Is there a way to get the DE-9IM matrix between two geometries in a Spatialite function, analogous to the st_relate() function in PostGIS?
(I find it very helpful to spatially join using intersect() and then do a count(*) group by with the DE-9IM matrix to determine what my interesections are like, whether on the edge or not. Then I often calculate the ratio of areas for geometries that don't line up exactly to tell me about slivers.)
For reference:
http://en.wikipedia.org/wiki/DE-9IM
http://postgis.net/docs/ST_Relate.html
أكثر...
(I find it very helpful to spatially join using intersect() and then do a count(*) group by with the DE-9IM matrix to determine what my interesections are like, whether on the edge or not. Then I often calculate the ratio of areas for geometries that don't line up exactly to tell me about slivers.)
For reference:
http://en.wikipedia.org/wiki/DE-9IM
http://postgis.net/docs/ST_Relate.html
أكثر...