Java转换坐标系，GPS（WGS84）大地200（CGCS200）、百度（BD-09）、高德（GCJ-02）互转，一文搞懂坐标系、坐标转换

1.分不清的坐标系
WG-S84: 地理坐标系统，GPS仪器记录的经纬度信息，Google Earth采用，Google Map中国范围外使用，高德地图中国范围外使用。 GCJ-02: 投影坐标系统，火星坐标系，中国国家测绘局制定的坐标系统，由WGS-84加密后的坐标。Google中国和搜搜地图，arcgis地图，高德地图 BD-09: 投影坐标系统，百度坐标，GCJ-02加密后的坐标系，只适用于百度地图

（在国内是不允许直接用WGS84坐标系标注的，必须经过加密后才能用。必须至少使用GCJ－02坐标系，或者使用在GCJ－02加密后再进行加密的坐标系，如百度坐标系）

其他：搜狗地图：搜狗坐标系，图吧：图吧坐标等，估计也是在GCJ02基础上加密而成的，这里暂不涉及

2.直接上代码

package ft.util.gps;// 导入Proj4J库import org.locationtech.proj4j.*;import org.locationtech.proj4j.io.Proj4FileReader;import java.io.IOException;public class CoordinateTransformUtil {    static double x_pi = 3.14159265358979324 * 3000.0 / 180.0;    // π    static double pi = 3.1415926535897932384626;    // 长半轴    static double a = 6378245.0;    // 扁率    static double ee = 0.00669342162296594323;        public static PointXY bd09towgs84(double lng, double lat) {        PointXY gcj = bd09togcj02(lng, lat);        PointXY wgs84 = gcj02towgs84(gcj.getLon(), gcj.getLat());        return wgs84;    }        public static PointXY wgs84tobd09(double lng, double lat) {        PointXY gcj = wgs84togcj02(lng, lat);        PointXY bd09 = gcj02tobd09(gcj.getLon(), gcj.getLat());        return bd09;    }        public static PointXY gcj02tobd09(double lng, double lat) {        double z = Math.sqrt(lng * lng + lat * lat) + 0.00002 * Math.sin(lat * x_pi);        double theta = Math.atan2(lat, lng) + 0.000003 * Math.cos(lng * x_pi);        double bd_lng = z * Math.cos(theta) + 0.0065;        double bd_lat = z * Math.sin(theta) + 0.006;        return new PointXY(bd_lng, bd_lat);    }        public static PointXY bd09togcj02(double bd_lon, double bd_lat) {        double x = bd_lon - 0.0065;        double y = bd_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_lng = z * Math.cos(theta);        double gg_lat = z * Math.sin(theta);        return new PointXY(gg_lng, gg_lat);    }        public static PointXY wgs84togcj02(double lng, double lat) {        if (out_of_china(lng, lat)) {            return new PointXY(lng, lat);        }        double dlat = transformlat(lng - 105.0, lat - 35.0);        double dlng = transformlng(lng - 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);        dlng = (dlng * 180.0) / (a / sqrtmagic * Math.cos(radlat) * pi);        double mglat = lat + dlat;        double mglng = lng + dlng;        return new PointXY(mglng, mglat);    }        public static PointXY gcj02towgs84(double lng, double lat) {        if (out_of_china(lng, lat)) {            return new PointXY(lng, lat);        }        double dlat = transformlat(lng - 105.0, lat - 35.0);        double dlng = transformlng(lng - 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);        dlng = (dlng * 180.0) / (a / sqrtmagic * Math.cos(radlat) * pi);        double mglat = lat + dlat;        double mglng = lng + dlng;        return new PointXY(lng * 2 - mglng, lat * 2 - mglat);    }        public static double transformlat(double lng, double lat) {        double ret = -100.0 + 2.0 * lng + 3.0 * lat + 0.2 * lat * lat + 0.1 * lng * lat + 0.2 * Math.sqrt(Math.abs(lng));        ret += (20.0 * Math.sin(6.0 * lng * pi) + 20.0 * Math.sin(2.0 * lng * pi)) * 2.0 / 3.0;        ret += (20.0 * Math.sin(lat * pi) + 40.0 * Math.sin(lat / 3.0 * pi)) * 2.0 / 3.0;        ret += (160.0 * Math.sin(lat / 12.0 * pi) + 320 * Math.sin(lat * pi / 30.0)) * 2.0 / 3.0;        return ret;    }        public static double transformlng(double lng, double lat) {        double ret = 300.0 + lng + 2.0 * lat + 0.1 * lng * lng + 0.1 * lng * lat + 0.1 * Math.sqrt(Math.abs(lng));        ret += (20.0 * Math.sin(6.0 * lng * pi) + 20.0 * Math.sin(2.0 * lng * pi)) * 2.0 / 3.0;        ret += (20.0 * Math.sin(lng * pi) + 40.0 * Math.sin(lng / 3.0 * pi)) * 2.0 / 3.0;        ret += (150.0 * Math.sin(lng / 12.0 * pi) + 300.0 * Math.sin(lng / 30.0 * pi)) * 2.0 / 3.0;        return ret;    }        public