GIS中的坐标系定义是GIS系统的基础，正确定义GIS系统的坐标系非常重要。在MapInfo地图投影中缺少针对中国很多地区大比例尺

和中比例尺的投影方式，通过对MapInfo中Mapinfow.prj文件的研究，以吐鲁番地区为例，添加了高斯-克吕格（Gauss-Krüger）投影，能解决一些大比例尺对变形小的要求。-GIS in the coordinate system is defined as the basis of GIS systems, GIS systems correctly defined the coordinate system is very important. In the MapInfo map projection for China in many areas the lack of large-scale and medium scale projection method, through MapInfo files in Mapinfow.prj studies to Turpan area as an example, adding a Gauss- Kruger (Gauss-Krüger) Projection can solve some large-scale deformation