Accuracy Assessment of Aster and Srtm Data W.R.T Lidar Data for Jeddah City- Ksa
A. M. Abdel-Wahab

A. M. Abdel-Wahab *, Civil Engineering Department, National Research Centre, Egypt(NRC).

Manuscript received on November 13, 2019. | Revised Manuscript received on 24 November, 2019. | Manuscript published on December 10, 2019. | PP: 593-603 | Volume-9 Issue-2, December 2019. | Retrieval Number: B6543129219/2019©BEIESP | DOI: 10.35940/ijitee.B6543.129219
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Abstract: Most of Civil Engineering projects and Earthworks need a Digital Elevation Models (DEM), such as: infrastructure, utilities, flood hazard determination, road design, and watershed management. Furthermore, Digital Elevation Models are very important for geodetic applications and the knowledge of the earth’s surface topography as well as the field of Earth sciences. In the current research work, a comparative study will be done to evaluate the accuracy come out from two available sources of DEMs. Also, this research will assess their suitability in engineering applications in the Jeddah city (KSA). Two Global DEM (GDEM) have been focused, the first one is the ASTER and the second one is SRTM3 with respect to LIDAR Data for the same regions. The current study will concentrate on the accuracy assessment of SRTM and ASTER Data in Jeddah, KSA. The obtained result from this current research (study areas of North East, Medal East and South East) of Jeddah city for ASTER data has an accuracy inversely proportional with the roughness factor. Also, the accuracy of SRTM is an inversely proportional with the roughness factor. In this context, in flat terrain the accuracy is between about 1 m to about 2.5m, and about 5m to10 m for rolling terrain. However, it’s about 20m to 30 m for mountainous terrain for ASTER data. On other words, the accuracy of SRTM on flat terrain is between about 0.5 m to less than 1.8 m, and about 6.5m to10. 5 m for rolling terrain. However, it’s about 23m to 30 m for mountainous terrain. Finally, the research work is obtained that, in flat terrain, the accuracy of SRTM data is less than the accuracy of ASTER data. But the comparative accuracy between them is approximately the same for rolling terrain. However, for mountainous terrain the accuracy of ASTER data is almost better than the accuracy of SRTM data. 
Keywords: (LiDAR), (DEM), (SRTM), (ASTER),(Terrain Classification).
Scope of the Article: Classification