讨论了用扫描法将地图数字化时，以图廓点为参考点建立形变校正系统的问题。
This paper discussed the way that sets up the system of deformation correction while making the map digital with scanning, by using point of map margin as reference.
然而，利用体积交技术由正交三轮廓图生成三维客体的线性八元树表示取决于观察点。
However, the linear octree structure for generating the representation of 3-d objects from three orthogonal views by using the volume intersection technique is dependent on viewpoints.
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