This PR removes the need for one intermediate raster while creating DEM products (now directly using a VRT).
Also updated RenderDEM to skip generation of blank tiles (common with corridor datasets) and added compression where needed to reduce file sizes and disk I/O.
This PR removes the need for one intermediate raster while creating DEM products (now directly using a VRT).
Also updated RenderDEM to skip generation of blank tiles (common with corridor datasets) and added compression where needed to reduce file sizes and disk I/O.