Mapinfo数据的坐标转换方法研究

Research The Coordinate Tranaformation Method About Mapinfo Data

该文根据三种方式深入探讨了带属性的MapInfo数据的坐标转换方法:一种通过VC和MapX编程调入".tab"文件,实现WINDOWS窗口界面化的输入和显示方式,通过输入七参数或四参数,快速实现了坐标系之间的一系列转换;一种通过AutoCAD Map 3D软件导入和导出".tab"文件,利用平移、旋转、缩放命令实现四参数转换;一种在.prj文件中定义坐标系,通过改变投影来进行转换。这三种方式最终都以WGS-84坐标转换为BJ54坐标为例子进行了验证,取得良好结果。

This paper further researches the coordinate trausformation method of Maplnfo data with attributes according to the three ways. One way is importing＂.tab＂files based on VC＋＋ programmed platform and MapX,which can achieve input and display mode of WINDOWS interface,and achieve a series of transformation by imputing seven parameters or four parameters.The other way is importing and exporting＂.tab＂file through the AutoCAD Map 3D software,which can realize four parameters coordinate conversion useing the move,rotate and scale command.Another way is defining coordinate system in the.prj file and then changing the projection to transform.The three methods were eventually verified taking WGS -84 coordinates convert to B J54 coordinates for example,and has achieved good results.