Implementation of GIS system for damage evaluation of farmland productivity in mining area with high phreatic water level

GIS technology has become an important and convenient tools for evaluation of coal mining damage.In view of the damage characteristics of farmland due to mining subsidence within mining area with high phreatic water level in the eastern part of China,the general design of the system function,the establishment of database and technology of implementation are analyzed emphatically from the point of view of construction of the system.Based on the AO component libraries of Arcgis and with the aid of ActiveX technology and 3D visualization technique,the integrated evaluation system of damage evaluation for farmland productivity,2D and 3D visualization,compensate calculation in mining subsidence area is constructed.The system is applied in damage evaluation for typical mining subsidence of Baodian Coal Mine.The evaluation results mainly accord with the actual situation and shows that the system is scientific and effective.