Abstract
DEM is the basis of processing extraction of Digital relief maps. The goal of this study is evaluation of free DEM to extract contour lines, the quality and accuracy of DEM, and comfortable with the standard contour maps of scale 1:50,000 to represent the topography of the land surface, and Cartography comparison to contour from DEM and contour lines from topography maps. This study uses quantitative methods and statistics it is based on Root Mean Square Error (RMSE) and Mean Error (ME). So, this Study focuses on Visualization evaluation of results of the analysis of DEM. Consideration of the accuracy of a degree of simulation of extraction contour lines from DEM and original contour lines. The accuracy was studied using 3330 elevation points using a topographic map. Results indicate that SRTM DEM, and ASTER GDEM both may be used in generation contour maps with a scale 1:50,000, so RMSE to SRTM, ASTER is 6.6 m and 8.6 m and ME is 5.1 m and 5.5 m respectively. the quality analysis showed that agreement output from free DEM with the standard accuracy of contour map 1:50,000 so can you depend on free DEM to extract a contour line with a contour interval 10 m or 20 m with scale 1:50,000 with 5 m to 10 m of the accuracy. The cartographic analysis of contour lines produced from free DEM is characterized by its compatibility with the cartographic rules for contour lines and the absence of distortions and many abnormal phenomena in it, especially when using the Global mapper program, as well as the higher details of the data of the ASTER GDEM model than the SRTM model.
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Ismail, K., Fozy, M. (2023). An Evaluation and Accuracy of SRTM and ASTER GDEM to Generation of Contour Lines. In: Gad, A.A., Elfiky, D., Negm, A., Elbeih, S. (eds) Applications of Remote Sensing and GIS Based on an Innovative Vision . ICRSSSA 2022. Springer Proceedings in Earth and Environmental Sciences. Springer, Cham. https://doi.org/10.1007/978-3-031-40447-4_14
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DOI: https://doi.org/10.1007/978-3-031-40447-4_14
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