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Showing posts from June, 2011

25m SRTM-DEM is now available for download FREE OF CHARGE!

I remember doing our accuracy analysis for ASTER and SRTM DEM for the Philippines for our Remote Sensing class. SRTM still proves to be more accurate at 90m resolution than an ASTER DEM at 30m GSD (Ground Sampling Distance). Now the 25m resolution of XSAR SRTM DEM is out. And it's FREE! This is very promising indeed. I would surely incorporate it in my RS-GIS-Hydrology flooding research. Source: German Aerospace Centre (DLR) When Space Shuttle Endeavour launched on 11 February 2000 for the 'Shuttle Radar Topography Mission' (SRTM), it was carrying two radar antennas; one in the shuttle's payload bay and the other on the end of a 60-metre mast. Over the course of eleven days, researchers at the German Aerospace Center (Deutsches Zentrum für Luft- und Raumfahrt; DLR) acquired data for a three-dimensional terrain model of large areas of the Earth. Now, DLR is making these data available for scientific purposes via EOWEB, free of charge. The SRTM structure was one-of-