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IMPROVE QUALITY OF GLOBAL DEM FOR TOPOGRAPHIC MAPPING: CASE STUDY OF PETCHABURI PROVINCE, THAILAND |
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| รหัสดีโอไอ | |
| Creator | Kritsada Anantakarn, Phongphoom Sornchomkaew, Thongchai Phothong |
| Title | IMPROVE QUALITY OF GLOBAL DEM FOR TOPOGRAPHIC MAPPING: CASE STUDY OF PETCHABURI PROVINCE, THAILAND |
| Contributor | - |
| Publisher | TuEngr Group |
| Publication Year | 2562 |
| Journal Title | International Transaction Journal of Engineering, Management, & Applied Sciences & Technologies |
| Journal Vol. | 10 |
| Journal No. | 9 |
| Page no. | 10A09H: 1-9 |
| Keyword | Radar, SRTM, GNSS, LBand, accuracy, GCP, topography, RMS error. |
| URL Website | http://tuengr.com/Vol10_9.html |
| Website title | ITJEMAST V10(8) 2019 @ TuEngr.com |
| ISSN | 2228-9860 |
| Abstract | This research investigates the Shuttle Radar Topography Mission (SRTM) Version 3 Global 30m produced by The National Aeronautics and Space Administration (NASA). As one of the free download data sources from the internet, it is widely used for topographic mapping with global scale of accuracy from North America and Europe test sites. However, there is lack of local accuracy assessment and verification for SRTM data as in Southeast Asia and Thailand due to the absence of Global Positioning System (GPS) benchmarks used as sources of Ground Control Points (GCP). This research used GNSS L-band global correction service ATLAS? (Hemisphere) for building the GPS trajectory as a source of GCP for assessment and improving accuracy of SRTM Version 3 data. The result shows that absolute vertical accuracy was achieved less than Vertical RMS 1.3 meters in comparing with relative vertical RMS 8.7 meters in Euro-Asia continent accuracy scale as announced in SRTM data specification. These results and method can be useful for engineers who apply DEMs for various applications such as updating topographic map for landscape design and rural - urban development project in Thailand. |
