【GPSUtil 工具类地图坐标系转换】

package com.wsmtec.common.utils;/*** 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。* 
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* WGS-84 地心坐标系，即GPS原始坐标体系* GCJ-02火星坐标系，国测局02年发布的坐标体系，它是一种对经纬度数据的加密算法，即加入随机的偏差。高德、腾讯、Google中国地图使用。国内最广泛使用的坐标体系；* 一般都是由GCJ-02进过偏移算法得到的。这种体系就根据每个公司的不同，坐标体系都不一样了。* 比如，百度的BD-09坐标、搜狗坐标等*/
public class GPSUtil {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;private static double EARTH_RADIUS = 6378.137;private static double rad(double d) {return d * Math.PI / 180.0;}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 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;}/*** 84 to 火星坐标系 (GCJ-02) World Geodetic System ==> Mars Geodetic System** @param lat 纬度* @param lon 经度* @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) to 84 * * @param lon * @param lat * @return*/public static double[] gcj02_To_Gps84(double lat, double lon) {double[] gps = gps84_To_Gcj02(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) 与百度坐标系 (BD-09) 的转换算法 将 GCJ-02 坐标转换成 BD-09 坐标** @param lat* @param lon*/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;}/*** * 火星坐标系 (GCJ-02) 与百度坐标系 (BD-09) 的转换算法 * * 将 BD-09 坐标转换成GCJ-02 坐标 * * @param* bd_lat * @param bd_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;}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);}/*** @Title: getDistance* @Description: 通过经纬度获取距离(单位：米)* @param  lng1--纬度1* @param  lat1--经度1* @param  lng2--纬度2* @param  lat2--经度2* @return double返回类型距离* @Author: LH* @Date: 2018年12月25日 下午3:15:21*/public static double getDistance(double lng1, double lat1, double lng2, double lat2) {double radLat1 = rad(lat1);double radLat2 = rad(lat2);double a = radLat1 - radLat2;double b = rad(lng1) - rad(lng2);double s = 2 * Math.asin(Math.sqrt(Math.pow(Math.sin(a / 2), 2) + Math.cos(radLat1) * Math.cos(radLat2) * Math.pow(Math.sin(b / 2), 2)));s = s * EARTH_RADIUS;s = Math.round(s * 10000d) / 10000d;s = s * 1000;return s;}/*** 根据高德数据的经纬度计算距离* @param latitude1* @param longitude1* @param latitude2* @param longitude2* @return 距离* @Auther xiaocai*/public static float distanceByAmap(Double latitude1, Double longitude1, Double latitude2, Double longitude2) {double earthRadius = 6367000;double lat1 = (latitude1 * Math.PI) / 180;double lng1 = (longitude1 * Math.PI) / 180;double lat2 = (latitude2 * Math.PI) / 180;double lng2 = (longitude2 * Math.PI) / 180;double calcLongitude = lng2 - lng1;double calcLatitude = lat1 - lat2;double stepOne = Math.pow(Math.sin(calcLatitude / 2), 2) + Math.cos(lat1) * Math.cos(lat2) * Math.pow(Math.sin(calcLongitude / 2), 2);double stepTwo = 2 * Math.asin(Math.min(1, Math.sqrt(stepOne)));double calculatedDistance = earthRadius * stepTwo;return (float)calculatedDistance;}}

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