經緯度標準

????????WGS-84：是國際標準，GPS坐標（Google Earth使用、或者GPS模塊）
????????GCJ-02：中國坐標偏移標準，Google Map、高德、騰訊使用
????????BD-09：百度坐標偏移標準，Baidu Map使用

????????目前支持國內
????????國外坐標可能需要修改

static double pi = 3.14159265358979324; static double a = 6378245.0; static double ee = 0.00669342162296594323; public final static double x_pi = pi * 3000.0 / 180.0;/*** 高德經緯度轉百度經緯度*/ public static double[] gcj2bd(double lat, double lon) {double z = Math.sqrt(lon * lon + lat * lat) + 0.00002 * Math.sin(lat * x_pi);double theta = Math.atan2(lat, lon) + 0.000003 * Math.cos(lon * x_pi);double bd_lon = z * Math.cos(theta) + 0.0065;double bd_lat = z * Math.sin(theta) + 0.006;return new double[] { bd_lat, bd_lon }; }/*** 百度經緯度轉高德*/ public static double[] bd2gcj(double lat, double lon) {double x = lon - 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);double gg_lon = z * Math.cos(theta);double gg_lat = z * Math.sin(theta);return new double[] { gg_lat, gg_lon }; }/*** 國標經緯度轉高德經緯度*/ public static double[] wgs2gcj(double lat, double lon) {double dLat = transformLat(lon - 105.0, lat - 35.0);double dLon = transformLon(lon - 105.0, lat - 35.0);double radLat = lat / 180.0 * pi;double magic = Math.sin(radLat);magic = 1 - ee * magic * magic;double sqrtMagic = Math.sqrt(magic);dLat = (dLat * 180.0) / ((a * (1 - ee)) / (magic * sqrtMagic) * pi);dLon = (dLon * 180.0) / (a / sqrtMagic * Math.cos(radLat) * pi);double mgLat = lat + dLat;double mgLon = lon + dLon;return new double[]{ mgLat, mgLon }; }/*** 高德轉到GPS*/ public static double[] gcj2wgc(double lat, double lon) {double dLat = transformLat(lon - 105.0, lat - 35.0);double dLon = transformLon(lon - 105.0, lat - 35.0);double radLat = lat / 180.0 * pi;double magic = Math.sin(radLat);magic = 1 - ee * magic * magic;double sqrtMagic = Math.sqrt(magic);dLat = (dLat * 180.0) / ((a * (1 - ee)) / (magic * sqrtMagic) * pi);dLon = (dLon * 180.0) / (a / sqrtMagic * Math.cos(radLat) * pi);double mgLat = lat + dLat;double mgLon = lon + dLon;double lontitude = lon * 2 - mgLon;double latitude = lat * 2 - mgLat;return new double[]{latitude, lontitude}; }/*** 國標轉百度*/ public static double[] wgs2bd(double lat, double lon) {double[] wgs2gcj = wgs2gcj(lat, lon);return gcj2bd(wgs2gcj[0], wgs2gcj[1]); }/*** 經緯度轉換*/ private static double transformLat(double lat, double lon) {double ret = -100.0 + 2.0 * lat + 3.0 * lon + 0.2 * lon * lon + 0.1 * lat * lon + 0.2 * Math.sqrt(Math.abs(lat));ret = getRet(lat, lon, ret);ret += (160.0 * Math.sin(lon / 12.0 * pi) + 320 * Math.sin(lon * pi / 30.0)) * 2.0 / 3.0;return ret; }private static double getRet(double lat, double lon, double ret) {ret += (20.0 * Math.sin(6.0 * lat * pi) + 20.0 * Math.sin(2.0 * lat * pi)) * 2.0 / 3.0;ret += (20.0 * Math.sin(lon * pi) + 40.0 * Math.sin(lon / 3.0 * pi)) * 2.0 / 3.0;return ret; }private static double transformLon(double lat, double lon) {double ret = 300.0 + lat + 2.0 * lon + 0.1 * lat * lat + 0.1 * lat * lon + 0.1 * Math.sqrt(Math.abs(lat));ret = getRet(lat, lat, ret);ret += (150.0 * Math.sin(lat / 12.0 * pi) + 300.0 * Math.sin(lat / 30.0 * pi)) * 2.0 / 3.0;return ret; } ?

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