unionOrNull

Calculates the union of a collection of geometries. The union combines those parts of the input geometries which overlap into a single geometry.

If the collection contains geometries of differing dimensionality, the geometry with the higher dimensionality is returned. For example, a polygon is returned if the given a collection contains polygons, polylines, and points.

Supports true curves.

Return

The union of all the geometries in the given collection.

Since

200.1.0