName("ESRI Shapefile")
datasource = driver.CreateDataSource(dstFile)
layer = datasource.CreateLayer(str(shapefile.filename),
dstSpatialRef)
# Define the various fields which will hold our attributes.
for attr in shapefile.attribute_set.all():
field = ogr.FieldDefn(str(attr.name), attr.type)
field.SetWidth(attr.width)
field.SetPrecision(attr.precision)
layer.CreateField(field)
# Save the feature geometries and attributes into the shapefile.
geomField = utils.calcGeometryField(shapefile.geom_type)
for feature in shapefile.feature_set.all():
geometry = getattr(feature, geomField)
geometry = utils.unwrapGEOSGeometry(geometry)
dstGeometry = ogr.CreateGeometryFromWkt(geometry.wkt)
dstGeometry.Transform(coordTransform)
dstFeature = ogr.Feature(layer.GetLayerDefn())
dstFeature.SetGeometry(dstGeometry)
for attrValue in feature.attributevalue_set.all():
utils.setOGRFeatureAttribute(attrValue.attribute,
attrValue.value,
dstFeature,
shapefile.encoding)
layer.CreateFeature(dstFeature)
dstFeature.Destroy()
datasource.Destroy() # Close the file, write everything to disk.
# Compress the shapefile into a ZIP archive.
temp = tempfile.TemporaryFile()
zip = zipfile.ZipFile(temp, 'w', zipfile.ZIP_DEFLATED)
shapefileBase = os.path.splitext(dstFile)[0]
shapefileName = os.path.splitext(shapefile.filename)[0]
for fName in os.listdir(dstDir):
zip.write(os.path.join(dstDir, fName), fName)
zip.close()
# Clean up our temporary files.
shutil.rmtree(dstDir)
# Create an HttpResponse object to send the ZIP file back to the user's web
# browser.
f = FileWrapper(temp)
response = HttpResponse(f, content_type="application/zip")
response['Content-Disposition'] = "attachment; filename=" \
+ shapefileName + ".zip"
response['Content-Length'] = temp.tell()
temp.seek(0)
return response
def exportMultiLayersData(layers, encoding, EPSG, format):
try:
dstSpatialRef = osr.SpatialReference()
dstSpatialRef.ImportFromEPSG(EPSG)
driver = ogr.GetDriverByName(ogrDriver_dic[format])
dstDir = tempfile.mkdtemp()
dstFile = str(
os.path.join(dstDir, layers[0].name + filenameExt_dic[format]))
datasource = driver.CreateDataSource(dstFile)
for layer in layers:
vlayer = datasource.CreateLayer(str(layer.name), dstSpatialRef)
#retrive attributes
for attr in layer.attribute_set.all():
field = ogr.FieldDefn(str(attr.name), attr.type)
field.SetWidth(attr.width)
field.SetPrecision(attr.precision)
vlayer.CreateField(field)
#save features in shapefile
srcSpatialRef = osr.SpatialReference()
srcSpatialRef.ImportFromEPSG(3857)
coordTransform = osr.CoordinateTransformation(
srcSpatialRef, dstSpatialRef)
geomField = utils.calcGeometryField(layer.geom_type)
for feature in layer.feature_set.all().order_by('id_relat'):
if geometry:
geometry = getattr(feature, geomField)
geometry = utils.unwrapGEOSGeometry(geometry)
dstGeometry = ogr.CreateGeometryFromWkt(geometry.wkt)
dstGeometry.Transform(coordTransform)
else:
dstGeometry = None
#save attributes in the shapefile
dstFeature = ogr.Feature(vlayer.GetLayerDefn())
dstFeature.SetGeometry(dstGeometry)
for attrName, attrValue in feature.attribute_value.iteritems():
attribute = Attribute.objects.get(
name=str(attrName), shapefile=feature.shapefile)
utils.setOGRFeatureAttribute(attribute, attrValue,
dstFeature, encoding)
vlayer.CreateFeature(dstFeature)
dstFeature.Destroy()
datasource.Destroy()
#compress the shapefile
temp = tempfile.TemporaryFile()
zip = zipfile.ZipFile(temp, 'w', zipfile.ZIP_DEFLATED)
