期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2008
卷号：XXXVII Part B2
页码：981-984
出版社：Copernicus Publications
摘要：Based on the research of the automatic annotation placement in two-dimensional (2D) domain, automatic annotation rules of point feature in the three-dimensional (3D) field are proposed. In this paper, the quad-tree index is used to organize the 1:250 thousands vector map attributes data of China. Backing culling, view culling and overlap culling are introduced to decide whether the annotation is display or not. This method can reduce the displaying annotation in a great extent and improve the efficiency of this system. A 3D earth system is developed as a prototype. Annotation position is determined by the billboard technology which is widely used in 3D domain. Backtracking algorithm are employed to figure out the automatic annotation placement
关键词：Geography; Cartography; Three-dimensional; Visualization; Virtual Reality; System
