/** * * WGS-84 坐标系，是GPS系统所采用的坐标系。一切正常工作的GPS或GPS芯片所返回的坐标值都是这个坐标系下的数值。Google地图采用的卫星图也是按照这坐标系摆 * 放的。 * ****************************************************************************************************************************** * * GCJ-02 坐标系，是我天朝政府搞出来的加密坐标系，也常常被称为 “火星坐标系”。包括（但可能不限于）高德地图在内的国内地图服务商采用它来绘制地图。Apple、 * Google 等国外公司在其道路地图中使用的也是高德的数据。BD-09 坐标系则是百度地图专用的坐标系。 * */
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