Comparison of SRTM DEM and ASTER GDEM over the Lebanese territory (original) (raw)
Digital elevation models derived from satellite sensors, as SRTM(Space Shuttle Radar Topography Mission) and ASTER (Advance Space borne Thermal Emission and Reflection Radiometer) are freely available on the internet and over the last few years have been used by several researchers. The main scope of the work is to assess the accuracy of the tested ASTER and SRTM products over the Lebanese territory by a comparison with 50 ground elevation points taken from topographic maps, in order to understand potentials of such DEMs and have the ability to select the appropriate one for different geographical applications. Until now, DEM users especially students would often apply the DEM as a truth surface rather than as a model without studying it characteristics and taking a primary idea about its vertical accuracy, this comparison is one among a wide research results which can be an answer for which DEM is more suitable for geographic researches.
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