DEM Precision Inspection And Quality Appraisal System Research

DEM(Digital Elevation Model) is in the geographic information system geography database the most important space information paper and depends on carries on the terrain analysis the core data system. At present world each main developed country all in abundance established has covered national the DEM data system. DEM already in the mapping, the resources and the environment, the disaster prevented and controlled, the national defense and so on in each application domain is playing the more and more huge role. However, each kind of DEM error existence varying degree reduced the analysis and the application result confidence level. The strengthening to based on the topographic diagram DEM precision inspection and the quality appraisal research, provides the science reasonable quality specification for each kind of GIS analysis product, has the extremely important theory significance and the application value.The DEM data in the operational control automation, the military terrain safeguard, the weapon precision guidance, the satellite positioning system, artillery aspect the and so on reconnaissance radar system, map revision and fast revision survey widespread application, causes to its precision inspection and the quality appraised the research appears importantly.The army correlation department has also developed the map digitization data and the DEM quality control topic research. Started from 1992 to establish 1: 50,000 ground elevations database, starts to conduct the...