package urt;
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/**¼ÆËã2¸ö¾Î³¶ÈÖ®¼äµÄ¾àÀë·½·¨*/
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public class CaculateDistance {
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private final static double EARTH_RADIUS = 6378.137;
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private static double rad(double d) {
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return d * Math.PI / 180.0;
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}
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/**
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* ¸ù¾ÝÁ½µã¼ä¾Î³¶È×ø±ê£¨doubleÖµ£©£¬¼ÆËãÁ½µã¼ä¾àÀ룬µ¥Î»ÎªÃ×
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*/
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public static double GetDistance(double lat1, double lng1, double lat2, double lng2) {
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double radLat1 = rad(lat1);
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double radLat2 = rad(lat2);
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double a = radLat1 - radLat2;
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double b = rad(lng1) - rad(lng2);
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double s = 2 * Math.asin(Math.sqrt(
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Math.pow(Math.sin(a / 2), 2) + Math.cos(radLat1) * Math.cos(radLat2) * Math.pow(Math.sin(b / 2), 2)));
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s = s * EARTH_RADIUS;
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s = (s * 10000) / 10;
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return s;
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}
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}
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