def __init__(self):
BaseWMSFactory.__init__(self)
for data in datas:
name = data['name']
title = data['long_name']
data = base_path+"/ecohealth/"+name+'.asc'
layer = mapnik.Layer(name,"+init=epsg:4326")
layer.datasource = mapnik.Gdal(file=str(data),band=1)
layer.title = title
layer.queryable = True
layer.wms_srs = None
style = mapnik.Style()
rule = mapnik.Rule()
sym = mapnik.RasterSymbolizer()
sym.colorizer = mapnik.RasterColorizer(mapnik.COLORIZER_LINEAR, mapnik.Color("transparent"))
scale = getEcohealthScale(name)
for color in scale:
sym.colorizer.add_stop(color['stop'], mapnik.Color(*color['color']))
rule.symbols.append(sym)
style.rules.append(rule)
self.register_style(name,style)
self.register_layer(layer, name, (name,))
self.finalize()
def test_raster_warping_does_not_overclip_source():
lyrSrs = "+init=epsg:32630"
mapSrs = '+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs'
lyr = mapnik.Layer('dataraster', lyrSrs)
if 'gdal' in mapnik.DatasourceCache.plugin_names():
lyr.datasource = mapnik.Gdal(
file = '../data/raster/dataraster.tif',
band = 1,
)
sym = mapnik.RasterSymbolizer()
sym.colorizer = mapnik.RasterColorizer(mapnik.COLORIZER_DISCRETE, mapnik.Color(255,255,0))
rule = mapnik.Rule()
rule.symbols.append(sym)
style = mapnik.Style()
style.rules.append(rule)
_map = mapnik.Map(256,256, mapSrs)
_map.background=mapnik.Color('white')
_map.append_style('foo', style)
lyr.styles.append('foo')
_map.layers.append(lyr)
_map.zoom_to_box(mapnik.Box2d(3,42,4,43))
im = mapnik.Image(_map.width,_map.height)
mapnik.render(_map, im)
expected_file = './images/support/raster_warping_does_not_overclip_source.png'
actual_file = '/tmp/' + os.path.basename(expected_file)
im.save(actual_file,'png32')
if not os.path.exists(expected_file) or os.environ.get('UPDATE'):
im.save(expected_file,'png32')
actual = mapnik.Image.open(actual_file)
expected = mapnik.Image.open(expected_file)
eq_(actual.tostring('png32'),expected.tostring('png32'), 'failed comparing actual (%s) and expected (%s)' % (actual_file,expected_file))
def get_raster_map():
m = mapnik.Map(map_width, map_height)
m.background = mapnik.Color('black')
m.srs = map_srs
s = mapnik.Style()
r = mapnik.Rule()
raster_symbolizer = mapnik.RasterSymbolizer()
raster_symbolizer.colorizer = mapnik.RasterColorizer(mapnik.COLORIZER_LINEAR, mapnik.Color("transparent"))
raster_symbolizer.colorizer.add_stop(0.0, mapnik.COLORIZER_LINEAR, mapnik.Color("black"))
raster_symbolizer.colorizer.add_stop(1.0, mapnik.COLORIZER_LINEAR, mapnik.Color("white"))
r.symbols.append(raster_symbolizer)
s.rules.append(r)
m.append_style('raster_style', s)
lyr = mapnik.Layer('urban')
lyr.datasource = mapnik.Gdal(base='./ne_110m_admin_0_countries', file='urban19901.tif', band=1)
lyr.styles.append('raster_style')
m.layers.append(lyr)
return m
def _addStyleToMap(self, m, layerSrs, colorizer=None, band=-1, extent=None,
composite=None, nodata=None):
"""
Add a mapik raster symbolizer to a map.
:param m: mapnik map.
:param layerSrs: the layer projection
:param colorizer: a mapnik colorizer.
:param band: an integer band number. -1 for default.
:param extent: the extent to use for the mapnik layer.
:param composite: the composite operation to use. This is one of
mapnik.CompositeOp.xxx, typically lighten or multiply.
:param nodata: the value to use for missing data or None to use all
data.
"""
styleName = 'Raster Style'
if band != -1:
styleName += ' ' + str(band)
rule = mapnik.Rule()
sym = mapnik.RasterSymbolizer()
if colorizer is not None:
sym.colorizer = colorizer
rule.symbols.append(sym)
style = mapnik.Style()
style.rules.append(rule)
if composite is not None:
style.comp_op = composite
m.append_style(styleName, style)
lyr = mapnik.Layer('layer')
lyr.srs = layerSrs
lyr.datasource = mapnik.Gdal(
base=None, file=self._path, band=band, extent=extent, nodata=nodata)
lyr.styles.append(styleName)
m.layers.append(lyr)
def to_mapnik(self):
sym = mapnik.RasterSymbolizer()
sym.opacity = self.opacity
sym.mode = self.mode or sym.mode
sym.scaling = self.scaling or sym.scaling
return sym
def style_map(self, Map):
style = mapnik.Style()
rule = mapnik.Rule()
sym = mapnik.RasterSymbolizer()
sym.opacity = self.opacity
colorizer = mapnik.RasterColorizer(mapnik.COLORIZER_DISCRETE,
mapnik.Color('white'))
# colorizer.epsilon = 0.001
if self.colormap:
for stop in self.colormap:
colorizer.add_stop(stop['quantity'],
mapnik.Color(stop['color'].encode('ascii')))
sym.colorizer = colorizer
rule.symbols.append(sym)
style.rules.append(rule)
Map.append_style('Raster Style', style)
lyr = mapnik.Layer('GDAL Layer from TIFF', self.layer_srs)
lyr.datasource = mapnik.Gdal(base=os.path.dirname(self.vrt_path),
file=os.path.basename(self.vrt_path),
band=self.mapnik_band)
lyr.styles.append('Raster Style')
Map.layers.append(lyr)
return Map
def test_raster_warping():
lyrSrs = "+init=epsg:32630"
mapSrs = '+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs'
lyr = mapnik.Layer('dataraster', lyrSrs)
if 'gdal' in mapnik.DatasourceCache.plugin_names():
lyr.datasource = mapnik.Gdal(
file='../data/raster/dataraster.tif',
band=1,
)
sym = mapnik.RasterSymbolizer()
sym.colorizer = mapnik.RasterColorizer(mapnik.COLORIZER_DISCRETE,
mapnik.Color(255, 255, 0))
rule = mapnik.Rule()
rule.symbols.append(sym)
style = mapnik.Style()
style.rules.append(rule)
_map = mapnik.Map(256, 256, mapSrs)
_map.append_style('foo', style)
lyr.styles.append('foo')
_map.layers.append(lyr)
map_proj = mapnik.Projection(mapSrs)
layer_proj = mapnik.Projection(lyrSrs)
prj_trans = mapnik.ProjTransform(map_proj, layer_proj)
_map.zoom_to_box(prj_trans.backward(lyr.envelope()))
im = mapnik.Image(_map.width, _map.height)
