Modeling of Earth＇s Gravity Fields Visualization Based on Quad Tree

作者：LUO Zhicai,LI Zhenhai,ZHONG Bo

摘要：The problems of the earth's gravity fields' visualization are both focus and puzzle currently. Aiming at multiresolution rendering, modeling of the Earth's gravity fields' data is discussed in the paper by using LOD algorithm based on Quad Tree. First, this paper employed the method of LOD based on Quad Tree to divide up the regional gravity anomaly data, introduced the combined node evaluation system that was composed of viewpoint related and roughness related systems, and then eliminated the T-cracks that appeared among the gravity anomaly data grids with different resolutions. The test results demonstrated that the gravity anomaly data grids' rendering effects were living, and the computational power was low. Therefore, the proposed algorithm was a suitable method for modeling the gravity anomaly data and has potential applications in visualization of the earth's gravity fields.

发文机构：School of Geodesy and Geomatics Key Laboratory of Geospace Enviromnent and Geodesy

关键词：LODQuad Treeearth＇s gravity fieldsmultiresolution rendering

分类号： P223[天文地球—大地测量学与测量工程][天文地球—测绘科学与技术]