shapefileBase = os.path.splitext(dstFile)[0]
shapefileName = os.path.splitext(layer.name)[0]
for fName in os.listdir(dstDir):
zip.write(os.path.join(dstDir, fName), fName)
zip.close()
#delete temporary files
shutil.rmtree(dstDir)
#return the zip to user
f = FileWrapper(temp)
response = StreamingHttpResponse(f, content_type="application/zip")
response[
'Content-Disposition'] = "attachment; filename=" + shapefileName + fileExt_dic[
format]
response['Content-Length'] = temp.tell()
temp.seek(0)
return None, response
except BaseException, e:
return e.rstrip('\n'), None
def importexc(request):
if request.method == "GET":
form = ImportExcForm()
return render_to_response("importexc.html",
{'form' : form})
elif request.method == "POST":
form = ImportExcForm(request.POST,
request.FILES)
if form.is_valid():
excfile = request.FILES['import_exc']
character_encoding = request.POST['character_encoding']
excel_file = xlrd.open_workbook(file_contents=excfile.read())
filename=excel_file.sheet_names()
filename = filename[0]
dirpath = tempfile.mkdtemp()
sh = excel_file.sheet_by_index(0)
w = shapefile.Writer(shapefile.POINT)
w.field('Station','I')
w.field('Longitude', 'F')
w.field('Latitude', 'F')
w.field('Gravel_pc', 'F')
w.field('Sand_pc', 'F')
w.field('Mud_pc', 'F')
for rownum in range(sh.nrows):
if rownum == 0:
continue
else:
x_coord = sh.cell_value(rowx=rownum, colx=1)
y_coord = sh.cell_value(rowx=rownum, colx=2)
w.point(x_coord, y_coord)
w.record(Station=sh.cell_value(rowx=rownum, colx=0),Latitude=sh.cell_value(rowx=rownum, colx=2),
Longitude=sh.cell_value(rowx=rownum, colx=1),Gravel_pc=sh.cell_value(rowx=rownum, colx=3),
Sand_pc=sh.cell_value(rowx=rownum, colx=4),Mud_pc=sh.cell_value(rowx=rownum, colx=5))
w.save(os.path.join(dirpath,filename))
prj = open("%s.prj" % os.path.join(dirpath,filename), "w")
epsg = 'GEOGCS["WGS 84",DATUM["WGS_1984",SHEROID["WGS84",6378137,298.257223563]],PRIMEM["Greenwich",0],UNIT["degree",0.0174532925199433]]'
prj.write(epsg)
prj.close()
for item in os.listdir(dirpath):
if item.endswith(".shp"):
shapefileName = item
datasource = ogr.Open(os.path.join(dirpath, shapefileName))
layer = datasource.GetLayer(0)
layerDefinition = layer.GetLayerDefn()
srcSpatialRef = layer.GetSpatialRef()
geometryType = layer.GetLayerDefn().GetGeomType()
geometryName = utils.ogrTypeToGeometryName(geometryType)
shpfile = Shpfile(
filename=shapefileName,
srs_wkt=srcSpatialRef.ExportToWkt(),
geom_type=geometryName,
encoding=character_encoding
)
shpfile.save()
attributes = []
layerDef = layer.GetLayerDefn()
for i in range(layerDef.GetFieldCount()):
fieldDef = layerDef.GetFieldDefn(i)
attr = Attribute(
shpfile=shpfile,
name=fieldDef.GetName(),
type=fieldDef.GetType(),
width=fieldDef.GetWidth(),
)
attr.save()
attributes.append(attr)
for i in range(layer.GetFeatureCount()):
srcFeature = layer.GetFeature(i)
srcGeometry = srcFeature.GetGeometryRef()
geometry = GEOSGeometry(srcGeometry.ExportToWkt())
geometry = utils.wrapGEOSGeometry(geometry)
geometryField = utils.calcGeometryField(geometryName)
args = {}
args['shpfile'] = shpfile
args[geometryField] = geometry
feature = Feature(**args)
feature.save()
for attr in attributes:
success,result = utils.getOGRFeatureAttribute(
attr,
srcFeature,
character_encoding
)
if not success:
shutil.rmtree(dirpath)
shpfile.delete()
return result
attrValue = AttributeValue(
feature=feature,
attribute=attr,
value=result
)
attrValue.save()
shutil.rmtree(dirpath)
return HttpResponse("data imported!!")
