Java 根據經緯度計算實際距離

maven庫導包

        <dependency>
            　　<groupId>org.gavaghan</groupId>
            　　<artifactId>geodesy</artifactId>
            　　<version>1.1.3</version>
        </dependency>

import org.gavaghan.geodesy.Ellipsoid;
import org.gavaghan.geodesy.GeodeticCalculator;
import org.gavaghan.geodesy.GeodeticCurve;
import org.gavaghan.geodesy.GlobalCoordinates;

public class test {
    public static void main(String[] args)
    {
        // //121.717594,31.12055    121.817629,31.090867
        GlobalCoordinates source = new GlobalCoordinates(31.12055, 121.717594);
        GlobalCoordinates target = new GlobalCoordinates(31.090867, 121.817629);
 
        double meter1 = getDistanceMeter(source, target, Ellipsoid.Sphere);
        double meter2 = getDistanceMeter(source, target, Ellipsoid.WGS84);
 
        System.out.println("Sphere座標系計算結果："+meter1 + "米");
        System.out.println("WGS84座標系計算結果："+meter2 + "米");
    }
 
    public static double getDistanceMeter(GlobalCoordinates gpsFrom, GlobalCoordinates gpsTo, Ellipsoid ellipsoid)
    {
        //創建GeodeticCalculator，調用計算方法，傳入座標系、經緯度用於計算距離
        GeodeticCurve geoCurve = new GeodeticCalculator().calculateGeodeticCurve(ellipsoid, gpsFrom, gpsTo);
 
        return geoCurve.getEllipsoidalDistance();
    }
}

 對比百度地圖，計算結果和Sphere座標系計算結果一致，表明計算結果正確，WGS84座標系的計算結果存在幾十米的誤差。不同的座標系精度不同，計算結果不一樣。