Hello everybody; I am using the OGR library to extract depth and land areas from an ENC file (S-57 format).
What I want to do is to query whether a given point is on land or is on a depth area. For this purpose, I have to call OGRGeometry::Intersects or OGRGeometry::Contains functions for every polygon feature on one of these layers. (similarly, setting the point by SetSpatialFilter on one of these layers also does the job) I tried these and they work quite OK, but unfortunately quite inefficient at the same time. Is there anybody who can offer any tips or references about efficient querying? Best regards, Yilmaz _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
