shapely.polygonize_full
shapely.polygonize_full#
- polygonize_full(geometries, **kwargs)#
Creates polygons formed from the linework of a set of Geometries and return all extra outputs as well.
Polygonizes an array of Geometries that contain linework which represents the edges of a planar graph. Any type of Geometry may be provided as input; only the constituent lines and rings will be used to create the output polygons.
This function performs the same polygonization as
polygonize
but does not only return the polygonal result but all extra outputs as well. The return value consists of 4 elements:The polygonal valid output
Cut edges: edges connected on both ends but not part of polygonal output
dangles: edges connected on one end but not part of polygonal output
invalid rings: polygons formed but which are not valid
This function returns the geometries within GeometryCollections. Individual geometries can be obtained using
get_geometry
to get a single geometry orget_parts
to get an array of geometries.- Parameters
- geometriesarray_like
An array of geometries.
- axisint
Axis along which the geometries are polygonized. The default is to perform a reduction over the last dimension of the input array. A 1D array results in a scalar geometry.
- **kwargs
For other keyword-only arguments, see the NumPy ufunc docs.
- Returns
- (polygons, cuts, dangles, invalid)
tuple of 4 GeometryCollections or arrays of GeometryCollections
See also
Examples
>>> from shapely import LineString >>> lines = [ ... LineString([(0, 0), (1, 1)]), ... LineString([(0, 0), (0, 1), (1, 1)]), ... LineString([(0, 1), (1, 1)]) ... ] >>> polygonize_full(lines) (<GEOMETRYCOLLECTION (POLYGON ((1 1, 0 0, 0 1, 1 1)))>, <GEOMETRYCOLLECTION EMPTY>, <GEOMETRYCOLLECTION (LINESTRING (0 1, 1 1))>, <GEOMETRYCOLLECTION EMPTY>)