如何計算GPS JAVA中兩點之間的距離？

Question

可能重複：
How do I calculate distance between two latitude longitude points?

如何計算兩個點是在JAVA的緯度和經度值之間的距離？

感謝

Answer 1

看看這個：http://www.zipcodeworld.com/samples/distance.java.html

由於上述鏈接斷開看看這個：Calculate distance between two latitude-longitude points? (Haversine formula)。

這篇文章的摘要：

public final static double AVERAGE_RADIUS_OF_EARTH = 6371; 
public int calculateDistance(double userLat, double userLng, double venueLat, double venueLng) { 

    double latDistance = Math.toRadians(userLat - venueLat); 
    double lngDistance = Math.toRadians(userLng - venueLng); 

    double a = (Math.sin(latDistance/2) * Math.sin(latDistance/2)) + 
        (Math.cos(Math.toRadians(userLat))) * 
        (Math.cos(Math.toRadians(venueLat))) * 
        (Math.sin(lngDistance/2)) * 
        (Math.sin(lngDistance/2)); 

    double c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a)); 

    return (int) (Math.round(AVERAGE_RADIUS_OF_EARTH * c)); 

}