Research on triangle subdivision and cell search based on equilateral octahedron

摘要：

On the basis of the equilateral octahedron in the sphere,the global is recursively subdivided.With level of subdivision increasing,subdivision speed will descend markedly.So for the deeper hierarchy of subdivision,local subdivision is chosen.After the sphere is divided,to display the proper area,the correct cells should be found.So when the specific region is showed,its central cell needs to be as initial search cell to find grid cells within a certain range,and then show.Grid cells after subdivided can not achieve the ideal that the cells have the equal area and the equal shape,which affects the effect of display and the accuracy of search.Through the analysis of cell distortion,it is known that the basic attributes of cells distribute according to a certain law.With level of subdivision increasing,the changes tend to be stable which ensures the reliability of the deeper levels subdivision.

关键词： triangle subdivision cell search the equilateral octahedron discrete global grid

作者: Zhang Shengmao Wu Jianping Gan Jiayuan

作者单位: Key Laboratory of Geo-information Science of the Ministry of Education,East China Normal University,Shanghai,China,200062

会议类型: 国际会议

会议名称: 第16届国际地理信息科学与技术大会(16th International Conference on GeoInformatics and the Joint Conference)

会议地点: 广州

会议语种:英文

在线出版日期: 2008-06-28（万方平台首次上网日期，不代表论文的发表时间）