基于ObjectARX的图形坐标转换方法研究  

The Research on Graphics Coordinate Transformation Based on ObjectARX

作　　者：陆建华[1] 张蒙[1] 

机构地区：[1]苏州市测绘院有限责任公司,江苏苏州215000

出　　处：《现代测绘》2015年第3期23-26,共4页Modern Surveying and Mapping

摘　　要：测绘行业电子地图多以CAD的DWG或DXF格式存储和使用,在不同时期因经济发展和习惯改变等因素会采用不同坐标系统,使用前需进行坐标转换,这导致了使用过程中的很大限制。现存商业软件很少能对CAD图形文件进行直接坐标转换。结合C++及ObjectARX研究在CAD环境下对图元的坐标系转换,通过实际生产验证了该方法可以在提高工作效率的同时保证图元转化精度和成果质量。It is common to utilize DWG or DXF format of CAD for storage or using in surveying industry electronic map,and different coordinate systems will be used at different times due to the economic development and habits change.The coordinate value of the same point in electronic map varies with the change of the coordinate system,and it needs coordinate conversion before its use which is greatly limited its use.Existing commercial software rarely can transform coordinate directly for CAD drawing files.It mainly research on coordinate transformation of graphics in CAD environment based on C ＋ ＋ and ObjectARX,and proved that the method proposed by which will not only improve the work efficiency but also ensure the accuracy of conversion and the quality of results.

关 键 词：OBJECTARX AutoCAD图元 仿射变换 高斯正反算 坐标转换 

分 类 号：P231.5[天文地球—摄影测量与遥感]