mapnik.render(_map, im)
imdata = im.tostring()
assert contains_word('\xff\xff\x00\xff', imdata)
def test_raster_with_alpha_blends_correctly_with_background():
WIDTH = 500
HEIGHT = 500
map = mapnik.Map(WIDTH, HEIGHT)
WHITE = mapnik.Color(255, 255, 255)
map.background = WHITE
style = mapnik.Style()
rule = mapnik.Rule()
symbolizer = mapnik.RasterSymbolizer()
symbolizer.scaling = mapnik.scaling_method.BILINEAR
rule.symbols.append(symbolizer)
style.rules.append(rule)
map.append_style('raster_style', style)
map_layer = mapnik.Layer('test_layer')
filepath = '../data/raster/white-alpha.png'
if 'gdal' in mapnik.DatasourceCache.plugin_names():
map_layer.datasource = mapnik.Gdal(file=filepath)
map_layer.styles.append('raster_style')
map.layers.append(map_layer)
map.zoom_all()
mim = mapnik.Image(WIDTH, HEIGHT)
mapnik.render(map, mim)
imdata = mim.tostring()
# All white is expected
eq_(get_unique_colors(mim),['rgba(254,254,254,255)'])
def test_raster_warping_does_not_overclip_source():
lyrSrs = "+init=epsg:32630"
mapSrs = '+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs'
lyr = mapnik.Layer('dataraster', lyrSrs)
if 'gdal' in mapnik.DatasourceCache.plugin_names():
lyr.datasource = mapnik.Gdal(
file='../data/raster/dataraster.tif',
band=1,
)
sym = mapnik.RasterSymbolizer()
sym.colorizer = mapnik.RasterColorizer(mapnik.COLORIZER_DISCRETE,
mapnik.Color(255, 255, 0))
rule = mapnik.Rule()
rule.symbols.append(sym)
style = mapnik.Style()
style.rules.append(rule)
_map = mapnik.Map(256, 256, mapSrs)
_map.background = mapnik.Color('white')
_map.append_style('foo', style)
lyr.styles.append('foo')
_map.layers.append(lyr)
_map.zoom_to_box(mapnik.Box2d(3, 42, 4, 43))
im = mapnik.Image(_map.width, _map.height)
mapnik.render(_map, im)
assert im.view(0, 200, 1, 1).tostring() == '\xff\xff\x00\xff'
def rgb_style():
rgb_symb = mapnik.RasterSymbolizer()
rgb_rule = mapnik.Rule()
rgb_rule.symbols.append(rgb_symb)
rgb_style = mapnik.Style()
rgb_style.rules.append(rgb_rule)
return rgb_style
def __init__(self):
BaseWMSFactory.__init__(self)
layer = mapnik.Layer('TOP', modis_srs)
layer.datasource = mapnik.Gdal(file=str(data),band=1)
layer.title = "Modis VI Layer"
layer.queryable = True
layer.wms_srs = None
style = mapnik.Style()
rule = mapnik.Rule()
sym = mapnik.RasterSymbolizer()
sym.colorizer = mapnik.RasterColorizer(mapnik.COLORIZER_DISCRETE, mapnik.Color("transparent"))
scale = getModisScale(product)
for color in scale:
sym.colorizer.add_stop(color['stop'], mapnik.Color(*color['color']))
rule.symbols.append(sym)
style.rules.append(rule)
self.register_style('modis_style', style)
self.register_layer(layer, "modis_style",("modis_style",))
layer = mapnik.Layer('ocean_mask')
layer.datasource = mapnik.Shapefile(file=str("/data/health/data1/web/data/shapes/50m_ocean.shp"))
layer.queryable = True
layer.wms_srs = None
style = mapnik.Style()
rule = mapnik.Rule()
poly_sym = mapnik.PolygonSymbolizer(mapnik.Color('#50649B'))
rule.symbols.append(poly_sym)
style.rules.append(rule)
self.register_style('mask_style', style)
self.register_layer(layer, "mask_style",("mask_style",))
def create_style(self):
symbolizer = mapnik.RasterSymbolizer()
symbolizer.colorizer = self.create_colorizer()
rule = mapnik.Rule()
rule.symbols.append(symbolizer)
style = mapnik.Style()
style.comp_op = mapnik.CompositeOp.plus
style.rules.append(rule)
return style
def test_multi_tile_policy():
srs = '+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs'
lyr = mapnik.Layer('raster')
if 'raster' in mapnik.DatasourceCache.plugin_names():
lyr.datasource = mapnik.Raster(
file = '../data/raster_tiles/${x}/${y}.tif',
lox = -180,
loy = -90,
hix = 180,
hiy = 90,
multi = 1,
tile_size = 256,
x_width = 2,
y_width = 2
)
lyr.srs = srs
_map = mapnik.Map(256, 256, srs)
style = mapnik.Style()
rule = mapnik.Rule()
sym = mapnik.RasterSymbolizer()
rule.symbols.append(sym)
style.rules.append(rule)
_map.append_style('foo', style)
lyr.styles.append('foo')
_map.layers.append(lyr)
_map.zoom_to_box(lyr.envelope())
im = mapnik.Image(_map.width, _map.height)
mapnik.render(_map, im)
save_data('test_multi_tile_policy.png', im.tostring('png'))
# test green chunk
eq_(im.view(0,64,1,1).tostring(), '\x00\xff\x00\xff')
eq_(im.view(127,64,1,1).tostring(), '\x00\xff\x00\xff')
eq_(im.view(0,127,1,1).tostring(), '\x00\xff\x00\xff')
eq_(im.view(127,127,1,1).tostring(), '\x00\xff\x00\xff')
# test blue chunk
eq_(im.view(128,64,1,1).tostring(), '\x00\x00\xff\xff')
eq_(im.view(255,64,1,1).tostring(), '\x00\x00\xff\xff')
eq_(im.view(128,127,1,1).tostring(), '\x00\x00\xff\xff')
eq_(im.view(255,127,1,1).tostring(), '\x00\x00\xff\xff')
# test red chunk
eq_(im.view(0,128,1,1).tostring(), '\xff\x00\x00\xff')
eq_(im.view(127,128,1,1).tostring(), '\xff\x00\x00\xff')
eq_(im.view(0,191,1,1).tostring(), '\xff\x00\x00\xff')
eq_(im.view(127,191,1,1).tostring(), '\xff\x00\x00\xff')
# test magenta chunk
eq_(im.view(128,128,1,1).tostring(), '\xff\x00\xff\xff')
eq_(im.view(255,128,1,1).tostring(), '\xff\x00\xff\xff')
eq_(im.view(128,191,1,1).tostring(), '\xff\x00\xff\xff')
eq_(im.view(255,191,1,1).tostring(), '\xff\x00\xff\xff')
def test_raster_symbolizer():
s = mapnik.RasterSymbolizer()
eq_(s.comp_op, mapnik.CompositeOp.src_over) # note: mode is deprecated
eq_(s.scaling, mapnik.scaling_method.NEAR)
eq_(s.opacity, 1.0)
eq_(s.colorizer, None)
eq_(s.filter_factor, -1)
eq_(s.mesh_size, 16)
eq_(s.premultiplied, None)
s.premultiplied = True
eq_(s.premultiplied, True)
def test_dataraster_coloring():
srs = '+init=epsg:32630'
lyr = mapnik.Layer('dataraster')
if 'gdal' in mapnik.DatasourceCache.plugin_names():
lyr.datasource = mapnik.Gdal(
file='../data/raster/dataraster.tif',
