java版本坐标转换


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 }