A Global Lakes/Reservoirs Surface Extent Dataset (GLRSED)V1.2

The Global Lakes/Reservoirs Surface Extent Dataset (GLRSED) contains spatial extent of 2.17 million individual features. Each uniquely-recognized lakes/reservoirs polygon in the GLRSED database has a set of morphometric attributes: area, perimeter, continent, source ID, the number of features merged, depth, categories of lakes related to location, etc. The GLRSED was mainly produced based on HydroLAKES and OpenStreetMap (OSM). By spatially overlaying with mountain polygon data, the lakes/reservoirs located in mountainous areas were identified. Four datasets, including the GRanD, Global geReferenced Database of Dams (GOODD), Georeferenced Global Dams and Reserves (GeoDAR) dataset, and the OSM, were used to partition reservoirs from natural lakes. The lakes/reservoirs on the rivers were identified by overlaying with the SWOT Mission River Database (SWORD). By using the same method, endorheic, glacier-fed and permafrost-fed lakes/reservoirs were identified. By spatially joining our dataset with SWOT orbits, the number of orbits passing on each lake/reservoir was calculated.