band=1,
)
lyr.srs = srs
_map = mapnik.Map(256, 256, srs)
style = mapnik.Style()
rule = mapnik.Rule()
sym = mapnik.RasterSymbolizer()
# Assigning a colorizer to the RasterSymbolizer tells the later
# that it should use it to colorize the raw data raster
colorizer = mapnik.RasterColorizer(mapnik.COLORIZER_DISCRETE,
mapnik.Color("transparent"))
for value, color in [
(0, "#0044cc"),
(10, "#00cc00"),
(20, "#ffff00"),
(30, "#ff7f00"),
(40, "#ff0000"),
(50, "#ff007f"),
(60, "#ff00ff"),
(70, "#cc00cc"),
(80, "#990099"),
(90, "#660066"),
(200, "transparent"),
]:
colorizer.add_stop(value, mapnik.Color(color))
sym.colorizer = colorizer
rule.symbols.append(sym)
style.rules.append(rule)
_map.append_style('foo', style)
lyr.styles.append('foo')
_map.layers.append(lyr)
_map.zoom_to_box(lyr.envelope())
im = mapnik.Image(_map.width, _map.height)
mapnik.render(_map, im)
expected_file = './images/support/dataraster_coloring.png'
actual_file = '/tmp/' + os.path.basename(expected_file)
im.save(actual_file, 'png32')
if not os.path.exists(expected_file) or os.environ.get('UPDATE'):
im.save(expected_file, 'png32')
actual = mapnik.Image.open(actual_file)
expected = mapnik.Image.open(expected_file)
eq_(
actual.tostring('png32'), expected.tostring('png32'),
'failed comparing actual (%s) and expected (%s)' %
(actual_file, expected_file))
def _get_map(self, normalized_args):
"""Return the Mapnik object (with hardcoded symbology/rule)."""
# miss:
# bgcolor
# exceptions
projection = parse_projection(normalized_args)
# validate projection
size = parse_size(normalized_args)
mp = mapnik.Map(size.width, size.height, "+init=" + projection)
# TODO: how do we manage style ? just have hardcoded
# style list in a dir ?
s = mapnik.Style()
r = mapnik.Rule()
r.symbols.append(mapnik.RasterSymbolizer())
s.rules.append(r)
r.symbols.append(mapnik.PointSymbolizer())
s.rules.append(r)
polygon_symbolizer = mapnik.PolygonSymbolizer()
polygon_symbolizer.fill = mapnik.Color("black")
polygon_symbolizer.fill_opacity = 0
r.symbols.append(polygon_symbolizer)
line_symbolizer = mapnik.LineSymbolizer()
line_symbolizer.stroke = mapnik.Color("black")
line_symbolizer.stroke_width = 1.0
r.symbols.append(line_symbolizer)
s.rules.append(r)
style_name = "My Style"
mp.append_style(style_name, s)
# TODO read the background set it
# mp.background_color = 'steelblue'
layer_names = parse_layers(normalized_args)
for layer_name in layer_names:
try:
layer = geofile.load(layer_name)
except FileNotFoundError as e:
abort(404, e.strerror)
mapnik_layer = layer.as_mapnik_layer()
mapnik_layer.styles.append(style_name)
mp.layers.append(mapnik_layer)
return mp
def test_dataraster_coloring():
srs = '+init=epsg:32630'
lyr = mapnik.Layer('dataraster')
if 'gdal' in mapnik.DatasourceCache.plugin_names():
lyr.datasource = mapnik.Gdal(
file='../data/raster/dataraster.tif',
band=1,
)
lyr.srs = srs
_map = mapnik.Map(256, 256, srs)
style = mapnik.Style()
rule = mapnik.Rule()
sym = mapnik.RasterSymbolizer()
# Assigning a colorizer to the RasterSymbolizer tells the later
# that it should use it to colorize the raw data raster
sym.colorizer = mapnik.RasterColorizer(mapnik.COLORIZER_DISCRETE,
mapnik.Color("transparent"))
for value, color in [
(0, "#0044cc"),
(10, "#00cc00"),
(20, "#ffff00"),
(30, "#ff7f00"),
(40, "#ff0000"),
(50, "#ff007f"),
(60, "#ff00ff"),
(70, "#cc00cc"),
(80, "#990099"),
(90, "#660066"),
(200, "transparent"),
]:
sym.colorizer.add_stop(value, mapnik.Color(color))
rule.symbols.append(sym)
style.rules.append(rule)
_map.append_style('foo', style)
lyr.styles.append('foo')
_map.layers.append(lyr)
_map.zoom_to_box(lyr.envelope())
im = mapnik.Image(_map.width, _map.height)
mapnik.render(_map, im)
# save a png somewhere so we can see it
save_data('test_dataraster_coloring.png', im.tostring('png'))
imdata = im.tostring()
# we have some values in the [20,30) interval so check that they're colored
assert contains_word('\xff\xff\x00\xff', imdata)
def test_raster_with_alpha_blends_correctly_with_background():
WIDTH = 500
HEIGHT = 500
map = mapnik.Map(WIDTH, HEIGHT)
WHITE = mapnik.Color(255, 255, 255)
map.background = WHITE
style = mapnik.Style()
rule = mapnik.Rule()
symbolizer = mapnik.RasterSymbolizer()
#XXX: This fixes it, see http://trac.mapnik.org/ticket/759#comment:3
# (and remove comment when this test passes)
#symbolizer.scaling="bilinear_old"
rule.symbols.append(symbolizer)
style.rules.append(rule)
map.append_style('raster_style', style)
map_layer = mapnik.Layer('test_layer')
filepath = '../data/raster/white-alpha.png'
if 'gdal' in mapnik.DatasourceCache.instance().plugin_names():
map_layer.datasource = mapnik.Gdal(file=filepath)
map_layer.styles.append('raster_style')
map.layers.append(map_layer)
map.zoom_all()
mim = mapnik.Image(WIDTH, HEIGHT)
mapnik.render(map, mim)
save_data(
'test_raster_with_alpha_blends_correctly_with_background.png',
mim.tostring('png'))
imdata = mim.tostring()
# All white is expected
assert contains_word('\xff\xff\xff\xff', imdata)
def render_static(request,
height=None,
width=None,
format='png',
background='satellite',
bounds=None,
center=None,
render_srid=3857):
# width and height
width = int(width)
height = int(height)
if width > settings.MAX_IMAGE_DIMENSION or \
height > settings.MAX_IMAGE_DIMENSION or \
width <= 1 or height <= 1:
logging.debug("Invalid size")
return HttpResponseBadRequest(
"Invalid image size, both dimensions must be in range %i-%i" %
(1, settings.MAX_IMAGE_DIMENSION))
# image format
if format not in IMAGE_FORMATS:
logging.error("unknown image format %s" % format)
return HttpResponseBadRequest(
"Unknown image format, available formats: " +
", ".join(IMAGE_FORMATS))
