knowledge:electronic:wgs84_conversion
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| knowledge:electronic:wgs84_conversion [2017/10/05 08:33] – 弘毅 | knowledge:electronic:wgs84_conversion [2025/10/11 02:55] (当前版本) – 外部编辑 127.0.0.1 | ||
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| + | ====== WGS84、GCJ02、BD09坐标系标转 ====== | ||
| + | ^坐标系^名称^解释^使用地图^ | ||
| + | |WGS84|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, | ||
| + | |GCJ02|火星坐标系|由中国国家测绘局制订的地理信息系统的坐标系统。并要求在中国使用的地图产品使用的都必须是加密后的坐标,而这套WGS84加密后的坐标就是GCJ02|腾讯(搜搜)地图,阿里云地图,高德地图,谷歌国内地图| | ||
| + | |BD09|百度坐标系|百度在GCJ02的基础上进行了二次加密,官方解释是为了进一步保护用户隐私|百度地图| | ||
| + | |小众坐标系|类似于百度地图|在GCJ02基础上使用自己的加密算法进行二次加密的坐标系|搜狗地图、图吧地图等| | ||
| + | < | ||
| + | public static double pi = 3.1415926535897932384626; | ||
| + | public static double a = 6378245.0; | ||
| + | public static double ee = 0.00669342162296594323; | ||
| + | </ | ||
| + | |||
| + | ===== 火星坐标 转 百度坐标 ===== | ||
| + | |||
| + | < | ||
| + | /** | ||
| + | * 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 | ||
| + | */ | ||
| + | public static Gps gcj02_To_Bd09(double gg_lat, double gg_lon) { | ||
| + | double x = gg_lon, y = gg_lat; | ||
| + | double z = Math.sqrt(x * x + y * y) + 0.00002 * Math.sin(y * pi); | ||
| + | double theta = Math.atan2(y, | ||
| + | double bd_lon = z * Math.cos(theta) + 0.0065; | ||
| + | double bd_lat = z * Math.sin(theta) + 0.006; | ||
| + | return new Gps(bd_lat, bd_lon); | ||
| + | </ | ||
| + | |||
| + | ===== 百度坐标 转 火星坐标 ===== | ||
| + | |||
| + | < | ||
| + | /** | ||
| + | * 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 | ||
| + | */ | ||
| + | public static Gps bd09_To_Gcj02(double bd_lat, double bd_lon) { | ||
| + | double x = bd_lon - 0.0065, y = bd_lat - 0.006; | ||
| + | double z = Math.sqrt(x * x + y * y) - 0.00002 * Math.sin(y * pi); | ||
| + | double theta = Math.atan2(y, | ||
| + | double gg_lon = z * Math.cos(theta); | ||
| + | double gg_lat = z * Math.sin(theta); | ||
| + | return new Gps(gg_lat, gg_lon); | ||
| + | } | ||
| + | </ | ||
| + | |||
| + | ===== 地球坐标 转 火星坐标 ===== | ||
| + | |||
| + | < | ||
| + | /** | ||
| + | * 地球坐标系 (WGS84) 与火星坐标系 (GCJ-02) 的转换算法 将 WGS84 坐标转换成 GCJ-02 坐标 | ||
| + | */ | ||
| + | public static Gps gps84_To_Gcj02(double lat, double lon) { | ||
| + | if (outOfChina(lat, | ||
| + | return null; | ||
| + | } | ||
| + | double dLat = transformLat(lon - 105.0, lat - 35.0); | ||
| + | double dLon = transformLon(lon - 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); | ||
| + | dLon = (dLon * 180.0) / (a / sqrtMagic * Math.cos(radLat) * pi); | ||
| + | double mgLat = lat + dLat; | ||
| + | double mgLon = lon + dLon; | ||
| + | return new Gps(mgLat, mgLon); | ||
| + | } | ||
| + | </ | ||
| + | |||
| + | ===== 火星坐标 转 地球坐标 ===== | ||
| + | |||
| + | < | ||
| + | /** | ||
| + | * 地球坐标系 (WGS84) 与火星坐标系 (GCJ-02) 的转换算法 将 GCJ-02 坐标转换成 WGS84 坐标 | ||
