shapely.force_3d

force_3d(geometry, z=0.0, **kwargs)

Forces the dimensionality of a geometry to 3D.

2D geometries will get the provided Z coordinate; Z coordinates of 3D geometries are unchanged (unless they are nan).

Note that for empty geometries, 3D is only supported since GEOS 3.9 and then still only for simple geometries (non-collections).

Parameters:

geometryGeometry or array_like

zfloat or array_like, default 0.0

**kwargs

See NumPy ufunc docs for other keyword arguments.

Examples

>>> from shapely import LineString, Point
>>> force_3d(Point(0, 0), z=3)
<POINT Z (0 0 3)>
>>> force_3d(Point(0, 0, 0), z=3)
<POINT Z (0 0 0)>
>>> force_3d(LineString([(0, 0), (0, 1), (1, 1)]))
<LINESTRING Z (0 0 0, 0 1 0, 1 1 0)>
>>> force_3d(None) is None
True