LI Jingzhong, LI Donglin. A DEM Generalization by Catchment Area Combination[J]. Geomatics and Information Science of Wuhan University, 2015, 40(8): 1095-1099. DOI: 10.13203/j.whugis20130558
Citation: LI Jingzhong, LI Donglin. A DEM Generalization by Catchment Area Combination[J]. Geomatics and Information Science of Wuhan University, 2015, 40(8): 1095-1099. DOI: 10.13203/j.whugis20130558

A DEM Generalization by Catchment Area Combination

Funds: The National Natural Science Foundation of China,No.41001229;the National High Technology Research and De-velopment Program of China(863Program),No.2012AA12A404;State Key Laboratory of Information Engineering in Surveying,Map-ping and Remote Sensing Foundation,No.11I03;Virtual Geographic Environment,Ministry of Education Key Laboratory of FundedProjects,No.2012VGE03;National Science Talents Fund“Geographical Sciences,Wuhan University of Science Base”Research Capaci-ty Training Program,No.J1103409.
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  • Author Bio:

    LI Jingzhong,PhD,associate professor,specializes in the DEM analysis and multiple representations of spatial data.;

  • Received Date: October 10, 2013
  • Revised Date: August 04, 2015
  • Published Date: August 04, 2015
  • This paper presents a structured DEM generalization by catchment area combination.Thevalley catchment areas are used as the link between the abstract conception of valley and concreteDEM grid points.The minor valley branches are deleted by the Tpfer law and the valley catchmentareas are combined based on the deleted valley network.Then the resulting DEM is interpolated basedon the catchment boundary line(containing three types of basic terrain skeleton information:ridge,mountain and saddle)and the valley line.Experiments show that a DEM reconstructed by this methodcan delete minor terrain characteristics while preserving main characteristics.
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