def tileMap(request, version, ezmap_id, zoom, x, y):
try:
if version != "1.0":
raise Http404
try:
ezmap = EzMap.objects.get(id=ezmap_id)
layersMapOptions = LayerMapOptions.objects.filter(
ezmap=ezmap, visible=True).order_by('-position')
except Shapefile.DoesNotExist or Feature.DoesNotExist:
raise Http404
zoom = int(zoom)
x = int(x)
y = int(y)
if zoom < 0 or zoom > MAX_ZOOM_LEVEL:
raise Http404
xExtent = _unitsPerPixel(zoom)
yExtent = _unitsPerPixel(zoom)
minLong = x * xExtent - 20037508.34
minLat = y * yExtent - 20037508.34
maxLong = minLong + xExtent
maxLat = minLat + yExtent
if (minLong < -20037508.34 or maxLong > 20037508.34
or minLat < -20037508.34 or maxLat > 20037508.34):
raise Http404
if ezmap.changed:
#create de mapnik.map object
ezmap.changed = False
ezmap.save()
map = mapnik.Map(
TILE_WIDTH, TILE_HEIGHT,
"+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +no_defs +over"
)
#map.background = mapnik.Color("#ffffff")
#defining the feature layer
for layer in layersMapOptions.all():
label = LayerLabel.objects.get(layerMapOptions=layer)
for layerStyle in layer.styles.all():
shapefile = layer.layer
geometryField = utils.calcGeometryField(
shapefile.geom_type)
query = '(select ' + geometryField + ', attribute_value->\'' + label.field.name + '\' as label, id_relat from "shapefile_feature" where' + ' shapefile_id in (' + str(
shapefile.id) + ')) as geom'
## datasource = mapnik.SQLite(file='C:\mygeosite\sqlite3\sql3.db',
## table=query,
## srid=3857,
## geometry_field=geometryField,
## use_spatial_index=False)
datasource = mapnik.PostGIS(
user=dbSettings['USER'],
password=dbSettings['PASSWORD'],
dbname=dbSettings['NAME'],
table=query,
srid=3857,
geometry_field=geometryField,
geometry_table='"shapefile_feature"')
featureLayer = mapnik.Layer(
str(shapefile.filename) + str(layerStyle.id))
featureLayer.srs = "+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +no_defs +over"
featureLayer.datasource = datasource
featureLayer.styles.append(
str(shapefile.filename) + '_Style' +
str(layerStyle.id))
#defining the feature layer styles
rule = mapnik.Rule()
if shapefile.geom_type in ["Point", "MultiPoint"]:
s = mapnik.PointSymbolizer(
mapnik.PathExpression(str(layerStyle.iconName)))
s.allow_overlap = True
rule.symbols.append(s)
elif shapefile.geom_type in [
"LineString", "MultiLineString"
]:
rule.symbols.append(
mapnik.LineSymbolizer(
mapnik.Color(str(layerStyle.strokeColor)),
layerStyle.strokeWeight))
elif shapefile.geom_type in ["Polygon", "MultiPolygon"]:
p = mapnik.PolygonSymbolizer(
mapnik.Color(str((layerStyle.fillColor))))
p.fill_opacity = layerStyle.fillOpacity
rule.symbols.append(p)
rule.symbols.append(
mapnik.LineSymbolizer(
mapnik.Color(str(layerStyle.strokeColor)),
layerStyle.strokeWeight))
label = mapnik.TextSymbolizer(
mapnik.Expression('[label]'), 'DejaVu Sans Book',
label.font_size, mapnik.Color(str(label.font_color)))
label.halo_fill = mapnik.Color(str(label.halo_color))
label.halo_radius = int(label.halo_radius)
label.label_placement = mapnik.label_placement.INTERIOR_PLACEMENT
label.allow_overlap = False
label.avoid_edges = True
rule.symbols.append(label)
style = mapnik.Style()
style.rules.append(rule)
#add new feature to the map
map.append_style(
str(shapefile.filename) + '_Style' +
str(layerStyle.id), style)
map.layers.append(featureLayer)
#saving the map mapnik xml
mapnik.save_map(
map, "c:\\mygeosite\\tilestache\\%s\\%s.xml" %
(str(request.user), str(ezmap.map_name)))
config = {
"cache": {
"name": "test",
"path": "../tilestache/%s" % (request.user),
"umask": "0000",
"dirs": "portable"
},
"layers": {
ezmap.map_name: {
"provider": {
"name":
"mapnik",
"mapfile":
"../tilestache/%s/%s.xml" %
(request.user, ezmap.map_name)
},
"projection": "spherical mercator"
}
}
}
# like http://tile.openstreetmap.org/1/0/0.png
#coord = ModestMaps.Core.Coordinate(y, x, zoom)
path = "/%s/%s/%s/%s.png" % (ezmap.map_name, zoom, x, y)
config = TileStache.Config.buildConfiguration(config)
