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Accuracy Assessment of Srtm-Dem Using GpsMeasurments and Gis Techniques | ||
| Engineering and Technology Journal | ||
| Article 1, Volume 28, Issue 24, 2010, Pages 6915-6928 PDF (164.2 K) | ||
| DOI: 10.30684/etj.28.24.7 | ||
| Author | ||
| Ahmed Dhahir Athab | ||
| Abstract | ||
| Shuttle Radar Topographic Mission (SRTM) has created datasets of global elevations that is freely available for modeling and environmental applications. The global availability (almost 80% of the Earth surface) of SRTM data provides baseline information for geospatial applications such as mapping, hydrology, navigation, GIS applications, and reconnaissance. Assessment of the accuracy of SRTM requires regional studies involving points with known elevations at higher level of precision than the SRTM, usually measured with Global Positioning System (GPS). This study based on datasets collected with a differential GPS system in different locations in Iraq. These measurements were corrected with differential methods to reach to sub – centimeter accuracy. Statistical analysis included estimation of absolute errors by Root Mean Square Error (RMSE), Standard Deviation (SD). RMSE was found as (5.15m) for Iraq and the SD was (3.93). This is higher than the standard SRTM-DEM accuracy which is (16m) | ||
| Keywords | ||
| SRTM; spatial join; GPS; accuracy assessment; DEM | ||
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