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《Science of Surveying and Mapping》 2004-03
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A comparison on DEM of different scale in loess hill and gully area

CHEN Nan, LIN Zong-jian, LI Cheng-ming, TANG Guo-an, XU Zeng-rang (Geoinformation Science & Engineering College, Shandong University of Science and Technology, Tai'an 271019, China; Chinese Academy of Surveying and Mapping,Beijing 100039,China; Department of Urban and Resource, Northwest University,Xi'an 710069,China)  
A series of experiments ware made to investigate the accuracy of topographic variables derived from DEMs of 1: 50000 map scaled and with a 5m horizontal resolution by means of a careful comparison with 1:10000 scaled DEMs of the same area. Taking Jiuyan area, from Suide county Shanxi Province P. R. China, as a test area and ARC/VIEW 3.1 as a main working platform, the results show different errors can be found in all three topographic variables, such as slope gradient, aspect of surface and accumulation. The results of this study can be used to guide the error-rectifying and the accuracy-evaluating of the DEMs in practical applications.
【Fund】: 国家自然科学基金(49971065);; 测绘遥感信息工程国家重点实验室开放研究基金(WKL99-0320)
【CateGory Index】: P208
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