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《Science of Surveying and Mapping》 2010-01
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Information extraction of surface crack position in mining subsidence area based on wavelet transform

LI Liang①②,WU Kan①②,CHEN Ran-li①②,ZHANG Shu①②(①College of Environment Science and Spatial Informatics,China University of Mining & Technology,Xuzhou 221008,China,②Jiangsu Key Laboratory of Resources and Environmental Information Engineering,Xuzhou 221008,China)  
As a new surveying method,the three-dimensional scan technology has high efficiency and high precision.There is plentiful useful information in the vast data obtained by this method.How to get the necessary information from the data is a research hotspot.Based on the characteristic of the 3D laser scanning data gotten from mining subsidence area,this paper distinguished the surface creak position using wavelet transform.Comparing with surveying data,it showed that appropriate wavelet can distinguish the position of surface crack,which will offer technology support for further work.
【Fund】: 国家科技支撑计划项目“城市废弃工矿区土地再利用技术研究”(2006BAJ14B07)
【CateGory Index】: TD325
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