该研究开拓了常用地图投影的功能和应用范围，获得了系统的理论结果和应用实例。
This method opens up new function and application range for common map projections. Systematical results and applications have been obtained.
地图投影变换是地图制图理论的基础，也是GIS的重要组成部分。
The transformation of map projection is the base for mapping theory and an important component of GIS.
该研究开拓了常用地图投影的功能和应用范围，获得了系统的理论结果和应用实例。
A new kind of variable scale projection is obtained. This method opens up new function and application range for common map projections. Systematical results and applications have been obtained.
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