I've imported some data in a Postgis database and some of the geometries are reported invalid (ST_IsValidReason reports self-intersection or ring self-intersection). The queries I am performing don't ...
How can I find a point that is guaranteed to be within a given polygon in PostGIS? I am aware of the ST_Centroid function. However, the centroid is not always within a polygon, see below: ...
I am looking for a function that will return the intersection of 2 or more polygons (geography type). I am aware of ST_UNION, ST_COLLECT but it works only for geometry type. Any tip will be really ...
Open .NET implementation of the OGC Geometry Object Model from Simple Feature Access 1 specification?
I am looking for a .NET implementation of the geometry object model described in OGS's Simple Feature Access, Part 1 specification. Preferably lightweight. I don't need WKT support, just the ...