基于ObjectARX的CGCS2000坐标转换程序实现

Implementation of CGCS2000 Coordinate Conversion Program Based on ObjectARX

我国目前全面启用CGCS2000国家大地坐标系,现存DWG数据大多都不是CGCS2000国家大地坐标系。基于将现存基础地理信息坐标系转换为CGCS2000国家大地坐标系的目的,采用ObjectARX结合Proj4开源地图投影库的方法,研究基于CAD二次开发的CGCS2000国家大地坐标系与历史坐标系的转换方法,通过实际坐标转换工程应用,证明该方法既提高了转换效率又保证了数据的坐标转换精度和质量。

China currently fully uses the CGCS2000 national geodetic coordinate system,and most of the existing DWG data is not the CGCS2000 national geodetic coordinate system.Based on the purpose of converting the existing basic geographic information coordinate system into the CGCS2000 national geodetic coordinate system,the method of using ObjectARX combined with the Proj4 open source map projection library to study the conversion method of the CGCS2000 national geodetic coordinate system and the historical coordinate system based on CAD secondary development,through the application of actual coordinate conversion engineering,it is proved that this method not only improves the conversion efficiency but also ensures the coordinate conversion accuracy and quality of the data,and has certain reference significance for the coordinate conversion work.