The applicability of different sources DEM data in median region terrain correction of gravity in high mountain areas
Sheng-Rong LIU1,2,3, Peng GAO1,2, Tao GENG1,2, Wei-Li GUO1,2, Hui DU1,2
1. Xi’an Center of China Geological Survey, Xi’an 710054, China; 2. Northwest Geological Science and Technology Innovation Center,Xi’an 710054, China; 3. Centre for Orogenic Belt Geology, CGS, Xi’an 710054, China;
Taking the Xiarihamu mining area in Qinghai Province as an alpine experimental area, the authors used the high-precision 1:2,000 DEM data to make a comparative analysis of the vertical accuracy of 1:50,000 DEM data, Aster DEM data and Pleiades DEM data as well as the applicability of these data in median region terrain correction of gravity under the complex terrain conditions such as high mountain areas. The results show that the accuracy of Pleiades DEM is the highest, that of 1:50,000 DEM possesses the second place, and hat of Aster DEM is the lowest under the complex terrain conditions of high mountainous area. The Pleiades DEM data have good applicability in median region terrain correction of gravity scale of 1:50,000 or less, and the 1:50,000 DEM data have good applicability at a scale of 1:200,000 or less, but the Aster DEM cannot meet the accuracy requirements at a scale of 1:200,000 or more.
刘生荣, 高鹏, 耿涛, 郭伟立, 杜辉. 不同源DEM数据在高山区重力中区地形改正中的适用性[J]. 物探与化探, 2019, 43(5): 1111-1118.
Sheng-Rong LIU, Peng GAO, Tao GENG, Wei-Li GUO, Hui DU. The applicability of different sources DEM data in median region terrain correction of gravity in high mountain areas. Geophysical and Geochemical Exploration, 2019, 43(5): 1111-1118.
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