if format.startswith('png'):
mimetype = 'image/png'
elif format.startswith('jpeg'):
mimetype = 'image/jpeg'
# bounds
bounds_box = None
if bounds:
bounds_components = bounds.split(',')
if len(bounds_components) != 4:
return HttpResponseBadRequest(
"Invalid bounds, must be 4 , separated numbers")
bounds_components = [float(f) for f in bounds_components]
if not (-180 < bounds_components[0] <
180) or not (-180 < bounds_components[2] < 180):
logging.error("x out of range %f or %f" %
(bounds_components[0], bounds_components[2]))
return HttpResponseBadRequest(
"x out of range %f or %f" %
(bounds_components[0], bounds_components[2]))
if not (-90 < bounds_components[1] <
90) or not (-90 < bounds_components[3] < 90):
logging.error("y out of range %f or %f" %
(bounds_components[1], bounds_components[3]))
return HttpResponseBadRequest(
"y out of range %f or %f" %
(bounds_components[1], bounds_components[3]))
ll = Point(bounds_components[0], bounds_components[1], srid=4326)
ll.transform(render_srid)
ur = Point(bounds_components[2], bounds_components[3], srid=4326)
ur.transform(render_srid)
bounds_box = mapnik.Box2d(ll.x, ll.y, ur.x, ur.y)
elif center:
center_components = center.split(',')
if len(center_components) != 3:
return HttpResponseBadRequest()
lon = float(center_components[0])
lat = float(center_components[1])
zoom = int(center_components[2])
# todo calc bounds from center and zoom
# baselayer
if background not in settings.BASE_LAYERS and background != 'none':
return HttpResponseNotFound("Background not found")
# GeoJSON post data
if request.method == "POST" and len(request.body):
input_data = json.loads(request.body)
else:
input_data = None
if not bounds and not center and not input_data:
return HttpResponseBadRequest(
"Bounds, center, or post data is required.")
# initialize map
m = mapnik.Map(width, height)
m.srs = '+init=epsg:' + str(render_srid)
# add a tile source as a background
if background != "none":
background_file = settings.BASE_LAYERS[background]
background_style = mapnik.Style()
background_rule = mapnik.Rule()
background_rule.symbols.append(mapnik.RasterSymbolizer())
background_style.rules.append(background_rule)
m.append_style('background style', background_style)
tile_layer = mapnik.Layer('background')
tile_layer.srs = '+init=epsg:' + str(render_srid)
tile_layer.datasource = mapnik.Gdal(base=settings.BASE_LAYER_DIR,
file=background_file)
tile_layer.styles.append('background style')
m.layers.append(tile_layer)
# add features from geojson
if input_data and input_data['type'] == "Feature":
features = [input_data]
elif input_data and input_data['type'] == "FeatureCollection":
if 'features' not in input_data:
return HttpResponseBadRequest()
features = input_data['features']
else:
features = []
logging.debug("Adding %d features to map" % len(features))
geometries = []
point_features = []
fid = 0
for feature in features:
if 'geometry' not in feature:
logging.debug("feature does not have geometry")
return HttpResponseBadRequest("Feature does not have a geometry")
if 'type' not in feature['geometry']:
logging.debug("geometry does not have type")
return HttpResponseBadRequest("Geometry does not have a type")
fid += 1
style_name = str(fid)
if feature['geometry']['type'] == 'Point':
point_features.append(feature)
elif feature['geometry']['type'] in ('LineString', 'MultiLineString'):
if feature['geometry']['type'] == 'LineString':
geos_feature = LineString(feature['geometry']['coordinates'])
elif feature['geometry']['type'] == 'MultiLineString':
rings = feature['geometry']['coordinates']
rings = [[(c[0], c[1]) for c in r] for r in rings]
if len(rings) == 1:
geos_feature = LineString(rings[0])
else:
linestrings = []
for ring in rings:
try:
linestrings.append(LineString(ring))
except Exception, e:
logging.error("Error adding ring: %s", e)
geos_feature = MultiLineString(linestrings)
geos_feature.srid = 4326
geos_feature.transform(render_srid)
geometries.append(geos_feature)
style = mapnik.Style()
line_rule = mapnik.Rule()
style_dict = None
if 'style' in feature:
style_dict = feature['style']
elif 'properties' in feature:
style_dict = feature['properties']
line_rule.symbols.append(line_symbolizer(style_dict))
style.rules.append(line_rule)
m.append_style(style_name, style)
wkt = geos_feature.wkt
line_layer = mapnik.Layer(style_name + ' layer')
line_layer.datasource = mapnik.CSV(inline='wkt\n' + '"' + wkt +
'"')
line_layer.styles.append(style_name)
line_layer.srs = '+init=epsg:' + str(render_srid)
m.layers.append(line_layer)
elif feature['geometry']['type'] == 'Polygon':
geos_feature = GEOSGeometry(json.dumps(feature['geometry']))
geos_feature.srid = 4326
geos_feature.transform(render_srid)
geometries.append(geos_feature)
style = mapnik.Style()
rule = mapnik.Rule()
style_dict = None
if 'style' in feature:
style_dict = feature['style']
elif 'properties' in feature:
style_dict = feature['properties']
rule.symbols.append(polygon_symbolizer(style_dict))
rule.symbols.append(line_symbolizer(style_dict))
style.rules.append(rule)
m.append_style(style_name, style)
wkt = geos_feature.wkt
layer = mapnik.Layer(style_name + ' layer')
layer.datasource = mapnik.CSV(inline='wkt\n' + '"' + wkt + '"')
layer.styles.append(style_name)
layer.srs = '+init=epsg:' + str(render_srid)
m.layers.append(layer)
# -*- coding: utf-8 -*-
print('=' * 40)
print(__file__)
from helper.textool import get_tmp_file
################################################################################
import mapnik
m = mapnik.Map(600, 500, "+proj=latlong +datum=WGS84")
symbol = mapnik.RasterSymbolizer()
################################################################################
