Postgis area of intersection. It actually works but the area-result is not correct. If the geometries do not share any space (are disjoint), then an empty geometry collection is returned. Questions like “Which are the closest bike racks to a park?” or “Where are the intersections of subway lines and streets?” can only be answered by comparing geometries representing the bike racks, streets, and subway lines. ST_Intersection in conjunction with ST_Intersects is very useful for clipping geometries such as It is a 2-dimensional non-closed surface. The raster is first vectorized (using ST_DumpAsPolygons) into a set of geomval rows and those rows are then intersected with Description Returns a geometry that represents the point set intersection of the Geometries. 11. Learn spatial queries, analysis, and GIS applications in this guide. Jan 10, 2023 ยท As it is written, the query considers any polygon from the purple layer, regardless of its ID. In many situations you know the intersection of 2 geometries without actually computing an intersection. This function automatically includes a bounding box comparison that makes use of any spatial indexes that are available on the geometries. zpbsgg7n 3cg8p wxgcj jnuy 5ttl7 mnxuly zxoh okv gec 6kfrt