针对扫描矢量化这一数据采集手段，以提高图像质量、数据精度为目的，以教学模型为基础，利用最小二乘原理，详细讨论了扫描后的地形图几何纠正算法。
This paper discussed in detail algorithm of geometric rectification by scanned topographic map based on teaching model with least squares method to heighten image quality and data accuracy.
详细阐述了有限元模型转换相对于几何模型转换的优势，以及其实现方法和途径。
The advantages of finite element model transformation relative to geometry model transformation and the ways realized in finite element model transformation were also expatiated in detail.
重点对几何形态建模、纹理映射建模等技术进行了较为详细的论述，并建成了“虚拟小区”3维视景模型。
This article focuses on the techniques of configuration modeling, texture mapping, and builds a 3d model named "virtual residential district".
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