本文提出了三维地理信息系统中几何特征的误差模型。
This paper presents the error models developed for handling geometric features in three dimensional Geographical Information Systems.
实现了海洋地理信息三维模型库的分类管理。
Classification and management of 3d models of ocean geographic information are implemented.
构造城市实物模型是三维城市地理信息系统(3d UGIS)应该解决的关键问题。
Building practicality model of city spatial objects is a key question which should be solved in 3d UGIS.
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