Section outline

    • Download SRTM tiles from USGS Earth Explorer

    • Download ASTER GDEM form NASA Earth Data

    • This data set is a global digital surface model (DSM) with horizontal resolution of approximately 30 meters (basically 1 arcsecond) by the Panchromatic Remote-sensing Instrument for Stereo Mapping (PRISM), which was an optical sensor on board the Advanced Land Observing Satellite "ALOS".