D terrain landscapes construction method is discussed.
主要探讨了三维地形景观的建立。
Then the method of 3-d terrain modeling based on regular grid is studied.
然后研究了基于规则格网的三维地形建模方法。
The study on 3 D Terrain VR is a hot topic in Computer Graphic, Geographic Information System and Digital Photogrammetry.
三维地形虚拟现实技术是当前计算机图形学、地理信息系统和数字摄影测量技术研究的热点问题。
By using these two methods, hidden surfaces are removed effectively. After shading treatment 3-d terrain pictures reflecting the real situation and remote sensing images are obtained.
这两种方法都能有效地进行隐面消除，并通过明暗处理获得了真实感较强的立体地形图和三维遥感图。
A 3-d mesoscale Planetary boundary layer (PBL) dynamics prognostic in complex terrain was established to simulate 3-d mesoscale flow field under local sea-land breeze circulation.
首先建立了一个复杂地形条件下的中尺度三维边界层预报模式，模拟研究了局地海陆风环流条件下的三维风场。
The test showed that the average production time overlapped by the complex terrain of buildings, roads and vegetation is 15.96 seconds, thus realized the roam in the complex 3-d scene fluently.
测试得知，叠加了建筑物、道路、植被的复杂地形的平均生成时间为15.96秒，实现了复杂三维场景的流畅漫游。
Combined with the topographic and physiognomic maps of natural terrains, a 3-D model which generates the geometrical structures of complex terrain, has been developed.
结合自然地表的地形地貌图，建立了复杂自然地表三维几何结构生成模型。
Combined with the topographic and physiognomic maps of natural terrains, a 3-D model which generates the geometrical structures of complex terrain, has been developed.
结合自然地表的地形地貌图，建立了复杂自然地表三维几何结构生成模型。
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