Technology of classification and code of coal mine geology and survey information based on GIS

At first synthesized professional branch and graphical symbols of coal mine geology and survey,mainly including point,line,region and so on,and then classified and coded the geology and survey information entity by different professional layers and formed a classification and code system based on GIS.The system follows with the related mine foundation information standard of nation, considers both digital plotting and spatial analysis of GIS principle and combines with the object-oriented program design consideration.