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It is well know that geometric filters for points cloud can only go so far when removing above-ground phenomena for it's difficult to determine whether a laser point has hit a special object when only spatial analysis is included. And comparing to the discrete points cloud, the high quality, large-coverage images provided by aerial cameras is a very important advantage of photogrammetry, which can...
The displacement operator is an important and still a hot topic in map generalization. In the generalization product, symbols must be unambiguous and easily perceived and readily understood, which makes space competition among features an important obstacle in the process of map objects displacement. Space conflict between objects, through propagation process, may be spread and more objects may drift...
This paper presents a method for simple regular building reconstruction from LIDAR point cloud. At First, TIN model of the extracted building point from discrete LIDAR point cloud is built. Those points in triangle facet which having the similar normal vector value are clustered into the same plane point set. Then, every plane point set is fitted into plane using the least square method which boundary...
In this paper, the mixed modeling method combining surface modeling and volume modeling is used to construct urban subsurface geological structure firstly using existing technique of 3D modeling and visualization for reference, which considers effectively the layer and block structure characteristic inside urban subsurface geological body. Then, volume visualization scheme is designed and 3D volume...
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