def geos_multipolygon_from_polygons(ob):
"""ob must be either a sequence or array of sequences or arrays."""
obs = getattr(ob, 'geoms', None) or ob
L = len(obs)
assert L >= 1
exemplar = obs[0]
try:
N = len(exemplar[0][0])
except TypeError:
N = exemplar._ndim
assert N == 2 or N == 3
subs = (c_void_p * L)()
for l in range(L):
shell = getattr(obs[l], 'exterior', None)
if shell is None:
shell = obs[l][0]
holes = getattr(obs[l], 'interiors', None)
if holes is None:
holes = obs[l][1]
geom, ndims = geos_polygon_from_py(shell, holes)
subs[l] = cast(geom, c_void_p)
return (lgeos.GEOSGeom_createCollection(6, subs, L), N)
def geos_multipolygon_from_polygons(ob):
"""
ob must be either a MultiPolygon, sequence or array of sequences
or arrays.
"""
if isinstance(ob, MultiPolygon):
return geos_geom_from_py(ob)
obs = getattr(ob, 'geoms', None) or ob
L = len(obs)
assert L >= 1
exemplar = obs[0]
try:
N = len(exemplar[0][0])
except TypeError:
N = exemplar._ndim
assert N == 2 or N == 3
subs = (c_void_p * L)()
for l in range(L):
shell = getattr(obs[l], 'exterior', None)
if shell is None:
shell = obs[l][0]
holes = getattr(obs[l], 'interiors', None)
if holes is None:
holes = obs[l][1]
geom, ndims = polygon.geos_polygon_from_py(shell, holes)
subs[l] = cast(geom, c_void_p)
return (lgeos.GEOSGeom_createCollection(6, subs, L), N)
def _update_shapely_polygon(self,shell=None,holes = None):
# copying factory of how it is done in shapely 1.7.1 src code,
# soon deprecated btw
ret = geos_polygon_from_py(shell = shell, holes = holes)
if ret is not None:
self._geom, self._ndim = ret
pass
def rotate(self, degrees):
shell = rotate(self.boundary, degrees)
ret = geos_polygon_from_py(shell, None)
if ret is not None:
self._geom, self._ndim = ret
else:
self.empty()
def geos_multipolygon_from_polygons(arg):
"""Creates a GEOS multipolygon from a sequence of polygon-like objects.
Parameters
----------
arg : sequence or MultiPolygon
Returns
-------
int
Pointer to a GEOS multipolygon.
"""
if isinstance(arg, MultiPolygon):
return geos_geom_from_py(arg)
obs = getattr(arg, 'geoms', arg)
obs = [
ob for ob in obs
if ob and not (isinstance(ob, polygon.Polygon) and ob.is_empty)
]
L = len(obs)
# Bail immediately if we have no input points.
if L <= 0:
return (lgeos.GEOSGeom_createEmptyCollection(6), 3)
# This function does not accept sequences of MultiPolygons: there is
# no implicit flattening.
if isinstance(obs[0], MultiPolygon):
raise ValueError("Sequences of multi-polygons are not valid arguments")
exemplar = obs[0]
try:
N = len(exemplar[0][0])
except TypeError:
N = exemplar._ndim
assert N == 2 or N == 3
subs = (c_void_p * L)()
for i, ob in enumerate(obs):
if isinstance(ob, polygon.Polygon):
shell = ob.exterior
holes = ob.interiors
else:
shell = ob[0]
holes = ob[1]
geom, ndims = polygon.geos_polygon_from_py(shell, holes)
subs[i] = cast(geom, c_void_p)
return (lgeos.GEOSGeom_createCollection(6, subs, L), N)
def geos_multipolygon_from_polygons(arg):
"""Creates a GEOS multipolygon from a sequence of polygon-like objects.
Parameters
----------
arg : sequence or MultiPolygon
Returns
-------
int
Pointer to a GEOS multipolygon.