#type, bytes = TileStache.getTile(config.layers[shapefile.filename], coord, 'png')
type, bytes = TileStache.requestHandler(config, path)
return HttpResponse(bytes, mimetype="image/png")
except:
traceback.print_exc()
return HttpResponse("")
def tileFeature(request, version, shapefile_id, feature_id, zoom, x, y):
try:
if version != "1.0":
raise Http404
try:
shapefile = Shapefile.objects.get(id=shapefile_id, created_by=request.user)
except Shapefile.DoesNotExist:
raise Http404
zoom = int(zoom)
x = int(x)
y = int(y)
if zoom < 0 or zoom > MAX_ZOOM_LEVEL:
raise Http404
xExtent = _unitsPerPixel(zoom)
yExtent = _unitsPerPixel(zoom)
minLong = x * xExtent - 20037508.34
minLat = y * yExtent - 20037508.34
maxLong = minLong + xExtent
maxLat = minLat + yExtent
if (minLong < -20037508.34 or maxLong > 20037508.34 or minLat < -20037508.34 or maxLat > 20037508.34):
raise Http404
#create de mapnik.map object
map = mapnik.Map(TILE_WIDTH, TILE_HEIGHT, "+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +no_defs +over")
map.background = mapnik.Color("#fff")
#defining the feature layer
geometryField = utils.calcGeometryField(shapefile.geom_type)
query = '(select ' + geometryField +', id, id_relat as label from "layers_feature" WHERE shapefile_id = ' + str(shapefile.id) + ' AND id = ' + str(feature_id) + ') as geom'
datasource = mapnik.PostGIS(user=dbSettings['USER'],
password=dbSettings['PASSWORD'],
dbname=dbSettings['NAME'],
port=dbSettings['PORT'],
table=query,
srid=3857,
geometry_field=geometryField,
simplify_geometries=True,
geometry_table='"layers_feature"')
featureLayer = mapnik.Layer("featureLayer")
featureLayer.srs = "+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +no_defs +over"
featureLayer.datasource = datasource
featureLayer.styles.append("featureLayerStyle")
#defining the feature layer styles
rule = mapnik.Rule()
if shapefile.geom_type in ["Point", "3D Point", "MultiPoint", "3D MultiPoint"]:
rule.symbols.append(mapnik.PointSymbolizer())
elif shapefile.geom_type in ["LineString", "3D LineString", "MultiLineString", "3D MultiLineString"]:
rule.symbols.append(mapnik.LineSymbolizer(mapnik.Color("#000000"), 0.5))
elif shapefile.geom_type in ["Polygon", "3D Polygon", "MultiPolygon", "3D MultiPolygon"]:
rule.symbols.append(mapnik.PolygonSymbolizer(mapnik.Color("#f7edee")))
rule.symbols.append(mapnik.LineSymbolizer(mapnik.Color("#000000"), 0.5))
style = mapnik.Style()
style.rules.append(rule)
map.append_style("featureLayerStyle", style)
label_rule = mapnik.Rule()
label = mapnik.TextSymbolizer(mapnik.Expression('[label]'), 'DejaVu Sans Book', 10, mapnik.Color('black'))
label.halo_radius = 4
label.allow_overlap = False
label.avoid_edges = True
label_rule.symbols.append(label)
label_style = mapnik.Style()
label_style.rules.append(label_rule)
featureLayer.styles.append("featureLayerStyle_label")
#add label to the map
map.append_style("featureLayerStyle_label", label_style)
#add new feature to the map
map.layers.append(featureLayer)
#rendering the map tile
mapnik_xml_path = "../tilestache/%s/layers/vector/lightViewer/%s.xml" % (str(request.user), str(shapefile.name))
mapnik.save_map(map, mapnik_xml_path)
config = {
"cache": {
"name": "Test",
"path": "../tilestache/%s" % (request.user),
"umask": "0000",
"dirs": "portable"},
"layers": {
shapefile.name: {
"provider": {"name": "mapnik", "mapfile": mapnik_xml_path},
"metatile": {
"rows": 2,
"columns": 2,
"buffer": 64
},
"projection": "spherical mercator",
"write cache": False
}
}
}
path = "/%s/%s/%s/%s.png" % (shapefile.name,zoom,x,y)
config = TileStache.Config.buildConfiguration(config)
type, bytes = TileStache.requestHandler(config, path)
return HttpResponse(bytes, content_type="image/png")
except:
traceback.print_exc()
return HttpResponse("")
def importData(shapefile, characterEncoding):
fd,fname = tempfile.mkstemp(suffix=".zip")
os.close(fd)
f = open(fname, "wb")
for chunk in shapefile.chunks():
f.write(chunk)
f.close()
if not zipfile.is_zipfile(fname):
os.remove(fname)
return "Not a valid zip archive."