s = mapnik.Style()
r = mapnik.Rule()
r.symbols.append(symbol)
s.rules.append(r)
m.append_style('My Style', s)
datasource = mapnik.Gdal(file='/gdata/geotiff_file.tif')
layer = mapnik.Layer("myLayer")
layer.datasource = datasource
layer.styles.append('My Style')
m.layers.append(layer)
################################################################################
layer.envelope()
################################################################################
m.zoom_to_box(layer.envelope())
# mapnik.render_to_file(m, 'xx_mapnik_result.png', 'png')
mapnik.render_to_file(m, get_tmp_file(__file__, '1'), 'png')
def _test_rgba_subquery(lbl, pixtype, r, g, b, a, g1, b1):
#
# 3 8 13
# +---+---+---+
# 3 | v | v | h | NOTE: writes different alpha
# +---+---+---+ in 13,8 and 8,13
# 8 | v | v | a |
# +---+---+---+
# 13 | v | b | v |
# +---+---+---+
#
sql = "(select 3 as i, " \
" ST_SetValues(" \
" ST_SetValues(" \
" ST_AddBand(" \
" ST_AddBand(" \
" ST_AddBand(" \
" ST_AsRaster(" \
" ST_MakeEnvelope(0,0,14,14), " \
" 1.0, -1.0, '%s', %s" \
" )," \
" '%s', %d::float" \
" ), " \
" '%s', %d::float" \
" ), " \
" '%s', %d::float" \
" ), " \
" 2, 11, 6, 4, 5, %s::float8" \
" )," \
" 3, 6, 11, 5, 4, %s::float8" \
" ) as r" \
") as foo" % (pixtype, r, pixtype, g, pixtype, b, pixtype, a, g1, b1)
overview = ''
rescale = 0
clip = 0
if rescale:
lbl += ' Sc'
if clip:
lbl += ' Cl'
ds = mapnik.PgRaster(dbname=MAPNIK_TEST_DBNAME,
table=sql,
raster_field='r',
use_overviews=0 if overview else 0,
prescale_rasters=rescale,
clip_rasters=clip)
fs = ds.featureset()
feature = fs.next()
eq_(feature['i'], 3)
lyr = mapnik.Layer('rgba_subquery')
lyr.datasource = ds
expenv = mapnik.Box2d(0, 0, 14, 14)
env = lyr.envelope()
assert_almost_equal(env.minx, expenv.minx, places=0)
assert_almost_equal(env.miny, expenv.miny, places=0)
assert_almost_equal(env.maxx, expenv.maxx, places=0)
assert_almost_equal(env.maxy, expenv.maxy, places=0)
mm = mapnik.Map(15, 15)
style = mapnik.Style()
sym = mapnik.RasterSymbolizer()
rule = mapnik.Rule()
rule.symbols.append(sym)
style.rules.append(rule)
mm.append_style('foo', style)
lyr.styles.append('foo')
mm.layers.append(lyr)
mm.zoom_to_box(expenv)
im = mapnik.Image(mm.width, mm.height)
t0 = time.time() # we want wall time to include IO waits
mapnik.render(mm, im)
lap = time.time() - t0
log('T ' + str(lap) + ' -- ' + lbl + ' E:full')
expected = 'images/support/pgraster/%s-%s-%s-%s-%s-%s-%s-%s-%s.png' % (
lyr.name, lbl, pixtype, r, g, b, a, g1, b1)
compare_images(expected, im)
hex_v = format(r << 24 | g << 16 | b << 8 | a, '08x')
hex_a = format(r << 24 | g1 << 16 | b << 8 | a, '08x')
hex_b = format(r << 24 | g << 16 | b1 << 8 | a, '08x')
eq_(hexlify(im.view(3, 3, 1, 1).tostring()), hex_v)
eq_(hexlify(im.view(8, 3, 1, 1).tostring()), hex_v)
eq_(hexlify(im.view(13, 3, 1, 1).tostring()), hex_v)
eq_(hexlify(im.view(3, 8, 1, 1).tostring()), hex_v)
eq_(hexlify(im.view(8, 8, 1, 1).tostring()), hex_v)
eq_(hexlify(im.view(13, 8, 1, 1).tostring()), hex_a)
eq_(hexlify(im.view(3, 13, 1, 1).tostring()), hex_v)
eq_(hexlify(im.view(8, 13, 1, 1).tostring()), hex_b)
eq_(hexlify(im.view(13, 13, 1, 1).tostring()), hex_v)
def _test_data_subquery(lbl, pixtype, value):
#
# 3 8 13
# +---+---+---+
# 3 | v | v | v | NOTE: writes different values
# +---+---+---+ in 13,8 and 8,13
# 8 | v | v | a |
# +---+---+---+
# 13 | v | b | v |
# +---+---+---+
#
val_a = value / 3
val_b = val_a * 2
sql = "(select 3 as i, " \
" ST_SetValues(" \
" ST_SetValues(" \
" ST_AsRaster(" \
" ST_MakeEnvelope(0,0,14,14), " \
" 1.0, -1.0, '%s', %s" \
" ), " \
" 11, 6, 5, 5, %s::float8" \
" )," \
" 6, 11, 5, 5, %s::float8" \
" ) as \"R\"" \
") as foo" % (pixtype,value, val_a, val_b)
overview = ''
rescale = 0
clip = 0
if rescale:
lbl += ' Sc'
if clip:
lbl += ' Cl'
ds = mapnik.PgRaster(dbname=MAPNIK_TEST_DBNAME,
table=sql,
raster_field='R',
use_overviews=0 if overview else 0,
band=1,
prescale_rasters=rescale,
clip_rasters=clip)
fs = ds.featureset()
feature = fs.next()
eq_(feature['i'], 3)
lyr = mapnik.Layer('data_subquery')
lyr.datasource = ds
expenv = mapnik.Box2d(0, 0, 14, 14)
env = lyr.envelope()
assert_almost_equal(env.minx, expenv.minx, places=0)
assert_almost_equal(env.miny, expenv.miny, places=0)
assert_almost_equal(env.maxx, expenv.maxx, places=0)
assert_almost_equal(env.maxy, expenv.maxy, places=0)
mm = mapnik.Map(15, 15)
style = mapnik.Style()
col = mapnik.RasterColorizer()
col.default_mode = mapnik.COLORIZER_DISCRETE
col.add_stop(val_a, mapnik.Color(0xff, 0x00, 0x00, 255))
col.add_stop(val_b, mapnik.Color(0x00, 0xff, 0x00, 255))
col.add_stop(value, mapnik.Color(0x00, 0x00, 0xff, 255))
sym = mapnik.RasterSymbolizer()
sym.colorizer = col
rule = mapnik.Rule()
rule.symbols.append(sym)
style.rules.append(rule)
mm.append_style('foo', style)
lyr.styles.append('foo')
mm.layers.append(lyr)
mm.zoom_to_box(expenv)
im = mapnik.Image(mm.width, mm.height)
t0 = time.time() # we want wall time to include IO waits
mapnik.render(mm, im)
lap = time.time() - t0
log('T ' + str(lap) + ' -- ' + lbl + ' E:full')
expected = 'images/support/pgraster/%s-%s-%s-%s.png' % (lyr.name, lbl,
pixtype, value)
compare_images(expected, im)
def _test_rgb_8bui_rendering(lbl, tnam, overview, rescale, clip):
if rescale:
lbl += ' Sc'
if clip:
lbl += ' Cl'
ds = mapnik.PgRaster(dbname=MAPNIK_TEST_DBNAME,
table=tnam,
use_overviews=1 if overview else 0,
prescale_rasters=rescale,
clip_rasters=clip)
fs = ds.featureset()
feature = fs.next()
eq_(feature['rid'], 1)
lyr = mapnik.Layer('rgba_8bui')
lyr.datasource = ds
expenv = mapnik.Box2d(-12329035.7652168,4508650.39854396, \
-12328653.0279471,4508957.34625536)
env = lyr.envelope()
