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.

發文機構：School of Geodesy and Geomatics Key Laboratory of Geospace Enviromnent and Geodesy

關鍵詞：LODQuad Treeearth＇s gravity fieldsmultiresolution rendering

分類號： P223[天文地球—大地測量學與測量工程][天文地球—測繪科學與技術]