Research And Realization For Some Issues On GIS-Oriented Topographical Mapping System

At present,the theory and application of topographical mapping system is quite mature. More of them reached the criterion of topographical map and the requirement of map digitizing. However,the deeper application and conversion of digital map to GIS are ignored. Topographical maps are the principal frame form of GIS,and realization map digitizing and offering GIS basic spatial data is one of the important research fields in surveying and GIS,which is also necessity of development of science and technology. Based on building GIS-Oriented topographical mapping system theories,this themes apply the advanced ObjectARX technology,aim at topographical mapping and exporting to GIS,and resolve several key problems,such as symbols analysis and building,DTM and contour line automatic drawing,topographical map adjoining,digital image rectifying etc. And it offers models and arithmetic,realizing the general functions of GIS-Oriented topographical mapping system.