[Gdal-dev] OGR C API question

[Markus Neteler]

On Mon, Mar 22, 2004 at 09:53:21AM -0500, Frank Warmerdam wrote:
> Markus Neteler wrote:
> >	poSpatialFilter = OGR_G_CreateGeometry( wkbPolygon );
> >	Ogr_oRing = OGR_G_CreateGeometry( wkbLineString );
> >        OGR_G_AddPoint(Ogr_oRing, xmin, ymin, 0);
> >        OGR_G_AddPoint(Ogr_oRing, xmin, ymax, 0);
> >        OGR_G_AddPoint(Ogr_oRing, xmax, ymax, 0);
> >        OGR_G_AddPoint(Ogr_oRing, xmax, ymin, 0);
> >        OGR_G_AddPoint(Ogr_oRing, xmin, ymin, 0);
> >        OGR_G_AddGeometryDirectly(poSpatialFilter, Ogr_oRing);
> >	
> >        OGR_L_SetSpatialFilter(Ogr_layer, poSpatialFilter );
> >
> >Does anyone see why this doesn't work any longer? The spatial filter is
> >simply ignored.
> 
> Markus,
> 
> The wkbLineString should be wkbLinearRing. It looks like the
> AddGeometryDirectly() method returns OGRERR_UNSUPPORTED_GEOMETRY_TYPE if
> you pass anything other than a wkbLinearRing to add to a polygon.   The
> checking may have been added after the initial implementation though I see
> nothing obvious in the change logs.

Great, now it works smoothly (tried with SHAPE, hope it does as well
with PostGIS data).

Thanks,
 
 Markus