java版本坐标转换

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public class Gps {

private double wgLat;

private double wgLon;

public Gps(double wgLat, double wgLon) {

setWgLat(wgLat);

setWgLon(wgLon);

}

public double getWgLat() {

return wgLat;

}

public void setWgLat(double wgLat) {

this.wgLat = wgLat;

}

public double getWgLon() {

return wgLon;

}

public void setWgLon(double wgLon) {

this.wgLon = wgLon;

}

@Override

public String toString() {

return wgLat + "," + wgLon;

}

1 /**
  2  * 各地图API坐标系统比较与转换;
  3  * 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,
  4  * 谷歌地图采用的是WGS84地理坐标系（中国范围除外）;
  5  * 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。
  6  * 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;
  7  * 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。 chenhua
  8  */
  9 public class PositionUtil {
10
11     public static final String BAIDU_LBS_TYPE = "bd09ll";
12
13     public static double pi = 3.1415926535897932384626;
14     public static double a = 6378245.0;
15     public static double ee = 0.00669342162296594323;
16
17     /**
18      * 84 to 火星坐标系 (GCJ-02) World Geodetic System ==> Mars Geodetic System
19      *
20      * @param lat
21      * @param lon
22      * @return
23      */
24     public static Gps gps84_To_Gcj02(double lat, double lon) {
25         if (outOfChina(lat, lon)) {
26             return null;
27         }
28         double dLat = transformLat(lon - 105.0, lat - 35.0);
29         double dLon = transformLon(lon - 105.0, lat - 35.0);
30         double radLat = lat / 180.0 * pi;
31         double magic = Math.sin(radLat);
32         magic = 1 - ee * magic * magic;
33         double sqrtMagic = Math.sqrt(magic);
34         dLat = (dLat * 180.0) / ((a * (1 - ee)) / (magic * sqrtMagic) * pi);
35         dLon = (dLon * 180.0) / (a / sqrtMagic * Math.cos(radLat) * pi);
36         double mgLat = lat + dLat;
37         double mgLon = lon + dLon;
38         return new Gps(mgLat, mgLon);
39     }
40
41     /**
42      * * 火星坐标系 (GCJ-02) to 84 * * @param lon * @param lat * @return
43      * */
44     public static Gps gcj_To_Gps84(double lat, double lon) {
45         Gps gps = transform(lat, lon);
46         double lontitude = lon * 2 - gps.getWgLon();
47         double latitude = lat * 2 - gps.getWgLat();
48         return new Gps(latitude, lontitude);
49     }
50
51     /**
52      * 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
53      *
54      * @param gg_lat
55      * @param gg_lon
56      */
57     public static Gps gcj02_To_Bd09(double gg_lat, double gg_lon) {
58         double x = gg_lon, y = gg_lat;
59         double z = Math.sqrt(x * x + y * y) + 0.00002 * Math.sin(y * pi);
60         double theta = Math.atan2(y, x) + 0.000003 * Math.cos(x * pi);
61         double bd_lon = z * Math.cos(theta) + 0.0065;
62         double bd_lat = z * Math.sin(theta) + 0.006;
63         return new Gps(bd_lat, bd_lon);
64     }
65
66     /**
67      * * 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
68      * bd_lat * @param bd_lon * @return
69      */
70     public static Gps bd09_To_Gcj02(double bd_lat, double bd_lon) {
71         double x = bd_lon - 0.0065, y = bd_lat - 0.006;
72         double z = Math.sqrt(x * x + y * y) - 0.00002 * Math.sin(y * pi);
73         double theta = Math.atan2(y, x) - 0.000003 * Math.cos(x * pi);
74         double gg_lon = z * Math.cos(theta);
75         double gg_lat = z * Math.sin(theta);
76         return new Gps(gg_lat, gg_lon);
77     }
78
79     /**
80      * (BD-09)-->84
81      * @param bd_lat
82      * @param bd_lon
83      * @return
84      */
85     public static Gps bd09_To_Gps84(double bd_lat, double bd_lon) {
86
87         Gps gcj02 = PositionUtil.bd09_To_Gcj02(bd_lat, bd_lon);
88         Gps map84 = PositionUtil.gcj_To_Gps84(gcj02.getWgLat(),
89                 gcj02.getWgLon());
90         return map84;
91
92     }
93
94     public static boolean outOfChina(double lat, double lon) {
95         if (lon < 72.004 || lon > 137.8347)
96             return true;
97         if (lat < 0.8293 || lat > 55.8271)
98             return true;
99         return false;
100     }
101
102     public static Gps transform(double lat, double lon) {
103         if (outOfChina(lat, lon)) {
104             return new Gps(lat, lon);
105         }
106         double dLat = transformLat(lon - 105.0, lat - 35.0);
107         double dLon = transformLon(lon - 105.0, lat - 35.0);
108         double radLat = lat / 180.0 * pi;
109         double magic = Math.sin(radLat);
110         magic = 1 - ee * magic * magic;
111         double sqrtMagic = Math.sqrt(magic);
112         dLat = (dLat * 180.0) / ((a * (1 - ee)) / (magic * sqrtMagic) * pi);
113         dLon = (dLon * 180.0) / (a / sqrtMagic * Math.cos(radLat) * pi);
114         double mgLat = lat + dLat;
115         double mgLon = lon + dLon;
116         return new Gps(mgLat, mgLon);
117     }
118
119     public static double transformLat(double x, double y) {
120         double ret = -100.0 + 2.0 * x + 3.0 * y + 0.2 * y * y + 0.1 * x * y
121                 + 0.2 * Math.sqrt(Math.abs(x));
122         ret += (20.0 * Math.sin(6.0 * x * pi) + 20.0 * Math.sin(2.0 * x * pi)) * 2.0 / 3.0;
123         ret += (20.0 * Math.sin(y * pi) + 40.0 * Math.sin(y / 3.0 * pi)) * 2.0 / 3.0;
124         ret += (160.0 * Math.sin(y / 12.0 * pi) + 320 * Math.sin(y * pi / 30.0)) * 2.0 / 3.0;
125         return ret;
126     }
127
128     public static double transformLon(double x, double y) {
129         double ret = 300.0 + x + 2.0 * y + 0.1 * x * x + 0.1 * x * y + 0.1
130                 * Math.sqrt(Math.abs(x));
131         ret += (20.0 * Math.sin(6.0 * x * pi) + 20.0 * Math.sin(2.0 * x * pi)) * 2.0 / 3.0;
132         ret += (20.0 * Math.sin(x * pi) + 40.0 * Math.sin(x / 3.0 * pi)) * 2.0 / 3.0;
133         ret += (150.0 * Math.sin(x / 12.0 * pi) + 300.0 * Math.sin(x / 30.0
134                 * pi)) * 2.0 / 3.0;
135         return ret;
136     }
137
138     public static void main(String[] args) {
139
140         // 北斗芯片获取的经纬度为WGS84地理坐标 31.426896,119.496145
141         Gps gps = new Gps(31.426896, 119.496145);
142         System.out.println("gps :" + gps);
143         Gps gcj = gps84_To_Gcj02(gps.getWgLat(), gps.getWgLon());
144         System.out.println("gcj :" + gcj);
145         Gps star = gcj_To_Gps84(gcj.getWgLat(), gcj.getWgLon());
146         System.out.println("star:" + star);
147         Gps bd = gcj02_To_Bd09(gcj.getWgLat(), gcj.getWgLon());
148         System.out.println("bd  :" + bd);
149         Gps gcj2 = bd09_To_Gcj02(bd.getWgLat(), bd.getWgLon());
150         System.out.println("gcj :" + gcj2);
151     }

152 }

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