WWF HydroSHEDS Void-Filled DEM, 3 Arc-Seconds (WWF/HydroSHEDS/03VFDEM)

HydroSHEDS is a mapping product that provides hydrographic information for regional and global-scale applications in a consistent format. It offers a suite of geo-referenced datasets (vector and raster) at various scales, including river networks, watershed boundaries, drainage directions, and flow accumulations. HydroSHEDS is based on elevation data obtained in 2000 by NASA’s Shuttle Radar Topography Mission (SRTM).

This void-filled elevation dataset is the first step towards producing the conditioned DEM datasets. Spikes and wells in the SRTM data were detected and voided out. Small voids were filled by interpolation of surrounding elevations. The ocean was set to an elevation of 0 meters, and lakes, islands, and rivers were filled using other techniques. Full details of the underlying digital elevation model are available in the HydroSHEDS website and documentation.

This dataset is at 3 arc-second resolution. The datasets available at 3 arc-seconds are the Void-Filled DEM, Hydrologically Conditioned DEM, and Drainage (Flow) Direction.