On Tue, Sep 30, 2008 at 10:55 PM, Tom Kazimiers <[EMAIL PROTECTED]> wrote: > 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?
Tom, In fact there is no GDAL way to do this. You can however manually put a .prj file with an ArcGIS PE string along side the shapefiles. Best regards, -- ---------------------------------------+-------------------------------------- I set the clouds in motion - turn up | Frank Warmerdam, [EMAIL PROTECTED] light and sound - activate the windows | http://pobox.com/~warmerdam and watch the world go round - Rush | Geospatial Programmer for Rent _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
