def test_array2wkt(self):
"""Conversion to wkt data works
It should create something like this
'POLYGON((0 1, 2 3, 4 5, 6 7, 8 9))'
"""
# Arrays first
A = numpy.arange(10)
A = A.reshape(5, 2)
wkt = array2wkt(A, geom_type='POLYGON')
assert wkt.startswith('POLYGON((')
fields = wkt[9:-2].split(',')
for i, field in enumerate(fields):
x, y = field.split()
assert numpy.allclose(A[i, :], [float(x), float(y)])
# Then list
wkt = array2wkt(A.tolist(), geom_type='POLYGON')
assert wkt.startswith('POLYGON((')
fields = wkt[9:-2].split(',')
for i, field in enumerate(fields):
x, y = field.split()
assert numpy.allclose(A[i, :], [float(x), float(y)])
# Then a linestring example (note one less bracket)
wkt = array2wkt(A, geom_type='LINESTRING')
assert wkt.startswith('LINESTRING(')
fields = wkt[11:-1].split(',')
for i, field in enumerate(fields):
x, y = field.split()
assert numpy.allclose(A[i, :], [float(x), float(y)])
def write_to_file(self, filename):
"""Save vector data to file
Input
filename: filename with extension .shp or .gml
Note, if attribute names are longer than 10 characters they will be
truncated. This is due to limitations in the shp file driver and has
to be done here since gdal v1.7 onwards has changed its handling of
this issue: http://www.gdal.org/ogr/drv_shapefile.html
"""
# Check file format
basename, extension = os.path.splitext(filename)
msg = "Invalid file type for file %s. Only extensions " "shp or gml allowed." % filename
assert extension == ".shp" or extension == ".gml", msg
driver = DRIVER_MAP[extension]
# FIXME (Ole): Tempory flagging of GML issue (ticket #18)
if extension == ".gml":
msg = (
"OGR GML driver does not store geospatial reference."
"This format is disabled for the time being. See "
"https://github.com/AIFDR/riab/issues/18"
)
raise Exception(msg)
# Derive layername from filename (excluding preceding dirs)
layername = os.path.split(basename)[-1]
# Get vector data
geometry = self.get_geometry()
data = self.get_data()
N = len(geometry)
# Clear any previous file of this name (ogr does not overwrite)
try:
os.remove(filename)
except:
pass
# Create new file with one layer
drv = ogr.GetDriverByName(driver)
if drv is None:
msg = "OGR driver %s not available" % driver
raise Exception(msg)
ds = drv.CreateDataSource(filename)
if ds is None:
msg = "Creation of output file %s failed" % filename
raise Exception(msg)
lyr = ds.CreateLayer(layername, self.projection.spatial_reference, self.geometry_type)
if lyr is None:
msg = "Could not create layer %s" % layername
raise Exception(msg)
# Define attributes if any
store_attributes = False
if data is not None:
if len(data) > 0:
try:
fields = data[0].keys()
except:
msg = (
'Input parameter "attributes" was specified '
"but it does not contain dictionaries with "
"field information as expected. The first"
"element is %s" % data[0]
)
raise Exception(msg)
else:
# Establish OGR types for each element
ogrtypes = {}
for name in fields:
att = data[0][name]
py_type = type(att)
msg = "Unknown type for storing vector " "data: %s, %s" % (name, str(py_type)[1:-1])
assert py_type in TYPE_MAP, msg
ogrtypes[name] = TYPE_MAP[py_type]
else:
msg = 'Input parameter "data" was specified ' "but appears to be empty"
raise Exception(msg)
# Create attribute fields in layer
store_attributes = True
for name in fields:
fd = ogr.FieldDefn(name, ogrtypes[name])
# FIXME (Ole): Trying to address issue #16
# But it doesn't work and
# somehow changes the values of MMI in test
# width = max(128, len(name))
# print name, width
# fd.SetWidth(width)
# Silent handling of warnings like
# Warning 6: Normalized/laundered field name:
#'CONTENTS_LOSS_AUD' to 'CONTENTS_L'
gdal.PushErrorHandler("CPLQuietErrorHandler")
if lyr.CreateField(fd) != 0:
msg = "Could not create field %s" % name
raise Exception(msg)
# Restore error handler
gdal.PopErrorHandler()
# Store geometry
geom = ogr.Geometry(self.geometry_type)
layer_def = lyr.GetLayerDefn()
for i in range(N):
# Create new feature instance
feature = ogr.Feature(layer_def)
# Store geometry and check
if self.geometry_type == ogr.wkbPoint:
x = float(geometry[i][0])
y = float(geometry[i][1])
geom.SetPoint_2D(0, x, y)
elif self.geometry_type == ogr.wkbPolygon:
wkt = array2wkt(geometry[i], geom_type="POLYGON")
geom = ogr.CreateGeometryFromWkt(wkt)
else:
