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private const double x_pi = 3.14159265358979324 * 3000.0 / 180.0;/// <summary>/// 中国正常坐标系GCJ02协议的坐标，转到 百度地图对应的 BD09 协议坐标/// </summary>/// <param name="lat">维度</param>/// <param name="lng">经度</param>public static void Convert_GCJ02_To_BD09(ref double lat,ref double lng){double x = lng, y = lat;double z =Math.Sqrt(x * x + y * y) + 0.00002 * Math.Sin(y * x_pi);double theta = Math.Atan2(y, x) + 0.000003 * Math.Cos(x * x_pi);lng = z * Math.Cos(theta) + 0.0065;lat = z * Math.Sin(theta) + 0.006;}/// <summary>/// 百度地图对应的 BD09 协议坐标，转到 中国正常坐标系GCJ02协议的坐标/// </summary>/// <param name="lat">维度</param>/// <param name="lng">经度</param>public static void Convert_BD09_To_GCJ02(ref double lat, ref double lng){double x = lng - 0.0065, y = lat - 0.006;double z = Math.Sqrt(x * x + y * y) - 0.00002 * Math.Sin(y * x_pi);double theta = Math.Atan2(y, x) - 0.000003 * Math.Cos(x * x_pi);lng = z * Math.Cos(theta);lat = z * Math.Sin(theta);} |
百度经纬度和google经纬度互转,布布扣,bubuko.com
原文：http://www.cnblogs.com/kobe8/p/3716096.html