public static List <Geometry.Vector> buildgrid(Extents extents)
{
// 测试代码
// ga.buildgrid(mc.MapExtents)
//var parcels = DocumentManager.CurrentMap.Layers["地块"].Features.Select(f=>new Geometry.Polygon(f.GeoData)).ToList();
grid = extents.GetGrid(cellsize); //.Where(p => parcels.Any(x => x.IsPointIn(p))).ToList();
_layer = new VectorLayer("grid", VectorLayer.GEOTYPE_REGION);
grid.ForEach(p => _layer.Features.Add(getcellfeature(p)));
MapControl.Current.GridLayer.SetData(_layer);
return(grid);
}