Abstract
Automatic and quickly extraction of bridge information from LiDAR data is of great significance in building 3D digital city and virtual earth. Especially the extraction of bridge outline is a crucial problem. It is a concern of many scholars research focus. This paper presented a method of bridge extraction using airborne LiDAR data. The biggest advantage of the method is based on priori-knowledge and by analyzing the spatial structural characteristics and geometric characteristics of the bridge. Experiments show that this method has a good accuracy compared with the result of expert interpretation.
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