# As the input size is a prime number both horizontally
# and vertically, we expect the extent of the overview
# tables to be a pixel wider than the original, whereas
# the pixel size in geographical units depends on the
# overview factor. So we start with the original pixel size
# as base scale and multiply by the overview factor.
# NOTE: the overview table extent only grows north and east
pixsize = 2 # see gdalinfo nodata-edge.tif
tol = pixsize * max(overview.split(',')) if overview else 0
assert_almost_equal(env.minx, expenv.minx, places=0)
assert_almost_equal(env.miny, expenv.miny, delta=tol)
assert_almost_equal(env.maxx, expenv.maxx, delta=tol)
assert_almost_equal(env.maxy, expenv.maxy, places=0)
mm = mapnik.Map(256, 256)
style = mapnik.Style()
sym = mapnik.RasterSymbolizer()
rule = mapnik.Rule()
rule.symbols.append(sym)
style.rules.append(rule)
mm.append_style('foo', style)
lyr.styles.append('foo')
mm.layers.append(lyr)
mm.zoom_to_box(expenv)
im = mapnik.Image(mm.width, mm.height)
t0 = time.time() # we want wall time to include IO waits
mapnik.render(mm, im)
lap = time.time() - t0
log('T ' + str(lap) + ' -- ' + lbl + ' E:full')
expected = 'images/support/pgraster/%s-%s-%s-%s-%s-box1.png' % (
lyr.name, tnam, lbl, overview, clip)
compare_images(expected, im)
# no data
eq_(hexlify(im.view(3, 16, 1, 1).tostring()), '00000000')
eq_(hexlify(im.view(128, 16, 1, 1).tostring()), '00000000')
eq_(hexlify(im.view(250, 16, 1, 1).tostring()), '00000000')
eq_(hexlify(im.view(3, 240, 1, 1).tostring()), '00000000')
eq_(hexlify(im.view(128, 240, 1, 1).tostring()), '00000000')
eq_(hexlify(im.view(250, 240, 1, 1).tostring()), '00000000')
# dark brown
eq_(hexlify(im.view(174, 39, 1, 1).tostring()), 'c3a698ff')
# dark gray
eq_(hexlify(im.view(195, 132, 1, 1).tostring()), '575f62ff')
# Now zoom over a portion of the env (1/10)
newenv = mapnik.Box2d(-12329035.7652168, 4508926.651484220, \
-12328997.49148983,4508957.34625536)
mm.zoom_to_box(newenv)
t0 = time.time() # we want wall time to include IO waits
im = mapnik.Image(mm.width, mm.height)
mapnik.render(mm, im)
lap = time.time() - t0
log('T ' + str(lap) + ' -- ' + lbl + ' E:1/10')
expected = 'images/support/pgraster/%s-%s-%s-%s-%s-box2.png' % (
lyr.name, tnam, lbl, overview, clip)
compare_images(expected, im)
# no data
eq_(hexlify(im.view(3, 16, 1, 1).tostring()), '00000000')
eq_(hexlify(im.view(128, 16, 1, 1).tostring()), '00000000')
eq_(hexlify(im.view(250, 16, 1, 1).tostring()), '00000000')
# black
eq_(hexlify(im.view(3, 42, 1, 1).tostring()), '000000ff')
eq_(hexlify(im.view(3, 134, 1, 1).tostring()), '000000ff')
eq_(hexlify(im.view(3, 244, 1, 1).tostring()), '000000ff')
# gray
eq_(hexlify(im.view(135, 157, 1, 1).tostring()), '4e555bff')
# brown
eq_(hexlify(im.view(195, 223, 1, 1).tostring()), 'f2cdbaff')
def _test_rgba_8bui_rendering(lbl, overview, rescale, clip):
if rescale:
lbl += ' Sc'
if clip:
lbl += ' Cl'
ds = mapnik.PgRaster(dbname=MAPNIK_TEST_DBNAME,
table='(select * from "River") foo',
use_overviews=1 if overview else 0,
prescale_rasters=rescale,
clip_rasters=clip)
fs = ds.featureset()
feature = fs.next()
eq_(feature['rid'], 1)
lyr = mapnik.Layer('rgba_8bui')
lyr.datasource = ds
expenv = mapnik.Box2d(0, -210, 256, 0)
env = lyr.envelope()
