在MapInfo中自定义坐标系

Define Coordinate System in MapInfo

Maplnfo地图坐标系是以WGS 84坐标系为基础,通过指定转换到WGS 84基准面的参数定义其它坐标系的基准面,由于不同的椭球体之间转换基准面是不严密的,因此对于多数用户都需要通过在MapInfow.prj文件中自定义基准面来定义准确的坐标系.文中分别阐述了我国使用的坐标系统、MapInfo坐标系中预定义的中国大陆坐标系、自定义坐标系参数以及自定义坐标系.

Based on WGS 84 coordinate system, MapInfo map coordinate system is used to define datum of other coordinate system by specifying the parameters converted to WGS 84 datum. Due to conversion between different ellipsoid datum is imprecise, therefore most users need to define exact coordinate sys- tem by define a custom datum through edit the MapInfow. prj file. This article expounded the coordinate system, MapInfo coordinate system predefined China's Mainland coordinate system, custom coordinate system parameters and customization coordinate system used in China.