msg = "Geometry type %s not implemented" % self.geometry_type
raise Exception(msg)
feature.SetGeometry(geom)
G = feature.GetGeometryRef()
if G is None:
msg = "Could not create GeometryRef for file %s" % filename
raise Exception(msg)
# Store attributes
if store_attributes:
for j, name in enumerate(fields):
actual_field_name = layer_def.GetFieldDefn(j).GetNameRef()
val = data[i][name]
if type(val) == numpy.ndarray:
# A singleton of type <type 'numpy.ndarray'> works
# for gdal version 1.6 but fails for version 1.8
# in SetField with error: NotImplementedError:
# Wrong number of arguments for overloaded function
val = float(val)
feature.SetField(actual_field_name, val)
# Save this feature
if lyr.CreateFeature(feature) != 0:
msg = "Failed to create feature %i in file %s" % (i, filename)
raise Exception(msg)
feature.Destroy()
# Write keywords if any
write_keywords(self.keywords, basename + ".keywords")
def write_to_file(self, filename):
"""Save vector data to file
Input
filename: filename with extension .shp or .gml
Note, if attribute names are longer than 10 characters they will be
truncated. This is due to limitations in the shp file driver and has
to be done here since gdal v1.7 onwards has changed its handling of
this issue: http://www.gdal.org/ogr/drv_shapefile.html
"""
# Check file format
basename, extension = os.path.splitext(filename)
msg = ('Invalid file type for file %s. Only extensions '
'shp or gml allowed.' % filename)
assert extension == '.shp' or extension == '.gml', msg
driver = DRIVER_MAP[extension]
# FIXME (Ole): Tempory flagging of GML issue (ticket #18)
if extension == '.gml':
msg = ('OGR GML driver does not store geospatial reference.'
'This format is disabled for the time being. See '
'https://github.com/AIFDR/riab/issues/18')
raise Exception(msg)
# Derive layername from filename (excluding preceding dirs)
layername = os.path.split(basename)[-1]
# Get vector data
geometry = self.get_geometry()
data = self.get_data()
N = len(geometry)
# Clear any previous file of this name (ogr does not overwrite)
try:
os.remove(filename)
except:
pass
# Create new file with one layer
drv = ogr.GetDriverByName(driver)
if drv is None:
msg = 'OGR driver %s not available' % driver
raise Exception(msg)
ds = drv.CreateDataSource(filename)
if ds is None:
msg = 'Creation of output file %s failed' % filename
raise Exception(msg)
lyr = ds.CreateLayer(layername, self.projection.spatial_reference,
self.geometry_type)
if lyr is None:
msg = 'Could not create layer %s' % layername
raise Exception(msg)
# Define attributes if any
store_attributes = False
if data is not None:
if len(data) > 0:
try:
fields = data[0].keys()
except:
msg = ('Input parameter "attributes" was specified '
'but it does not contain dictionaries with '
'field information as expected. The first'
'element is %s' % data[0])
raise Exception(msg)
else:
# Establish OGR types for each element
ogrtypes = {}
for name in fields:
att = data[0][name]
py_type = type(att)
msg = ('Unknown type for storing vector '
'data: %s, %s' % (name, str(py_type)[1:-1]))
assert py_type in TYPE_MAP, msg
ogrtypes[name] = TYPE_MAP[py_type]
else:
msg = ('Input parameter "data" was specified '
'but appears to be empty')
raise Exception(msg)
# Create attribute fields in layer
store_attributes = True
for name in fields:
fd = ogr.FieldDefn(name, ogrtypes[name])
# FIXME (Ole): Trying to address issue #16
# But it doesn't work and
# somehow changes the values of MMI in test
#width = max(128, len(name))
#print name, width
#fd.SetWidth(width)
# Silent handling of warnings like
# Warning 6: Normalized/laundered field name:
#'CONTENTS_LOSS_AUD' to 'CONTENTS_L'
gdal.PushErrorHandler('CPLQuietErrorHandler')
if lyr.CreateField(fd) != 0:
msg = 'Could not create field %s' % name
raise Exception(msg)
# Restore error handler
gdal.PopErrorHandler()
# Store geometry
geom = ogr.Geometry(self.geometry_type)
layer_def = lyr.GetLayerDefn()
for i in range(N):
# Create new feature instance
feature = ogr.Feature(layer_def)
# Store geometry and check
if self.geometry_type == ogr.wkbPoint:
x = float(geometry[i][0])
y = float(geometry[i][1])
geom.SetPoint_2D(0, x, y)
elif self.geometry_type == ogr.wkbPolygon:
wkt = array2wkt(geometry[i], geom_type='POLYGON')
geom = ogr.CreateGeometryFromWkt(wkt)
else:
msg = 'Geometry type %s not implemented' % self.geometry_type
