Extract an accurate river network

<p>Due to the limited resolution of freely available digital elevation models (DEM), DEM-derived river products cannot provide accurate flow lines in inland and lowland areas. Stream burning is used to improve the accuracy of extracted flowlines in addition to other flow routing algorithms (from LSDTopotools). Using the latest DEM products (Copernicus 30m DEM and FAB 30m DEM) and other remote sensing data (Sentinel-1, Sentinel-2), the framework is tested on different geomorphological features (meanders, branches) and weather conditions (with and without clouds). The results show a significant improvement in the accuracy of the flow lines compared with existing global hydrography products.</p>