PostGIS

ST_ApproximateMedialAxis — Compute the approximate medial axis of an areal geometry.

geometry +`*`+ST_ApproximateMedialAxis*(`geometry `geom`)`;

Return an approximate medial axis for the areal input based on its straight skeleton. Uses an SFCGAL specific API when built against a capable version (1.2.0+). Otherwise the function is just a wrapper around ST_StraightSkeleton (slower case).

Availability: 2.2.0

This method needs SFCGAL backend.

This function supports 3d and will not drop the z-index.

This function supports Polyhedral surfaces.

This function supports Triangles and Triangulated Irregular Network Surfaces (TIN).

ST_StraightSkeleton