The Global TanDEM-X High-Resolution Coastline Product

Kurzfassung

The study presents a globally consistent, high-resolution coastline dataset derived from the 10 m TanDEM-X digital elevation model (DEM). The coastline was automatically extracted, then manually refined to ensure hydrological consistency, mapping approximately 1.91 million km of coastline and 396,543 islands. Validation against existing global and national datasets showed mean positional deviations and standard deviations of 13 to 35 m relative to high-accuracy local references. Larger uncertainties occur along sandy coasts, tidal flats, and transitional water bodies. The dataset provides a valuable resource for coastal mapping, DEM refinement, and global hydrographic applications.