The Development and Evaluation of the Global Digital Terrain Model DTM2002
Abstract. DTM2002 is a new global Digital Ter-rain Model (DTM). It combines elevations from GLOBE (which originate primarily from NIMA′s DTED), altimetry/geoid model-derived elevations from ACE and from GSFC′s Greenland and Ant-arctic database, and bathymetry from the predictions of Smith and Sandwe...
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.540.8205 http://olimpia.topo.auth.gr/GG2002/SESSION2/Saleh%26Pavlis.pdf |
| Summary: | Abstract. DTM2002 is a new global Digital Ter-rain Model (DTM). It combines elevations from GLOBE (which originate primarily from NIMA′s DTED), altimetry/geoid model-derived elevations from ACE and from GSFC′s Greenland and Ant-arctic database, and bathymetry from the predictions of Smith and Sandwell (1997) supplemented by JGP95E values. Improved 30 ″ depths for the Great Lakes and recent ice thickness estimates have also been incorporated. The coastline and certain land types were enforced based on the shoreline database of Wessel and Smith (1996). DTM2002 was com-piled in a 30 ″ version that provides surface eleva-tions and ocean depths only, and in 2 ′ and 5 ′ ver-sions that include depth data for certain large lakes and ice thickness information. This paper describes the compilation of DTM2002 with emphasis on the evaluation and merging of the different sources of elevation information. |
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