raise Exception(msg)
feature.SetGeometry(geom)
G = feature.GetGeometryRef()
if G is None:
msg = 'Could not create GeometryRef for file %s' % filename
raise Exception(msg)
# Store attributes
if store_attributes:
for j, name in enumerate(fields):
actual_field_name = layer_def.GetFieldDefn(j).GetNameRef()
val = data[i][name]
if type(val) == numpy.ndarray:
# A singleton of type <type 'numpy.ndarray'> works
# for gdal version 1.6 but fails for version 1.8
# in SetField with error: NotImplementedError:
# Wrong number of arguments for overloaded function
val = float(val)
feature.SetField(actual_field_name, val)
# Save this feature
if lyr.CreateFeature(feature) != 0:
msg = 'Failed to create feature %i in file %s' % (i, filename)
raise Exception(msg)
feature.Destroy()
# Write keywords if any
write_keywords(self.keywords, basename + '.keywords')
def write_to_file(self, filename):
"""Save vector data to file
Input
filename: filename with extension .shp or .gml
"""
# Check file format
basename, extension = os.path.splitext(filename)
msg = ('Invalid file type for file %s. Only extensions '
'shp or gml allowed.' % filename)
assert extension == '.shp' or extension == '.gml', msg
driver = DRIVER_MAP[extension]
# FIXME (Ole): Tempory flagging of GML issue (ticket #18)
if extension == '.gml':
msg = ('OGR GML driver does not store geospatial reference.'
'This format is disabled for the time being. See '
'https://github.com/AIFDR/riab/issues/18')
raise Exception(msg)
# Derive layername from filename (excluding preceding dirs)
layername = os.path.split(basename)[-1]
# Get vector data
geometry = self.get_geometry()
data = self.get_data()
N = len(geometry)
# Clear any previous file of this name (ogr does not overwrite)
try:
os.remove(filename)
except:
pass
# Create new file with one layer
drv = ogr.GetDriverByName(driver)
if drv is None:
msg = 'OGR driver %s not available' % driver
raise Exception(msg)
ds = drv.CreateDataSource(filename)
if ds is None:
msg = 'Creation of output file %s failed' % filename
raise Exception(msg)
lyr = ds.CreateLayer(layername,
self.projection.spatial_reference,
self.geometry_type)
if lyr is None:
msg = 'Could not create layer %s' % layername
raise Exception(msg)
# Define attributes if any
store_attributes = False
if data is not None:
if len(data) > 0:
try:
fields = data[0].keys()
except:
msg = ('Input parameter "attributes" was specified '
'but it does not contain dictionaries with '
'field information as expected. The first'
'element is %s' % data[0])
raise Exception(msg)
else:
# Establish OGR types for each element
ogrtypes = {}
for name in fields:
att = data[0][name]
py_type = type(att)
msg = ('Unknown type for storing vector '
'data: %s, %s' % (name, str(py_type)[1:-1]))
assert py_type in TYPE_MAP, msg
ogrtypes[name] = TYPE_MAP[py_type]
else:
msg = ('Input parameter "data" was specified '
'but appears to be empty')
raise Exception(msg)
# Create attribute fields in layer
store_attributes = True
for name in fields:
fd = ogr.FieldDefn(name, ogrtypes[name])
# FIXME (Ole): Trying to address issue #16
# But it doesn't work and
# somehow changes the values of MMI in test
#width = max(128, len(name))
#print name, width
#fd.SetWidth(width)
if lyr.CreateField(fd) != 0:
msg = 'Could not create field %s' % name
raise Exception(msg)
# Store geometry
geom = ogr.Geometry(self.geometry_type)
layer_def = lyr.GetLayerDefn()
for i in range(N):
# Create new feature instance
feature = ogr.Feature(layer_def)
# Store geometry and check
if self.geometry_type == ogr.wkbPoint:
x = float(geometry[i][0])
y = float(geometry[i][1])
geom.SetPoint_2D(0, x, y)
elif self.geometry_type == ogr.wkbPolygon:
wkt = array2wkt(geometry[i])
geom = ogr.CreateGeometryFromWkt(wkt)
else:
msg = 'Geometry %s not implemented' % self.geometry_type
raise Exception(msg)
feature.SetGeometry(geom)
G = feature.GetGeometryRef()
if G is None:
msg = 'Could not create GeometryRef for file %s' % filename
raise Exception(msg)
# Store attributes
if store_attributes:
for name in fields:
feature.SetField(name, data[i][name])
# Save this feature
if lyr.CreateFeature(feature) != 0:
msg = 'Failed to create feature %i in file %s' % (i, filename)
raise Exception(msg)
feature.Destroy()
# Write keywords if any
write_keywords(self.keywords, basename + '.keywords')
