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《BULLETIN OF SOIL AND WATER CONSERVATION》 1999-03
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Application of 4D Technologyin Watershed Management

YAN HuiminLI Bicheng (Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, YanglingDistrict, Shaanxi Province, 712100, PRC)  
D is described and the wide prospects on soil and water conservation are discussed.4D is called as the integrated technology of RS and GIS at 1990s level, it is the basic mode of digltalized product. 4D include DEM (digital elevation model), DOQ (digital orthophotoquad), DRG (digital raster grapher) and DLG/DTI (digital liner grapher), Which provide real time and precise digitalized product for watershed management.
【Fund】: 国家“九五”科技攻关课题
【CateGory Index】: TP79
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