13. (map data) conversion between Baidu coordinate (bd09), national survey of China coordinate (Mars coordinate, gcj02), and WGS84 coordinate system

General catalogue of map house （ Please check this blog before subscribing ）

Map house ：cesium+leaflet+echart+ Map data + Introduction to map tools and other related contents

Be careful ：
There must be errors in the coordinate transformation of different coordinate systems , Only try to reduce the error as much as possible .
At different longitudes and latitudes , The degree of error is also different

Here's the complete code , Important parts of the code will be explained accordingly

/** * Created by Wandergis on 2015/7/8. *  Provides Baidu coordinates （BD09）、 Coordinates of National Survey Bureau （ Mars coordinates ,GCJ02）、 and WGS84 Transformation between coordinate systems  */
//UMD Magic code 
// if the module has no dependencies, t