# As the input size is a prime number both horizontally
# and vertically, we expect the extent of the overview
# tables to be a pixel wider than the original, whereas
# the pixel size in geographical units depends on the
# overview factor. So we start with the original pixel size
# as base scale and multiply by the overview factor.
# NOTE: the overview table extent only grows north and east
pixsize = 1 # see gdalinfo river.tif
tol = pixsize * max(overview.split(',')) if overview else 0
assert_almost_equal(env.minx, expenv.minx)
assert_almost_equal(env.miny, expenv.miny, delta=tol)
assert_almost_equal(env.maxx, expenv.maxx, delta=tol)
assert_almost_equal(env.maxy, expenv.maxy)
mm = mapnik.Map(256, 256)
style = mapnik.Style()
sym = mapnik.RasterSymbolizer()
rule = mapnik.Rule()
rule.symbols.append(sym)
style.rules.append(rule)
mm.append_style('foo', style)
lyr.styles.append('foo')
mm.layers.append(lyr)
mm.zoom_to_box(expenv)
im = mapnik.Image(mm.width, mm.height)
t0 = time.time() # we want wall time to include IO waits
mapnik.render(mm, im)
lap = time.time() - t0
log('T ' + str(lap) + ' -- ' + lbl + ' E:full')
expected = 'images/support/pgraster/%s-%s-%s-%s-box1.png' % (
lyr.name, lbl, overview, clip)
compare_images(expected, im)
# no data
eq_(hexlify(im.view(3, 3, 1, 1).tostring()), '00000000')
eq_(hexlify(im.view(250, 250, 1, 1).tostring()), '00000000')
# full opaque river color
eq_(hexlify(im.view(175, 118, 1, 1).tostring()), 'b9d8f8ff')
# half-transparent pixel
pxstr = hexlify(im.view(122, 138, 1, 1).tostring())
apat = ".*(..)$"
match = re.match(apat, pxstr)
assert match, 'pixel ' + pxstr + ' does not match pattern ' + apat
alpha = match.group(1)
assert alpha != 'ff' and alpha != '00', \
'unexpected full transparent/opaque pixel: ' + alpha
# Now zoom over a portion of the env (1/10)
newenv = mapnik.Box2d(166, -105, 191, -77)
mm.zoom_to_box(newenv)
t0 = time.time() # we want wall time to include IO waits
im = mapnik.Image(mm.width, mm.height)
mapnik.render(mm, im)
lap = time.time() - t0
log('T ' + str(lap) + ' -- ' + lbl + ' E:1/10')
expected = 'images/support/pgraster/%s-%s-%s-%s-box2.png' % (
lyr.name, lbl, overview, clip)
compare_images(expected, im)
# no data
eq_(hexlify(im.view(255, 255, 1, 1).tostring()), '00000000')
eq_(hexlify(im.view(200, 40, 1, 1).tostring()), '00000000')
# full opaque river color
eq_(hexlify(im.view(100, 168, 1, 1).tostring()), 'b9d8f8ff')
# half-transparent pixel
pxstr = hexlify(im.view(122, 138, 1, 1).tostring())
apat = ".*(..)$"
match = re.match(apat, pxstr)
assert match, 'pixel ' + pxstr + ' does not match pattern ' + apat
alpha = match.group(1)
assert alpha != 'ff' and alpha != '00', \
'unexpected full transparent/opaque pixel: ' + alpha
def _test_dataraster_16bsi_rendering(lbl, overview, rescale, clip):
if rescale:
lbl += ' Sc'
if clip:
lbl += ' Cl'
ds = mapnik.PgRaster(dbname=MAPNIK_TEST_DBNAME,
table='"dataRaster"',
band=1,
use_overviews=1 if overview else 0,
prescale_rasters=rescale,
clip_rasters=clip)
fs = ds.featureset()
feature = fs.next()
eq_(feature['rid'], 1)
lyr = mapnik.Layer('dataraster_16bsi')
lyr.datasource = ds
expenv = mapnik.Box2d(-14637, 3903178, 1126863, 4859678)
env = lyr.envelope()
# As the input size is a prime number both horizontally
# and vertically, we expect the extent of the overview
# tables to be a pixel wider than the original, whereas
# the pixel size in geographical units depends on the
# overview factor. So we start with the original pixel size
# as base scale and multiply by the overview factor.
# NOTE: the overview table extent only grows north and east
pixsize = 500 # see gdalinfo dataraster.tif
pixsize = 2497 # see gdalinfo dataraster-small.tif
tol = pixsize * max(overview.split(',')) if overview else 0
assert_almost_equal(env.minx, expenv.minx)
assert_almost_equal(env.miny, expenv.miny, delta=tol)
assert_almost_equal(env.maxx, expenv.maxx, delta=tol)
assert_almost_equal(env.maxy, expenv.maxy)
mm = mapnik.Map(256, 256)
style = mapnik.Style()
col = mapnik.RasterColorizer()
col.default_mode = mapnik.COLORIZER_DISCRETE
col.add_stop(0, mapnik.Color(0x40, 0x40, 0x40, 255))
col.add_stop(10, mapnik.Color(0x80, 0x80, 0x80, 255))
col.add_stop(20, mapnik.Color(0xa0, 0xa0, 0xa0, 255))
sym = mapnik.RasterSymbolizer()
sym.colorizer = col
rule = mapnik.Rule()
rule.symbols.append(sym)
style.rules.append(rule)
mm.append_style('foo', style)
lyr.styles.append('foo')
mm.layers.append(lyr)
mm.zoom_to_box(expenv)
im = mapnik.Image(mm.width, mm.height)
t0 = time.time() # we want wall time to include IO waits
mapnik.render(mm, im)
lap = time.time() - t0
log('T ' + str(lap) + ' -- ' + lbl + ' E:full')
# no data
eq_(im.view(1, 1, 1, 1).tostring(), '\x00\x00\x00\x00')
eq_(im.view(255, 255, 1, 1).tostring(), '\x00\x00\x00\x00')
eq_(im.view(195, 116, 1, 1).tostring(), '\x00\x00\x00\x00')
# A0A0A0
eq_(im.view(100, 120, 1, 1).tostring(), '\xa0\xa0\xa0\xff')
eq_(im.view(75, 80, 1, 1).tostring(), '\xa0\xa0\xa0\xff')
# 808080
eq_(im.view(74, 170, 1, 1).tostring(), '\x80\x80\x80\xff')
eq_(im.view(30, 50, 1, 1).tostring(), '\x80\x80\x80\xff')
# 404040
eq_(im.view(190, 70, 1, 1).tostring(), '\x40\x40\x40\xff')
eq_(im.view(140, 170, 1, 1).tostring(), '\x40\x40\x40\xff')
# Now zoom over a portion of the env (1/10)
newenv = mapnik.Box2d(273663, 4024478, 330738, 4072303)
mm.zoom_to_box(newenv)
t0 = time.time() # we want wall time to include IO waits
mapnik.render(mm, im)
lap = time.time() - t0
log('T ' + str(lap) + ' -- ' + lbl + ' E:1/10')
# nodata
eq_(hexlify(im.view(255, 255, 1, 1).tostring()), '00000000')
eq_(hexlify(im.view(200, 254, 1, 1).tostring()), '00000000')
# A0A0A0
eq_(hexlify(im.view(90, 232, 1, 1).tostring()), 'a0a0a0ff')
eq_(hexlify(im.view(96, 245, 1, 1).tostring()), 'a0a0a0ff')
# 808080
eq_(hexlify(im.view(1, 1, 1, 1).tostring()), '808080ff')
eq_(hexlify(im.view(128, 128, 1, 1).tostring()), '808080ff')
# 404040
eq_(hexlify(im.view(255, 0, 1, 1).tostring()), '404040ff')
def _test_grayscale_subquery(lbl, pixtype, value):
#
# 3 8 13
# +---+---+---+
# 3 | v | v | v | NOTE: writes different color
# +---+---+---+ in 13,8 and 8,13
# 8 | v | v | a |
# +---+---+---+
# 13 | v | b | v |
# +---+---+---+
#
val_a = value / 3
