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Java经纬度坐标转换

Java经纬度坐标转换

作者: I_Gisvity | 来源:发表于2019-06-10 11:27 被阅读0次

    Java经纬度坐标转换

    package com.zehin.map.util;
    
    public class GPSUtil {  
        public static double pi = 3.1415926535897932384626;  
        public static double x_pi = 3.14159265358979324 * 3000.0 / 180.0;  
        public static double a = 6378245.0;  
        public static double ee = 0.00669342162296594323;  
    
        public 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;  
        }  
    
        public 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;  
        }  
        public static double[] transform(double lat, double lon) {  
            if (outOfChina(lat, lon)) {  
                return new double[]{lat,lon};  
            }  
            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 double[]{mgLat,mgLon};  
        }  
        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;  
        }  
        /** 
         * 84 to 火星坐标系 (GCJ-02) World Geodetic System ==> Mars Geodetic System 
         * 
         * @param lat 
         * @param lon 
         * @return 
         */  
        public static double[] gps84_To_Gcj02(double lat, double lon) {  
            if (outOfChina(lat, lon)) {  
                return new double[]{lat,lon};  
            }  
            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 double[]{mgLat, mgLon};  
        }  
    
        /** 
         * * 火星坐标系 (GCJ-02) to 84 * * @param lon * @param lat * @return 
         * */  
        public static double[] gcj02_To_Gps84(double lat, double lon) {  
            double[] gps = transform(lat, lon);  
            double lontitude = lon * 2 - gps[1];  
            double latitude = lat * 2 - gps[0];  
            return new double[]{latitude, lontitude};  
        }  
        /** 
         * 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 
         * 
         * @param lat 
         * @param lon 
         */  
        public static double[] gcj02_To_Bd09(double lat, double lon) {  
            double x = lon, y = lat;  
            double z = Math.sqrt(x * x + y * y) + 0.00002 * Math.sin(y * x_pi);  
            double theta = Math.atan2(y, x) + 0.000003 * Math.cos(x * x_pi);  
            double tempLon = z * Math.cos(theta) + 0.0065;  
            double tempLat = z * Math.sin(theta) + 0.006;  
            double[] gps = {tempLat,tempLon};  
            return gps;  
        }  
    
        /** 
         * * 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 
         * bd_lat * @param bd_lon * @return 
         */  
        public static double[] bd09_To_Gcj02(double lat, double lon) {  
            double x = lon - 0.0065, y = lat - 0.006;  
            double z = Math.sqrt(x * x + y * y) - 0.00002 * Math.sin(y * x_pi);  
            double theta = Math.atan2(y, x) - 0.000003 * Math.cos(x * x_pi);  
            double tempLon = z * Math.cos(theta);  
            double tempLat = z * Math.sin(theta);  
            double[] gps = {tempLat,tempLon};  
            return gps;  
        }  
    
        /**将gps84转为bd09 
         * @param lat 
         * @param lon 
         * @return 
         */  
        public static double[] gps84_To_bd09(double lat,double lon){  
            double[] gcj02 = gps84_To_Gcj02(lat,lon);  
            double[] bd09 = gcj02_To_Bd09(gcj02[0],gcj02[1]);  
            return bd09;  
        }  
        public static double[] bd09_To_gps84(double lat,double lon){  
            double[] gcj02 = bd09_To_Gcj02(lat, lon);  
            double[] gps84 = gcj02_To_Gps84(gcj02[0], gcj02[1]);  
            //保留小数点后六位  
            gps84[0] = retain6(gps84[0]);  
            gps84[1] = retain6(gps84[1]);  
            return gps84;  
        }  
    
        /**保留小数点后六位 
         * @param num 
         * @return 
         */  
        private static double retain6(double num){  
            String result = String .format("%.6f", num);  
            return Double.valueOf(result);  
        }  
    }
    
    

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