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《Engineering of Surveying and Mapping》 2012-03
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Research on modeling and hill shading of regular grid DEM

XUE Zhi-wei1,2,WANG Fu-qiang1,3,MA Jun1,4,CAO Kun1,5,XU Yong-gang2(1.Institute of Surveying and Mapping,Information Engineering University,Zhengzhou 450052,China;2.63710 Troops,Kelan 036301,China;3.78138 Troops,Chengdu 610036,China;4.61363 Troops,Xi'an 710054,China;5.Army Institute of Nanchang,Nanchang 330103,China)  
DEM data is an important data source that generates shaded-relief map.The conventional methods of regular grid DEM in generating shaded-relief map is to use diagonal triangulation method to establish surface model and add lighting.The paper analyzes the advantages and disadvantages of conventional modeling methods in automatic hill-shading,and tries to improve conventional modeling methods by using free-form surface modeling methods so as to generate shaded relief map with strong stereoscopic sensation and soft changes of light.In the end,the paper makes an analysis about the adaptability of different modeling methods.
【CateGory Index】: P20
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