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《Engineering of Surveying and Mapping》 2011-06
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Data organization and improvement of the LiDAR slope filter based on the two levels of grid

PAN Zhong-hua,CHEN Xing-yi,MEN Lin-jie,LI Xi-ming(Institute of Geophysics and Geomatics,China University of Geosciences,Wuhan 430074,China)  
A method to improve slope fliter based on double-layer grid is presented.This method realizes on two original data grid technology,ground in a grid selected seed point,on this basis,the use of two ground grid point selection,which not only improves the operational efficiency,but also can remove gross errors.In the process of filtering algorithms to improve the slope,the traditional filtering algorithm proposed to improve,and put forward the three slope threshold,effectively overcome the traditional slope filtering algorithm where the undulating terrain of the possible errors.The test results show that the algorithm is fast,and has good filtering effect.The paper shows the comparative results between before filtering with after filtering by experimenting datas from different areas.
【Fund】: 国家863计划资助项目(2007AA092102)
【CateGory Index】: P225.2
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