public IEnumerable<IFeature> GetFeatures(IEnvelope bbox, string filter, double scale)
		{
			IGeometry geom = new Topology.Geometries.Polygon(new LinearRing(new Coordinate[] { new Coordinate(bbox.MinX, bbox.MinY), new Coordinate(bbox.MaxX, bbox.MinY), new Coordinate(bbox.MaxX, bbox.MaxY), new Coordinate(bbox.MinX, bbox.MaxY), new Coordinate(bbox.MinX, bbox.MinY) }));
			return GetFeatures(geom, filter, scale);
		}
        public IEnumerable <IFeature> GetFeatures(IEnvelope bbox, string filter, double scale)
        {
            IGeometry geom = new Topology.Geometries.Polygon(new LinearRing(new Coordinate[] { new Coordinate(bbox.MinX, bbox.MinY), new Coordinate(bbox.MaxX, bbox.MinY), new Coordinate(bbox.MaxX, bbox.MaxY), new Coordinate(bbox.MinX, bbox.MaxY), new Coordinate(bbox.MinX, bbox.MinY) }));

            return(GetFeatures(geom, filter, scale));
        }