Changes between Version 3 and Version 4 of DevClusteringFunctions
- Timestamp:
- Jan 26, 2015, 4:20:55 PM (10 years ago)
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DevClusteringFunctions
v3 v4 3 3 ---- 4 4 5 {{{geometry[] ST_ AccumIntersecting(geometry geom)}}}5 {{{geometry[] ST_ClusterIntersecting(geometry geom)}}} 6 6 7 7 Aggregate function returning an array of GeometryCollections representing the connected components of a set of geometries. … … 17 17 18 18 19 {{{geometry[] ST_ AccumWithinDistance(geometry geom, double precision distance)}}}19 {{{geometry[] ST_ClusterWithin(geometry geom, double precision distance)}}} 20 20 21 21 Aggregate function returning an array of GeometryCollections?/MultiPoints?, where any component is reachable from any other component with jump of no more than the specified distance. 22 22 23 - like ST_ AccumIntersecting, but uses a distance threshold rather than intersection when determining if two geometries should be included in the same component. Could have an implementation very similar to ST_AccumIntersecting, or could be restricted to points and maybe have a more efficient implementation.[[br]]23 - like ST_ClusterIntersecting, but uses a distance threshold rather than intersection when determining if two geometries should be included in the same component. Could have an implementation very similar to ST_ClusterIntersecting, or could be restricted to points and maybe have a more efficient implementation.[[br]] 24 24 - differs from kmeans in that a distance is provided, not a number of clusters[[br]] 25 25