geopandas.GeoSeries.delaunay_triangles#

GeoSeries.delaunay_triangles(tolerance=0.0, only_edges=False)[source]#

Returns a GeoSeries consisting of objects representing the computed Delaunay triangulation around the vertices of an input geometry.

The output is a GeometryCollection containing polygons (default) or linestrings (see only_edges).

Returns an empty GeometryCollection if an input geometry contains less than 3 vertices.

Parameters

tolerancefloat | array-like, default 0.0: Snap input vertices together if their distance is less than this value.
only_edgesbool | array_like, (optional, default False): If set to True, the triangulation will return a collection of linestrings instead of polygons.

Examples

>>> from shapely import LineString, MultiPoint, Polygon
>>> s = geopandas.GeoSeries(
...     [
...         MultiPoint([(50, 30), (60, 30), (100, 100)]),
...         Polygon([(50, 30), (60, 30), (100, 100), (50, 30)]),
...         LineString([(50, 30), (60, 30), (100, 100)]),
...     ]
... )
>>> s
0   MULTIPOINT (50.000 30.000, 60.000 30.000, 100....
1   POLYGON ((50.000 30.000, 60.000 30.000, 100.00...
2   LINESTRING (50.000 30.000, 60.000 30.000, 100....
dtype: geometry

>>> s.delaunay_triangles()
0    GEOMETRYCOLLECTION (POLYGON ((50.000 30.000, 6...
1    GEOMETRYCOLLECTION (POLYGON ((50.000 30.000, 6...
2    GEOMETRYCOLLECTION (POLYGON ((50.000 30.000, 6...
dtype: geometry

>>> s.delaunay_triangles(only_edges=True)
0    MULTILINESTRING ((50.000 30.000, 100.000 100.0...
1    MULTILINESTRING ((50.000 30.000, 100.000 100.0...
2    MULTILINESTRING ((50.000 30.000, 100.000 100.0...
dtype: geometry