GZ/nwyj/.svn/pristine/8d/8d331c5fbe0ec8f025d321b0d97f0de732b017e3.svn-base

package com.cockpit.util;

import com.cockpit.vo.Gps;

/** 
 * 各地图API坐标系统比较与转换; 
 * 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, 
 * 谷歌地图采用的是WGS84地理坐标系（中国范围除外）; 
 * 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。 
 * 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; 
 * 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 
 */  
public class PositionUtil {  
      
    public static final String BAIDU_LBS_TYPE = "bd09ll";  
      
    public static double pi = 3.1415926535897932384626;  
    public static double a = 6378245.0;  
    public static double ee = 0.00669342162296594323;  
  
    /** 
     * 84 to 火星坐标系 (GCJ-02) World Geodetic System ==> Mars Geodetic System 
     *  
     * @param lat 
     * @param lon 
     * @return 
     */  
    public static Gps gps84_To_Gcj02(double lat, double lon) {  
        if (outOfChina(lat, lon)) {  
            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);  
    }  
  
    /** 
     * * 火星坐标系 (GCJ-02) to 84 * * @param lon * @param lat * @return 
     * */  
    public static Gps gcj_To_Gps84(double lat, double lon) {  
        Gps gps = transform(lat, lon);  
        double lontitude = lon * 2 - gps.getWgLon();  
        double latitude = lat * 2 - gps.getWgLat();  
        return new Gps(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 gg_lat 
     * @param gg_lon 
     */  
    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, x) + 0.000003 * Math.cos(x * pi);  
        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);  
    }  
  
    /** 
     * * 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 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, x) - 0.000003 * Math.cos(x * pi);  
        double gg_lon = z * Math.cos(theta);  
        double gg_lat = z * Math.sin(theta);  
        return new Gps(gg_lat, gg_lon);  
    }  
  
    /** 
     * (BD-09)-->84 
     * @param bd_lat 
     * @param bd_lon 
     * @return 
     */  
    public static Gps bd09_To_Gps84(double bd_lat, double bd_lon) {  
  
        Gps gcj02 = PositionUtil.bd09_To_Gcj02(bd_lat, bd_lon);  
        Gps map84 = PositionUtil.gcj_To_Gps84(gcj02.getWgLat(),  
                gcj02.getWgLon());  
        return map84;  
  
    }  
  
    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;  
    }  
  
    public static Gps transform(double lat, double lon) {  
        if (outOfChina(lat, lon)) {  
            return new Gps(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 Gps(mgLat, mgLon);  
    }  
  
    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;  
    }  
    
	/**
	 * 转换坐标度数
	 * @param pos
	 * @return
	 */
	public double tempXY(String pos){
//		22°44′52.15"″
//		23°9′25.42"″
//		System.out.println(pos);
		double res = 0;
		
		try{
			pos = pos.substring(0,pos.length()-1);
			String du = pos.split("°")[0];
			pos = pos.split("°")[1];
			String feng = pos.split("′")[0];
			pos = pos.split("′")[1];
			String miao = pos.split("\"")[0];
			
			res += Double.parseDouble(du);
			res += Double.parseDouble(feng)/60.0;
			res += Double.parseDouble(miao)/3600.0;
		}catch(NumberFormatException e){
			res = 0;
		}catch(StringIndexOutOfBoundsException e){
			res = 0;
		}
				
		return res;
	};
  
    public static void main(String[] args) {  
  
        // 北斗芯片获取的经纬度为WGS84地理坐标 31.426896,119.496145  
        Gps gps = new Gps(31.426896, 119.496145);  
        System.out.println("gps :" + gps);  
        Gps gcj = gps84_To_Gcj02(gps.getWgLat(), gps.getWgLon());  
        System.out.println("gcj :" + gcj);  
        Gps star = gcj_To_Gps84(gcj.getWgLat(), gcj.getWgLon());  
        System.out.println("star:" + star);  
        Gps bd = gcj02_To_Bd09(gcj.getWgLat(), gcj.getWgLon());  
        System.out.println("bd  :" + bd);  
        Gps gcj2 = bd09_To_Gcj02(bd.getWgLat(), bd.getWgLon());  
        System.out.println("gcj :" + gcj2);  
    }  
}