📄️ ST_Buffer
Create buffer polygon around geometry
📄️ ST_Centroid
Calculate centroid point of a geometry
📄️ ST_Envelope
Compute bounding box of a geometry
📄️ ST_ConvexHull
Compute convex hull of a geometry
📄️ ST_Boundary
Compute boundary of a geometry
📄️ ST_PointOnSurface
Get a point guaranteed to be on the surface
📄️ ST_Simplify
Douglas-Peucker simplification
📄️ ST_SimplifyPreserveTopology
Topology-preserving simplification