static boolean out_of_china(double lng, double lat) {        if (lng < 72.004 || lng > 137.8347) {            return true;        } else if (lat < 0.8293 || lat > 55.8271) {            return true;        }        return false;    }       public static PointXY wgs2cgcg(double lon, double lat) {        Proj4FileReader proj4FileReader = new Proj4FileReader();        String[] paramStr = new String[0];        try {            paramStr = proj4FileReader.readParametersFromFile("epsg","4528");        } catch (IOException e) {            e.printStackTrace();        }        CRSFactory targetFactory = new CRSFactory();        //目标坐标系统        CoordinateReferenceSystem cgcs = targetFactory.createFromParameters("4528", paramStr);        //源坐标系统        CRSFactory crsFactory = new CRSFactory();        String wgs84_param = "+title=long/lat:WGS84 +proj=longlat +ellps=WGS84 +datum=WGS84 +units=degress";        CoordinateReferenceSystem wgs84 = crsFactory.createFromParameters("WGS84", wgs84_param);        CoordinateTransformFactory ctf = new CoordinateTransformFactory();        CoordinateTransform transform = ctf.createTransform(wgs84, cgcs);        ProjCoordinate projCoordinate = new ProjCoordinate(lon,lat);        transform.transform(projCoordinate,projCoordinate);        return new PointXY(projCoordinate.x,projCoordinate.y);    }    public static PointXY cgcg2wgs(double lon, double lat) {        Proj4FileReader proj4FileReader = new Proj4FileReader();        String[] paramStr = new String[0];        try {            paramStr = proj4FileReader.readParametersFromFile("epsg","4528");        } catch (IOException e) {            e.printStackTrace();        }        CRSFactory targetFactory = new CRSFactory();        //目标坐标系统        CoordinateReferenceSystem cgcs = targetFactory.createFromParameters("4528", paramStr);        //源坐标系统        CRSFactory crsFactory = new CRSFactory();        String wgs84_param = "+title=long/lat:WGS84 +proj=longlat +ellps=WGS84 +datum=WGS84 +units=degress";        CoordinateReferenceSystem wgs84 = crsFactory.createFromParameters("WGS84", wgs84_param);        CoordinateTransformFactory ctf = new CoordinateTransformFactory();        CoordinateTransform transform = ctf.createTransform(cgcs,wgs84);        ProjCoordinate projCoordinate = new ProjCoordinate(lon,lat);        transform.transform(projCoordinate,projCoordinate);        return new PointXY(projCoordinate.x,projCoordinate.y);    }    public static void main(String[] args) {        // 坐标转化api        // https://tool.lu/coordinate/?ivk_sa=1024320u        //        System.out.println(wgs84togcj02(118.840344,31.99335));   // ok        System.out.println(gcj02towgs84(107.80473041151717, 29.33190938671697));  // ok        System.out.println(gcj02tobd09(107.80473041151717, 29.33190938671697));   // ok        System.out.println(wgs84tobd09(107.8003647, 29.3347596));    // ok        System.out.println(bd09togcj02(107.81129990277971, 29.337686168994296));        System.out.println(bd09towgs84(107.81129990277971, 29.337686168994296));        System.out.println(wgs2cgcg(118.70331743312532,32.103750473727125));//        System.out.println(bd09towgs84(120.24794,29.72979));//gcj02towgs84//        System.out.println(gcj02tobd09(120.236701, 29.726141));//        PointXY p = wgs2cgcg(118.70331743312532,32.103750473727125);        System.out.println(p);        System.out.println(cgcg2wgs(p.getLon(), p.getLat()));    }}`在这里插入代码片`

测试结果
lon:118.84543348019479,lat:31.99121178083339
lon:107.80037405167121,lat:29.334768526991336
lon:107.81129968211874,lat:29.337686107444082
lon:107.81129968211874,lat:29.337686107444082
lon:107.80473019794286,lat:29.33191023473475
lon:107.80037383758244,lat:29.33476937412017
lon:4.0377605981347054E7,lat:3554093.2140468676
lon:4.0377605981347054E7,lat:3554093.2140468676
lon:118.70331743312477,lat:32.10375047372694

来源地址：https://blog.csdn.net/u011024436/article/details/133745789