首次提出了基于多分辨率渐进层提取的三维地形模型纹理数据建立和渐进传输的方法。
The method of constructing and progressively transmitting 3D terrain texture data based on multi-resolution progressive layers is put forward for the first time.
其次，重点研究了三维城市模型的构建，包括三维地形模型的建立，卫星影像与三维地形模型的融合。
Secondly, put more emphasis on the reconstruction of 3D city model, which involves the 3D terrain and the fuse of Ikonos and terrain.
建立合理的三维地形模型，对于实现实时绘制虚拟地形场景，逼真模拟地形环境，实现虚拟地形环境中的分析功能及其它相关控制有着重要的意义。
It is significant to construct a suitable terrain model for real-time rendering terrain scene, simulating terrain environment in reality and achieving analysis functionality in VTE.
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