各种国内地图坐标系总结 |
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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 137.8347) 98. return true; 99. if (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. } |
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