"""
if isinstance(arg, MultiPolygon):
return geos_geom_from_py(arg)
obs = getattr(arg, 'geoms', arg)
obs = [ob for ob in obs
if ob and not (isinstance(ob, polygon.Polygon) and ob.is_empty)]
L = len(obs)
# Bail immediately if we have no input points.
if L <= 0:
return (lgeos.GEOSGeom_createEmptyCollection(6), 3)
# This function does not accept sequences of MultiPolygons: there is
# no implicit flattening.
if isinstance(obs[0], MultiPolygon):
raise ValueError("Sequences of multi-polygons are not valid arguments")
exemplar = obs[0]
try:
N = len(exemplar[0][0])
except TypeError:
N = exemplar._ndim
assert N == 2 or N == 3
subs = (c_void_p * L)()
for i, ob in enumerate(obs):
if isinstance(ob, polygon.Polygon):
shell = ob.exterior
holes = ob.interiors
else:
shell = ob[0]
holes = ob[1]
geom, ndims = polygon.geos_polygon_from_py(shell, holes)
subs[i] = cast(geom, c_void_p)
return (lgeos.GEOSGeom_createCollection(6, subs, L), N)
def geos_multipolygon_from_py(ob):
"""ob must provide Python geo interface coordinates."""
L = len(ob)
N = len(ob[0][0][0])
assert L >= 1
assert N == 2 or N == 3
subs = (c_void_p * L)()
for l in range(L):
geom, ndims = geos_polygon_from_py(ob[l][0], ob[l][1:])
subs[l] = cast(geom, c_void_p)
return (lgeos.GEOSGeom_createCollection(6, subs, L), N)
def geos_multipolygon_from_py(ob):
"""ob must provide Python geo interface coordinates."""
L = len(ob)
N = len(ob[0][0][0])
assert L >= 1
assert N == 2 or N == 3
subs = (c_void_p * L)()
for l in xrange(L):
geom, ndims = geos_polygon_from_py(ob[l][0], ob[l][1:])
subs[l] = cast(geom, c_void_p)
return (lgeos.GEOSGeom_createCollection(6, subs, L), N)
def geos_multipolygon_from_polygons(arg):
"""
ob must be either a MultiPolygon, sequence or array of sequences
or arrays.
"""
if isinstance(arg, MultiPolygon):
return geos_geom_from_py(arg)
obs = getattr(arg, 'geoms', arg)
obs = [
ob for ob in obs
if ob and not (isinstance(ob, polygon.Polygon) and ob.is_empty)
]
L = len(obs)
# Bail immediately if we have no input points.
if L <= 0:
return (lgeos.GEOSGeom_createEmptyCollection(6), 3)
exemplar = obs[0]
try:
N = len(exemplar[0][0])
except TypeError:
N = exemplar._ndim
assert N == 2 or N == 3
subs = (c_void_p * L)()
for i, ob in enumerate(obs):
if isinstance(ob, polygon.Polygon):
shell = ob.exterior
holes = ob.interiors
else:
shell = ob[0]
holes = ob[1]
geom, ndims = polygon.geos_polygon_from_py(shell, holes)
subs[i] = cast(geom, c_void_p)
return (lgeos.GEOSGeom_createCollection(6, subs, L), N)
def geos_multipolygon_from_polygons(arg):
"""
ob must be either a MultiPolygon, sequence or array of sequences
or arrays.
"""
if isinstance(arg, MultiPolygon):
return geos_geom_from_py(arg)
obs = getattr(arg, 'geoms', arg)
obs = [ob for ob in obs
if ob and not (isinstance(ob, polygon.Polygon) and ob.is_empty)]
L = len(obs)
# Bail immediately if we have no input points.
if L <= 0:
return (lgeos.GEOSGeom_createEmptyCollection(6), 3)
exemplar = obs[0]
try:
N = len(exemplar[0][0])
except TypeError:
N = exemplar._ndim
assert N == 2 or N == 3
subs = (c_void_p * L)()
for i, ob in enumerate(obs):
if isinstance(ob, polygon.Polygon):
shell = ob.exterior
holes = ob.interiors
else:
shell = ob[0]
holes = ob[1]
geom, ndims = polygon.geos_polygon_from_py(shell, holes)
subs[i] = cast(geom, c_void_p)
return (lgeos.GEOSGeom_createCollection(6, subs, L), N)