zip = zipfile.ZipFile(fname)
required_suffixes = [".shp", ".shx", ".dbf", ".prj"]
hasSuffix = {}
for suffix in required_suffixes:
hasSuffix[suffix] = False
for info in zip.infolist():
extension = os.path.splitext(info.filename)[1].lower()
if extension in required_suffixes:
hasSuffix[extension] = True
for suffix in required_suffixes:
if not hasSuffix[suffix]:
zip.close()
os.remove(fname)
return "Archive missing required "+suffix+" file."
zip = zipfile.ZipFile(fname)
shapefileName = None
dirname = tempfile.mkdtemp()
for info in zip.infolist():
if info.filename.endswith(".shp"):
shapefileName = info.filename
dstFile = os.path.join(dirname, info.filename)
f = open(dstFile, "wb")
f.write(zip.read(info.filename))
f.close()
zip.close()
try:
datasource = ogr.Open(os.path.join(dirname, shapefileName))
layer = datasource.GetLayer(0)
shapefileOK = True
except:
traceback.print_exc()
shapefileOK = False
if not shapefileOK:
os.remove(fname)
shutil.rmtree(dirname)
return "Not a valid shapefile."
srcSpatialRef = layer.GetSpatialRef()
geometryType = layer.GetLayerDefn().GetGeomType()
geometryName = utils.ogrTypeToGeometryName(geometryType)
shapefile = Shapefile(
filename=shapefileName,
srs_wkt=srcSpatialRef.ExportToWkt(),
geom_type=geometryName,
encoding=characterEncoding
)
shapefile.save()
attributes = []
layerDef = layer.GetLayerDefn()
for i in range(layerDef.GetFieldCount()):
fieldDef = layerDef.GetFieldDefn(i)
attr = Attribute(
shapefile=shapefile,
name=fieldDef.GetName(),
type=fieldDef.GetType(),
width=fieldDef.GetWidth(),
precision=fieldDef.GetPrecision()
)
attr.save()
attributes.append(attr)
dstSpatialRef = osr.SpatialReference()
dstSpatialRef.ImportFromEPSG(4326)
coordTransform = osr.CoordinateTransformation(srcSpatialRef,
dstSpatialRef)
for i in range(layer.GetFeatureCount()):
srcFeature = layer.GetFeature(i)
srcGeometry = srcFeature.GetGeometryRef()
srcGeometry.Transform(coordTransform)
geometry = GEOSGeometry(srcGeometry.ExportToWkt())
geometry = utils.wrapGEOSGeometry(geometry)
geometryField = utils.calcGeometryField(geometryName)
args = {}
args['shapefile'] = shapefile
args[geometryField] = geometry
feature = Feature(**args)
feature.save()
for attr in attributes:
success,result = utils.getOGRFeatureAttribute(
attr,
srcFeature,
characterEncoding
)
if not success:
os.remove(fname)
shutil.rmtree(dirname)
shapefile.delete()
return result
attrValue = AttributeValue(
feature=feature,
attribute=attr,
value=result
)
attrValue.save()
os.remove(fname)
shutil.rmtree(dirname)
return "Data imported!"
def tile(request, version, shapefile_id, zoom, x, y):
""" Return a single Tile resource for our Tile Map Server.
