坐标系统与地图投影-coordinate systems and map projection

gis一个功能强大的坐标转换系统，可以在三种坐标系下进行四种坐标的转换，可以对学习GIS地图投影的同学有很大帮助-gis a powerful coordinate transformation system can be carried out under three kinds of coordinate system conversion of four coordinates, you can learn GIS map projection of the students are ve

基于webgis的地图投影定义，实现不同空间投影方法的转换-Based on the definition of webgis map projection, and to switch between different spatial projection methods