Refined global river network and catchment delineations from TanDEM-X elevation data
We are currently developing HydroSHEDS v2 using 12m resolution TanDEM-X (TerraSAR-X add-on for Digital Elevation Measurement) data with full global coverage. HydroSHEDS v2 improves upon the quality and limitations of HydroSHEDS v1. In particular, coverage above 60° northern latitude (i.e., largely the Arctic) is missing for the 3 arc-second HydroSHEDS v1 product and is of low quality for coarser products because no SRTM elevation data are available for this region. Also, some areas are affected by inherent data gaps or other errors that could not be fully resolved at the time of creating version 1 of HydroSHEDS.