This returns the rendered map tile for a given zoom level, x and y
coordinate.
"""
try:
# Parse the supplied parameters to see which area of the map to
# generate.
if version != "1.0":
raise Http404
shapefile = Shapefile.objects.get(id=shapefile_id)
if shapefile == None:
raise Http404
geometryField = utils.calcGeometryField(shapefile.geom_type)
geometryType = utils.calcGeometryFieldType(shapefile.geom_type)
zoom = int(zoom)
x = int(x)
y = int(y)
if zoom < 0 or zoom > MAX_ZOOM_LEVEL:
raise Http404
xExtent = _unitsPerPixel(zoom) * TILE_WIDTH
yExtent = _unitsPerPixel(zoom) * TILE_HEIGHT
minLong = x * xExtent - 180.0
minLat = y * yExtent - 90.0
maxLong = minLong + xExtent
maxLat = minLat + yExtent
if (minLong < -180 or maxLong > 180 or
minLat < -90 or maxLat > 90):
print "Map extent out of bounds:",minLong,minLat,maxLong,maxLat
raise Http404
# Prepare to display the map.
map = mapnik.Map(TILE_WIDTH, TILE_HEIGHT,
"+proj=longlat +datum=WGS84")
map.background = mapnik.Color("#7391ad")
dbSettings = settings.DATABASES['default']
# Setup our base layer, which displays the base map.
datasource = mapnik.PostGIS(user=dbSettings['USER'],
password=dbSettings['PASSWORD'],
dbname=dbSettings['NAME'],
table='"shapeEditor_basemap"',
srid=4326,
geometry_field="geometry",
geometry_table='"shapeEditor_basemap"')
baseLayer = mapnik.Layer("baseLayer")
baseLayer.datasource = datasource
baseLayer.styles.append("baseLayerStyle")
rule = mapnik.Rule()
rule.symbols.append(
mapnik.PolygonSymbolizer(mapnik.Color("#b5d19c")))
rule.symbols.append(
mapnik.LineSymbolizer(mapnik.Color("#404040"), 0.2))
style = mapnik.Style()
style.rules.append(rule)
map.append_style("baseLayerStyle", style)
map.layers.append(baseLayer)
# Setup our feature layer, which displays the features from the
# shapefile.
query = '(select ' + geometryField + ' from "shapeEditor_feature" where shapefile_id=' + str(shapefile.id) + ') as geom'
print "QUERY: " + query +":" + geometryField+":" + geometryType
datasource = mapnik.PostGIS(user=dbSettings['USER'],
password=dbSettings['PASSWORD'],
dbname=dbSettings['NAME'],
table=query,
srid=4326,
geometry_field=geometryField,
geometry_table='"shapeEditor_feature"')
print "DATA SOURCE IS " + str(datasource)
featureLayer = mapnik.Layer("featureLayer")
featureLayer.datasource = datasource
featureLayer.styles.append("featureLayerStyle")
rule = mapnik.Rule()
if geometryType in ["Point", "MultiPoint"]:
rule.symbols.append(mapnik.PointSymbolizer())
elif geometryType in ["LineString", "MultiLineString"]:
rule.symbols.append(
mapnik.LineSymbolizer(mapnik.Color("#000000"), 0.5))
elif geometryType in ["Polygon", "MultiPolygon"]:
rule.symbols.append(
mapnik.PolygonSymbolizer(mapnik.Color("#f7edee")))
rule.symbols.append(
mapnik.LineSymbolizer(mapnik.Color("#000000"), 0.5))
style = mapnik.Style()
style.rules.append(rule)
map.append_style("featureLayerStyle", style)
map.layers.append(featureLayer)
# Finally, render the map.
map.zoom_to_box(mapnik.Envelope(minLong, minLat, maxLong, maxLat))
image = mapnik.Image(TILE_WIDTH, TILE_HEIGHT)
mapnik.render(map, image)
imageData = image.tostring('png')
return HttpResponse(imageData, mimetype="image/png")
except:
traceback.print_exc()
raise
