Application Of Vector Map Coordinate Transformation

Abstract:This paper proposes a vector map coordinate transformation method based on10-parameter orthomorphic transformation integrated with AutoCAD DXF files, for the purpose of batch processing with large vector terrain data preciously. The research mainly includes modeling of coordinate transformation, landscape construction in elevation transformation and format and read-write methodology of DXF file, which are crucial steps for vector map transformation. Key methods, such as10-parameter orthomorphic transformation, evaluation point transformation, contour line rarefaction and generation, are applied in the research. Based on theoretical investigation and software engineering, high precious transformation software has been developed for topographic maps of Wangcheng, which resolves the transformation problems between coordinates of3D vector entity and the world in AutoCAD DXF files.