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(3dUGIS)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.
将变密度三维海水入侵模型(SUTRA模型)与地理信息系统(GIS)进行有机集成开发出可视化海水入侵数值模拟系统。
A visualized numerical modeling system is developed on the basis of the 3-d seawater intrusion numerical model (SUTRA) integrated in GIS platform.
构造城市实物模型是三维城市地理信息系统(3dUGIS)解决的关键问题之一。
Building practicality model of city spatial objects is a key question which should be solved in 3d UGIS.
地形景观模型的三维可视化技术是时空一体化地理信息系统与虚拟现实中的关键技术。
The technique of 3d visualization of terrain sight model is an important technique of spatial-temporal GIS and VR.
在三维地理信息系统的开发与研究中，要求三角网模型的支持，而高效的三角网生成算法是三角网模型的基础。
The support of TIN model is required in the development and research of 3d GIS, while an efficient TIN algorithm is the foundation of the TIN model.
在三维地理信息系统的开发与研究中，要求三角网模型的支持，而高效的三角网生成算法是三角网模型的基础。
The support of TIN model is required in the development and research of 3d GIS, while an efficient TIN algorithm is the foundation of the TIN model.
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