1、以下代码,提供的转换算法如下:
1)WGS-84 ——> GCJ02
2)GCJ02 ——> WGS-84
3)GCJ02 ——> BD09
4)BD09 ——> GCJ02
5)BD09 ——> WGS-84
1. package com.xy;
2.
3. /**
4. * 各地图API坐标系统比较与转换;
5. * 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,
6. * 谷歌地图采用的是WGS84地理坐标系(中国范围除外);
7. * 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。
8. * 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;
9. * 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。
10. */
11. public class PositionUtil {
12.
13. public static final String BAIDU_LBS_TYPE = "bd09ll";
14.
15. public static double pi = 3.1415926535897932384626;
16. public static double a = 6378245.0;
17. public static double ee = 0.00669342162296594323;
18.
19. /**
20. * 84 to 火星坐标系 (GCJ-02) World Geodetic System ==> Mars Geodetic System
21. *
22. * @param lat
23. * @param lon
24. * @return
25. */
26. public static Gps gps84_To_Gcj02(double lat, double lon) {
27. if (outOfChina(lat, lon)) {
28. return null;
29. }
30. double dLat = transformLat(lon - 105.0, lat - 35.0);
31. double dLon = transformLon(lon - 105.0, lat - 35.0);
32. double radLat = lat / 180.0 * pi;
33. double magic = Math.sin(radLat);
34. magic = 1 - ee * magic * magic;
35. double sqrtMagic = Math.sqrt(magic);
36. dLat = (dLat * 180.0) / ((a * (1 - ee)) / (magic * sqrtMagic) * pi);
37. dLon = (dLon * 180.0) / (a / sqrtMagic * Math.cos(radLat) * pi);
38. double mgLat = lat + dLat;
39. double mgLon = lon + dLon;
40. return new Gps(mgLat, mgLon);
41. }
42.
43. /**
44. * * 火星坐标系 (GCJ-02) to 84 * * @param lon * @param lat * @return
45. * */
46. public static Gps gcj_To_Gps84(double lat, double lon) {
47. Gps gps = transform(lat, lon);
48. double lontitude = lon * 2 - gps.getWgLon();
49. double latitude = lat * 2 - gps.getWgLat();
50. return new Gps(latitude, lontitude);
51. }
52.
53. /**
54. * 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
55. *
56. * @param gg_lat
57. * @param gg_lon
58. */
59. public static Gps gcj02_To_Bd09(double gg_lat, double gg_lon) {
60. double x = gg_lon, y = gg_lat;
61. double z = Math.sqrt(x * x + y * y) + 0.00002 * Math.sin(y * pi);
62. double theta = Math.atan2(y, x) + 0.000003 * Math.cos(x * pi);
63. double bd_lon = z * Math.cos(theta) + 0.0065;
64. double bd_lat = z * Math.sin(theta) + 0.006;
65. return new Gps(bd_lat, bd_lon);
66. }
67.
68. /**
69. * * 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
70. * bd_lat * @param bd_lon * @return
71. */
72. public static Gps bd09_To_Gcj02(double bd_lat, double bd_lon) {
73. double x = bd_lon - 0.0065, y = bd_lat - 0.006;
74. double z = Math.sqrt(x * x + y * y) - 0.00002 * Math.sin(y * pi);
75. double theta = Math.atan2(y, x) - 0.000003 * Math.cos(x * pi);
76. double gg_lon = z * Math.cos(theta);
77. double gg_lat = z * Math.sin(theta);
78. return new Gps(gg_lat, gg_lon);
79. }
80.
81. /**
82. * (BD-09)-->84
83. * @param bd_lat
84. * @param bd_lon
85. * @return
86. */
87. public static Gps bd09_To_Gps84(double bd_lat, double bd_lon) {
88.
89. Gps gcj02 = PositionUtil.bd09_To_Gcj02(bd_lat, bd_lon);
90. Gps map84 = PositionUtil.gcj_To_Gps84(gcj02.getWgLat(),
91. gcj02.getWgLon());
92. return map84;
93.
94. }
95.
96. public static boolean outOfChina(double lat, double lon) {
97. if (lon < 72.004 || lon > 137.8347)
98. return true;
99. if (lat < 0.8293 || lat > 55.8271)
100. return true;
101. return false;
102. }
103.
104. public static Gps transform(double lat, double lon) {
105. if (outOfChina(lat, lon)) {
106. return new Gps(lat, lon);
107. }
108. double dLat = transformLat(lon - 105.0, lat - 35.0);
109. double dLon = transformLon(lon - 105.0, lat - 35.0);
110. double radLat = lat / 180.0 * pi;
111. double magic = Math.sin(radLat);
112. magic = 1 - ee * magic * magic;
113. double sqrtMagic = Math.sqrt(magic);
114. dLat = (dLat * 180.0) / ((a * (1 - ee)) / (magic * sqrtMagic) * pi);
115. dLon = (dLon * 180.0) / (a / sqrtMagic * Math.cos(radLat) * pi);
116. double mgLat = lat + dLat;
117. double mgLon = lon + dLon;
118. return new Gps(mgLat, mgLon);
119. }
120.
121. public static double transformLat(double x, double y) {
122. double ret = -100.0 + 2.0 * x + 3.0 * y + 0.2 * y * y + 0.1 * x * y
123. + 0.2 * Math.sqrt(Math.abs(x));
124. ret += (20.0 * Math.sin(6.0 * x * pi) + 20.0 * Math.sin(2.0 * x * pi)) * 2.0 / 3.0;
125. ret += (20.0 * Math.sin(y * pi) + 40.0 * Math.sin(y / 3.0 * pi)) * 2.0 / 3.0;
126. ret += (160.0 * Math.sin(y / 12.0 * pi) + 320 * Math.sin(y * pi / 30.0)) * 2.0 / 3.0;
127. return ret;
128. }
129.
130. public static double transformLon(double x, double y) {
131. double ret = 300.0 + x + 2.0 * y + 0.1 * x * x + 0.1 * x * y + 0.1
132. * Math.sqrt(Math.abs(x));
133. ret += (20.0 * Math.sin(6.0 * x * pi) + 20.0 * Math.sin(2.0 * x * pi)) * 2.0 / 3.0;
134. ret += (20.0 * Math.sin(x * pi) + 40.0 * Math.sin(x / 3.0 * pi)) * 2.0 / 3.0;
135. ret += (150.0 * Math.sin(x / 12.0 * pi) + 300.0 * Math.sin(x / 30.0
136. * pi)) * 2.0 / 3.0;
137. return ret;
138. }
139.
140. public static void main(String[] args) {
141.
142. // 北斗芯片获取的经纬度为WGS84地理坐标 31.426896,119.496145
143. Gps gps = new Gps(31.426896, 119.496145);
144. System.out.println("gps :" + gps);
145. Gps gcj = gps84_To_Gcj02(gps.getWgLat(), gps.getWgLon());
146. System.out.println("gcj :" + gcj);
147. Gps star = gcj_To_Gps84(gcj.getWgLat(), gcj.getWgLon());
148. System.out.println("star:" + star);
149. Gps bd = gcj02_To_Bd09(gcj.getWgLat(), gcj.getWgLon());
150. System.out.println("bd :" + bd);
151. Gps gcj2 = bd09_To_Gcj02(bd.getWgLat(), bd.getWgLon());
152. System.out.println("gcj :" + gcj2);
153. }
154. }