然后研究了基于规则格网的三维地形建模方法。
Then the method of 3-d terrain modeling based on regular grid is studied.
本论文从分形布朗运动，三维地形建模和虚拟环境三个方面逐步进行了深入讨论。
The three aspect of the dissertation was discussed: fractal Brownian motion, 3D modeling and visual environment.
三维地形建模及可视化是GIS、计算机图形学、虚拟现实、数字摄影测量等领域的研究热点。
3d terrain modeling and visualization are hot research topics in GIS, computer graphics, virtual reality, digital photogrammetry and other associated fields.
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