JAVA火星坐标系、百度坐标系、84坐标系相互转换工具类
/** * 坐标系转换工具类 */ public class PositionUtil { public static double pi = 3.1415926535897932384626; public static double x_pi = 3.14159265358979324 * 3000.0 / 180.0; public static double a = 6378245.0; public static double ee = 0.00669342162296594323; public 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 * Math.sqrt(Math.abs(x)); ret += (20.0 * Math.sin(6.0 * x * pi) + 20.0 * Math.sin(2.0 * x * pi)) * 2.0 / 3.0; ret += (20.0 * Math.sin(y * pi) + 40.0 * Math.sin(y / 3.0 * pi)) * 2.0 / 3.0; ret += (160.0 * Math.sin(y / 12.0 * pi) + 320 * Math.sin(y * pi / 30.0)) * 2.0 / 3.0; return ret; } public 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 * Math.sqrt(Math.abs(x)); ret += (20.0 * Math.sin(6.0 * x * pi) + 20.0 * Math.sin(2.0 * x * pi)) * 2.0 / 3.0; ret += (20.0 * Math.sin(x * pi) + 40.0 * Math.sin(x / 3.0 * pi)) * 2.0 / 3.0; ret += (150.0 * Math.sin(x / 12.0 * pi) + 300.0 * Math.sin(x / 30.0 * pi)) * 2.0 / 3.0; return ret; } public static double[] transform(double lat, double lon) { if (outOfChina(lat, lon)) { return new double[]{lat, 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}; } public static boolean 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; } /** * WGS-84 转 火星坐标系 * * @param lat * @param lon * @return */ public static double[] gps84_To_Gcj02(double lat, double lon) { if (outOfChina(lat, lon)) { return new double[]{lat, 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}; } /** * 火星坐标系 (GCJ-02) 转 WGS-84 * * @param lat * @param lon * @return */ public static double[] gcj02_To_Gps84(double lat, double lon) { double[] gps = transform(lat, lon); double lontitude = lon * 2 - gps[1]; double latitude = lat * 2 - gps[0]; return new double[]{latitude, lontitude}; } /** * 火星坐标系 (GCJ-02) 转百度坐标系 (BD-09) * * @param lat * @param lon * @return */ public static double[] gcj02_To_Bd09(double lat, double lon) { double x = lon, 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); double tempLon = z * Math.cos(theta) + 0.0065; double tempLat = z * Math.sin(theta) + 0.006; double[] gps = {tempLat, tempLon}; return gps; } /** * 百度坐标系 (BD-09) 转 火星坐标系 (GCJ-02) * * @param lat * @param lon * @return */ public static double[] bd09_To_Gcj02(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 tempLon = z * Math.cos(theta); double tempLat = z * Math.sin(theta); double[] gps = {tempLat, tempLon}; return gps; } /** * 将gps84转为bd09 * * @param lat * @param lon * @return */ public static double[] gps84_To_bd09(double lat, double lon) { double[] gcj02 = gps84_To_Gcj02(lat, lon); double[] bd09 = gcj02_To_Bd09(gcj02[0], gcj02[1]); return bd09; } /** * bd09 转 84 * * @param lat * @param lon * @return */ public static double[] bd09_To_gps84(double lat, double lon) { double[] gcj02 = bd09_To_Gcj02(lat, lon); double[] gps84 = gcj02_To_Gps84(gcj02[0], gcj02[1]); //保留小数点后六位 gps84[0] = retain6(gps84[0]); gps84[1] = retain6(gps84[1]); return gps84; } /** * 保留小数点后六位 * * @param num * @return */ private static double retain6(double num) { String result = String.format("%.6f", num); return Double.valueOf(result); } /** * 经纬度转化为坐标,单位是公里 * 米勒圆柱投影 介绍 :http://resources.arcgis.com/zh-cn/help/main/10.1/index.html#//003r00000039000000 * * @param lon * @param lat * @return */ public static double[] millerXY(double lon, double lat) { //地球周长 double L = 6381372 * Math.PI * 2; // 平面展开后,x轴等于周长 double W = L; // y轴约等于周长一半 double H = L / 2; // 米勒投影中的一个常数,范围大约在正负2.3之间 double mill = 2.3; // 将经度从度数转换为弧度 double x = lon * Math.PI / 180; // 将纬度从度数转换为弧度 double y = lat * Math.PI / 180; // 米勒投影的转换 y = 1.25 * Math.log(Math.tan(0.25 * Math.PI + 0.4 * y)); // 弧度转为实际距离 x = (W / 2) + (W / (2 * Math.PI)) * x; y = (H / 2) - (H / (2 * mill)) * y; double[] result = new double[2]; result[0] = x; result[1] = y; return result; } }
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(蓝奏云官网有些地址失效了,需要把请求地址lanzous改成lanzoux才可以)