中文摘要：

本文针对虚拟地理环境中注记的特点，研究了注记遮挡的三种类型：注记和注记的遮挡、注记与地形的冲突以及注记和地物的遮挡冲突。为了解决场景中注记遮挡的问题，作者提出了九种方法：剔除法、最小化法、指示线法、移位法、透明符号法、视点变换、注记投影、变形视图、多链接视图等，并对各种解决方法进行对比分析，从制图者和用图者的角度对各种解决方法的表达效果进行满意度评价分析，为解决虚拟地理环境注记遮挡问题提供了重要参考。

英文摘要：

According to characteristics of annotation in virtual geographic environment （ VGE）, three types of annotation oc- clusion are studied in this paper, including occlusion between the annotations, conflict between annotation and terrain, and con- flict between annotation and other ground features. In order to solve the problem of annotation occlusion in the scenes, nine meth- ods are put forward including culling, minimization, indicating line, displacement, transparent symbol, viewpoint conversion, annotation projection, deformation views, multiple linked views and so on, and all solutions are analyzed and compared. The sat- isfaction degree of the expression effect of each solution are evaluated and analyzed, which will provide an important reference for the resolution of annotation occlusion problem in VGE.