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A specialized hydrographic dataset derived from 90m DEMs that maps global river networks, basins, and streamflow with high precision. Key Technical Specifications

The "90m" refers to the pixel spacing at the equator. In geographic terms, this corresponds to 3 arc-seconds . Download (90M)

This is a widely used, "void-filled" version of the original NASA data. It has been processed to remove gaps caused by radar shadows or water bodies, making it more reliable for hydrological and topographical analysis. A specialized hydrographic dataset derived from 90m DEMs

These models typically cover Earth's landmasses from pole to pole (TanDEM-X) or between 60°N and 56°S latitudes (SRTM). This is a widely used, "void-filled" version of

A more recent global product from the German Aerospace Center (DLR), which offers higher vertical accuracy (often around 1 meter) compared to the older SRTM standards.

The SRTM 90m digital elevation database is primarily used for: 90 m water body map using multi-temporal Landsat images

Downloads are standardly provided in GeoTIFF or ArcInfo ASCII formats, allowing for easy integration into software like ArcGIS or QGIS. Common Applications