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coordinate-descent

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坐标转换,包括 * 各地图API坐标系统比较与转换; * WGS84坐标系:即地球坐标系,国际上通用的坐标系。设备一般包含GPS芯片或者北斗芯片获取的经纬度为WGS84地理坐标系, * 谷歌地图采用的是WGS84地理坐标系(中国范围除外); * GCJ02坐标系:即火星坐标系,是由中国国家测绘局制订的地理信息系统的坐标系统。由WGS84坐标系经加密后的坐标系。 * 谷歌中国地图和搜搜中国地图采用的是GCJ02地理坐标系; BD09坐标系:即百度坐标系,GCJ02坐标系经加密后的坐标系; * 搜狗坐标系、图吧坐标系等,估计也是在GCJ02基础上加密而成的。

  • Updated Mar 13, 2018
  • Objective-C

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