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has been cited by the following article:

• TITLE: Assessment of Remotely Sensed Digital Elevation Models (DEMs) Compared with DGPS Elevation Data and Its Influence on Topographic Attributes

  AUTHORS: Moawad Badawy Moawad, Ahmed Omar Abd El Aziz

  KEYWORDS: SRTM, ASTER GDEM, RTK System, Error Assessment, Topographic Attributes

  JOURNAL NAME: Advances in Remote Sensing, Vol.7 No.2, June 29, 2018

  ABSTRACT: Accuracy and quality of DEM are of a great interest for a wide range of applications. In this study, quality of ASTER GDEM and SRTM DEMs were assessed in comparison with DGPS measurements. Impact of DEM resolution upon the accuracy of terrain representation and topographic attributes was also discussed. The study deduced that vertical error has a strong effect on error propagation and this highly obvious in higher elevations as the absolute standard error (SE) ranges between is ±0 - 2.5 and ±0 - 2.4 m for ASTER GDEM and SRTM respectively. This is reflected on slope and aspect as the vertical errors increase and uncertainty is relatively high in flat and low areas. Error propagation in low lands influenced drainage extraction and resulted in isolated and truncated water courses.