Mark下吧，这是好东西啊。 /coolypf/article/details/8686588整理成C++代码：#includeconst double pi = 3.14159265358979324;//// Krasovsky 1940//// a = 6378245.0, 1/f = 298.3// b = a * (1 - f)// ee = (a^2 - b^2) / a^2;const double a = 6378245.0;const double ee = 0.00669342162296594323;static bool outOfChina(double lat, double lon){if (lon < 72.004 || lon > 137.8347)return true;if (lat < 0.8293 || lat > 55.8271)return true;return false;}static double transformLat(double x, double y){double ret = -100.0 + 2.0 * x + 3.0 * y + 0.2 * y * y + 0.1 * x * y + 0.2 * sqrt(abs(x));ret += (20.0 * sin(6.0 * x * pi) + 20.0 * sin(2.0 * x * pi)) * 2.0 / 3.0;ret += (20.0 * sin(y * pi) + 40.0 * sin(y / 3.0 * pi)) * 2.0 / 3.0;ret += (160.0 * sin(y / 12.0 * pi) + 320 * sin(y * pi / 30.0)) * 2.0 / 3.0;return ret;}static double transformLon(double x, double y){double ret = 300.0 + x + 2.0 * y + 0.1 * x * x + 0.1 * x * y + 0.1 * sqrt(abs(x));ret += (20.0 * sin(6.0 * x * pi) + 20.0 * sin(2.0 * x * pi)) * 2.0 / 3.0;ret += (20.0 * sin(x * pi) + 40.0 * sin(x / 3.0 * pi)) * 2.0 / 3.0;ret += (150.0 * sin(x / 12.0 * pi) + 300.0 * sin(x / 30.0 * pi)) * 2.0 / 3.0;return ret;}void gps_transform( double wgLat, double wgLon, double& mgLat, double& mgLon){if (outOfChina(wgLat, wgLon)){mgLat = wgLat;mgLon = wgLon;return;}double dLat = transformLat(wgLon - 105.0, wgLat - 35.0);double dLon = transformLon(wgLon - 105.0, wgLat - 35.0);double radLat = wgLat / 180.0 * pi;double magic = sin(radLat);magic = 1 - ee * magic * magic;double sqrtMagic = sqrt(magic);dLat = (dLat * 180.0) / ((a * (1 - ee)) / (magic * sqrtMagic) * pi);dLon = (dLon * 180.0) / (a / sqrtMagic * cos(radLat) * pi);mgLat = wgLat + dLat;mgLon = wgLon + dLon;};
