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MapÉϵĸù¾Ý¾­Î³¶ÈÇóµØÇò±íÃæÁ½µã¼ä¾àÀëµÄʵÏÖ£¬ ÓÃjavaʵÏÖÁËÒ»°Ñ£¬¶ÔÎÒ¹ú¾³ÄÚµÄBeijing54, Xian80,WGS84ÈýÖÖ×ø±êϵµÄ¿Õ¼ä¾àÀë¼ÆËã¸Ð¾õÕâ¸öʵÏÖÊDZȽÏ׼ȷµÄ¡£µ±È»£¬ÕâÀïÖ»ÊǸöÈ˵ĸоõ¶øÒÑ¡£¡£¡£¿ÉÄÜÎÒ»¹Ã»ÓÐÓöµ½ÄÇÖÖ¶Ô¾«¶ÈÒªÇó·Ç³£ÑϸñµÄµØ·½£¬»òÐí£¬±¾ÉíÎÒÕâ¸ö·½Ê½¾ÍÊÇ´íÎóµÄ¡£¡£¡£ºÇºÇ¡£¡£¡£ÕâÀïÖ»ÊÇ×÷¸ö¼ÇºÅÏÈ¡£¡£¡£¸÷λ´ïÈ˶à¶àÖ¸½Ì
package
com.geotools.test;
public class GeoUtils {
    public
enum GaussSphere{
        Beijing54,
        Xian80,
       
WGS84,
    }
    private static double Rad(double d){
        return d
* Math.PI / 180.0;
    }
 public double DistanceOfTwoPoints(double
lng1,double lat1,double lng2,double lat2,
   GaussSphere gs){
       
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 * (gs ==
GaussSphere.WGS84 ? 6378137.0 : (gs == GaussSphere.Xian80 ? 6378140.0 :
6378245.0));
        s = Math.round(s * 10000) / 10000;
        return
s;
 }
}


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