val_b = val_a * 2
sql = "(select 3 as i, " \
" ST_SetValues(" \
" ST_SetValues(" \
" ST_AsRaster(" \
" ST_MakeEnvelope(0,0,14,14), " \
" 1.0, -1.0, '%s', %s" \
" ), " \
" 11, 6, 4, 5, %s::float8" \
" )," \
" 6, 11, 5, 4, %s::float8" \
" ) as \"R\"" \
") as foo" % (pixtype,value, val_a, val_b)
rescale = 0
clip = 0
if rescale:
lbl += ' Sc'
if clip:
lbl += ' Cl'
ds = mapnik.PgRaster(dbname=MAPNIK_TEST_DBNAME,
table=sql,
raster_field='"R"',
use_overviews=1,
prescale_rasters=rescale,
clip_rasters=clip)
fs = ds.featureset()
feature = fs.next()
eq_(feature['i'], 3)
lyr = mapnik.Layer('grayscale_subquery')
lyr.datasource = ds
expenv = mapnik.Box2d(0, 0, 14, 14)
env = lyr.envelope()
assert_almost_equal(env.minx, expenv.minx, places=0)
assert_almost_equal(env.miny, expenv.miny, places=0)
assert_almost_equal(env.maxx, expenv.maxx, places=0)
assert_almost_equal(env.maxy, expenv.maxy, places=0)
mm = mapnik.Map(15, 15)
style = mapnik.Style()
sym = mapnik.RasterSymbolizer()
rule = mapnik.Rule()
rule.symbols.append(sym)
style.rules.append(rule)
mm.append_style('foo', style)
lyr.styles.append('foo')
mm.layers.append(lyr)
mm.zoom_to_box(expenv)
im = mapnik.Image(mm.width, mm.height)
t0 = time.time() # we want wall time to include IO waits
mapnik.render(mm, im)
lap = time.time() - t0
log('T ' + str(lap) + ' -- ' + lbl + ' E:full')
#im.save('/tmp/xfull.png') # for debugging
h = format(value, '02x')
hex_v = h + h + h + 'ff'
h = format(val_a, '02x')
hex_a = h + h + h + 'ff'
h = format(val_b, '02x')
hex_b = h + h + h + 'ff'
eq_(hexlify(im.view(3, 3, 1, 1).tostring()), hex_v)
eq_(hexlify(im.view(8, 3, 1, 1).tostring()), hex_v)
eq_(hexlify(im.view(13, 3, 1, 1).tostring()), hex_v)
eq_(hexlify(im.view(3, 8, 1, 1).tostring()), hex_v)
eq_(hexlify(im.view(8, 8, 1, 1).tostring()), hex_v)
eq_(hexlify(im.view(13, 8, 1, 1).tostring()), hex_a)
eq_(hexlify(im.view(3, 13, 1, 1).tostring()), hex_v)
eq_(hexlify(im.view(8, 13, 1, 1).tostring()), hex_b)
eq_(hexlify(im.view(13, 13, 1, 1).tostring()), hex_v)
def tileRaster(request, version, zoom, x, y):
try:
if version != "1.0":
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"
)
#defining the feature layer
datasource = mapnik.Gdal(file="bar_harbour.dem",
base="C:\\Temp\\dem\\",
band=1)
featureLayer = mapnik.Layer("RasterLayer")
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("RasterLayerStyle")
#defining the feature layer styles
rule = mapnik.Rule()
rule.symbols.append(mapnik.RasterSymbolizer())
style = mapnik.Style()
style.rules.append(rule)
#add new feature to the map
map.append_style("RasterLayerStyle", style)
map.layers.append(featureLayer)
#rendering the map tile
#mapnik.save_map(map, "../tilestache/%s/raster.xml" % str(request.user))
config = {
"cache": {
"name": "Test",
"path": "../tilestache/%s" % (request.user),
"umask": "0000",
"dirs": "portable"
},
"layers": {
"raster": {
"provider": {
"name":
"mapnik",
"mapfile":
"../tilestache/%s/layers/raster/raster.xml" %
(request.user)
},
"projection": "spherical mercator",
"metatile": {
"rows": 2,
"columns": 2,
"buffer": 64
},
"write cache": False
}
}
}
# like http://tile.openstreetmap.org/1/0/0.png
#coord = ModestMaps.Core.Coordinate(y, x, zoom)
path = "/raster/%s/%s/%s.png" % (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("")
# Script to draw a topo map with mapnik.
import mapnik
srs = '+proj=utm +zone=10 +ellps=GRS80 +datum=NAD83 +units=m +no_defs'
m = mapnik.Map(1200, 1200, srs)
m.zoom_to_box(mapnik.Box2d(558800, 5112200, 566600, 5120500))
# Add a GDAL datasource.
topo_lyr = mapnik.Layer('Topo', srs)
topo_raster = mapnik.Gdal(file=r'D:\osgeopy-data\Washington\dem\st_helens.tif')
topo_lyr.datasource = topo_raster
# Use a raster symbolizer.
topo_sym = mapnik.RasterSymbolizer()
topo_rule = mapnik.Rule()
topo_rule.symbols.append(topo_sym)
topo_style = mapnik.Style()
topo_style.rules.append(topo_rule)
m.append_style('topo', topo_style)
topo_lyr.styles.append('topo')
m.layers.append(topo_lyr)
mapnik.render_to_file(m, r'd:\temp\helens.png')
import mapnik
m = mapnik.Map(1000,1000, '+init=epsg:32718') # create a map with a given width and height in pixels
# note: m.srs will default to '+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs'
# the 'map.srs' is the target projection of the map and can be whatever you wish
m.background = mapnik.Color('transparent') # set background colour to 'steelblue'.
s = mapnik.Style() # style object to hold rules
r = mapnik.Rule() # rule object to hold symbolizers
landsatDS = mapnik.Gdal(file='L5TM_086S772W_20090628_TOARefl_RGB_Strd.tif')
landsatLyr = mapnik.Layer('Landsat', '+init=epsg:32718')
landsatLyr.datasource = landsatDS
r.symbols.append(mapnik.RasterSymbolizer())
s.rules.append(r)
m.append_style('My Style',s) # Styles are given names only as they are applied to the map
landsatLyr.styles.append('My Style')
m.layers.append(landsatLyr)
m.zoom_all()
#bbox = mapnik.Envelope(mapnik.Coord(220000.0, 8960000), mapnik.Coord(260000, 9000000))
#m.zoom_to_box(bbox)
page = mapnik.printing.PDFPrinter(pagesize=(0.20, 0.20), margin=0.0075, resolution=150, preserve_aspect=True, centering=5, is_latlon=False, use_ocg_layers=True)
page.render_map(m,"Map2009Landsat.pdf")
import mapnik
import time
if __name__ == '__main__':
start = time.time()
m = mapnik.Map(256, 256)
m.srs = '+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs'
s = mapnik.Style()
r = mapnik.Rule()
raster_symbolizer = mapnik.RasterSymbolizer()
raster_symbolizer.colorizer = mapnik.RasterColorizer(
mapnik.COLORIZER_LINEAR, mapnik.Color("transparent"))
raster_symbolizer.colorizer.add_stop(0.0, mapnik.Color("black"))
raster_symbolizer.colorizer.add_stop(1.0, mapnik.Color("white"))
print -9999, raster_symbolizer.colorizer.get_color(-9999)
print 0.0, raster_symbolizer.colorizer.get_color(0.0)
print 1.0, raster_symbolizer.colorizer.get_color(1.0)
print 0, raster_symbolizer.colorizer.get_color(0)
print 1, raster_symbolizer.colorizer.get_color(1)
print 0.5, raster_symbolizer.colorizer.get_color(0.5)
r.symbols.append(raster_symbolizer)
s.rules.append(r)
m.append_style('raster_style', s)
lyr = mapnik.Layer('urban')