| + | */ | ||
| + | public static Gps gcj_To_Gps84(double lat, double lon) { | ||
| + | Gps gps = transform(lat, | ||
| + | double lontitude = lon * 2 - gps.getWgLon(); | ||
| + | double latitude = lat * 2 - gps.getWgLat(); | ||
| + | return new Gps(latitude, | ||
| + | } | ||
| + | </ | ||
| + | |||
| + | < | ||
| + | public static boolean outOfChina(double lat, double lon) { | ||
| + | if (lon < 72.004 || lon > 137.8347) return true; | ||
| + | if (lat < 0.8293 || lat > 55.8271) return true; | ||
| + | return false; | ||
| + | } | ||
| + | private static Gps transform(double lat, double lon) { | ||
| + | if (outOfChina(lat, | ||
| + | double dLat = transformLat(lon - 105.0, lat - 35.0); | ||
| + | double dLon = transformLon(lon - 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); | ||
| + | dLon = (dLon * 180.0) / (a / sqrtMagic * Math.cos(radLat) * pi); | ||
| + | double mgLat = lat + dLat; | ||
| + | double mgLon = lon + dLon; | ||
| + | return new Gps(mgLat, mgLon); | ||
| + | } | ||
| + | private static double transformLat(double x, double y) { | ||
| + | double ret = -100.0 + 2.0 * x + 3.0 * y + 0.2 * y * y + 0.1 * x * y | ||
| + | + 0.2 * Math.sqrt(Math.abs(x)); | ||
| + | ret += (20.0 * Math.sin(6.0 * x * pi) + 20.0 * Math.sin(2.0 * x * pi)) * 2.0 / 3.0; | ||
| + | ret += (20.0 * Math.sin(y * pi) + 40.0 * Math.sin(y / 3.0 * pi)) * 2.0 / 3.0; | ||
| + | ret += (160.0 * Math.sin(y / 12.0 * pi) + 320 * Math.sin(y * pi / 30.0)) * 2.0 / 3.0; | ||
| + | return ret; | ||
| + | } | ||
| + | private static double transformLon(double x, double y) { | ||
| + | double ret = 300.0 + x + 2.0 * y + 0.1 * x * x + 0.1 * x * y + 0.1 | ||
| + | * Math.sqrt(Math.abs(x)); | ||
| + | ret += (20.0 * Math.sin(6.0 * x * pi) + 20.0 * Math.sin(2.0 * x * pi)) * 2.0 / 3.0; | ||
| + | ret += (20.0 * Math.sin(x * pi) + 40.0 * Math.sin(x / 3.0 * pi)) * 2.0 / 3.0; | ||
| + | ret += (150.0 * Math.sin(x / 12.0 * pi) + 300.0 * Math.sin(x / 30.0 * pi)) * 2.0 / 3.0; | ||
| + | return ret; | ||
| + | } | ||
| + | </ | ||
| + | |||
| + | ===== 坐标距离计算 ===== | ||
| + | |||
| + | |||
| + | < | ||
| + | private final static double EARTH_RADIUS = 6378.137;// | ||
| + | private static double rad(double d) { | ||
| + | return d * Math.PI / 180.0; | ||
| + | } | ||
| + | /** | ||
| + | * 计算两点间距离 | ||
| + | * @return double 距离 单位公里, | ||
| + | */ | ||
| + | public static double GetDistance(double lat1, double lng1, double lat2, double lng2) { | ||
| + | double radLat1 = rad(lat1); | ||
| + | double radLat2 = rad(lat2); | ||
| + | double a = radLat1 - radLat2; | ||
| + | double b = rad(lng1) - rad(lng2); | ||
| + | double s = 2 * Math.asin(Math.sqrt(Math.pow(Math.sin(a / 2), 2) + | ||
| + | Math.cos(radLat1) * Math.cos(radLat2) * Math.pow(Math.sin(b / 2), 2))); | ||
| + | s = s * EARTH_RADIUS; | ||
| + | s = new BigDecimal(s).setScale(3, | ||
| + | return s; | ||
| + | } | ||
| + | </ | ||
