Hi, unfortunately I have no experience with OGR and want to display a SHP-File (on WinCE, but I don't think that matters). The rendering works well, but is slow - so I will add some caching. One thing of faster rendering is to use SetSpatialFilterRect() I guess. This works, as written in the docs, with comparing the coorinates (they must be in the same coorinate systeme). Sadly, my shp files do not have any SpatialReference (I get NULL returned from OGRLayer::GetSpatialRef() ). If I use SetSpatialFilterRect() with this shp file datasource I will get back absolutely no features. I thought the reason for this could be the missing spatial referenc. So I wonder how to add/change a spatial reference (e. g. a coorinate interpretation, right?) to a layer?
I looked through the mailing list, but found nothing that helped me. Thanks in advance, Tom _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
