package com.dsh.competition.util;
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import org.gavaghan.geodesy.Ellipsoid;
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import org.gavaghan.geodesy.GeodeticCalculator;
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import org.gavaghan.geodesy.GeodeticCurve;
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import org.gavaghan.geodesy.GlobalCoordinates;
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import java.util.HashMap;
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import java.util.Map;
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/**
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* 计算两个金纬度坐标之间的直线距离
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*/
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public class GeodesyUtil {
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/**
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* 获取直线距离
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*
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* @param fromLonLat
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* @param toLonLat
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* @return
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*/
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public static Map<String, Double> getDistance(String fromLonLat, String toLonLat) {
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String[] from = fromLonLat.split(",");
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String[] to = toLonLat.split(",");
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GlobalCoordinates source = new GlobalCoordinates(Double.valueOf(from[1]), Double.valueOf(from[0]));
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GlobalCoordinates target = new GlobalCoordinates(Double.valueOf(to[1]), Double.valueOf(to[0]));
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double Sphere = getDistanceMeter(source, target, Ellipsoid.Sphere);
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double WGS84 = getDistanceMeter(source, target, Ellipsoid.WGS84);
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double GRS80 = getDistanceMeter(source, target, Ellipsoid.GRS80);
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double GRS67 = getDistanceMeter(source, target, Ellipsoid.GRS67);
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double ANS = getDistanceMeter(source, target, Ellipsoid.ANS);
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double WGS72 = getDistanceMeter(source, target, Ellipsoid.WGS72);
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double Clarke1858 = getDistanceMeter(source, target, Ellipsoid.Clarke1858);
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double Clarke1880 = getDistanceMeter(source, target, Ellipsoid.Clarke1880);
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// System.out.println("Sphere坐标系计算结果："+Sphere + "米");
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// System.out.println("WGS84坐标系计算结果："+WGS84 + "米");
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// System.out.println("GRS80坐标系计算结果："+GRS80 + "米");
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// System.out.println("GRS67坐标系计算结果："+GRS67 + "米");
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// System.out.println("ANS坐标系计算结果："+ANS + "米");
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// System.out.println("WGS72坐标系计算结果："+WGS72 + "米");
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// System.out.println("Clarke1858坐标系计算结果："+Clarke1858 + "米");
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// System.out.println("Clarke1880坐标系计算结果："+Clarke1880 + "米");
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Map<String, Double> map = new HashMap<>();
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map.put("Sphere", Sphere);
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map.put("WGS84", WGS84);
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map.put("GRS80", GRS80);
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map.put("GRS67", GRS67);
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map.put("ANS", ANS);
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map.put("WGS72", WGS72);
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map.put("Clarke1858", Clarke1858);
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map.put("Clarke1880", Clarke1880);
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return map;
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}
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private static double getDistanceMeter(GlobalCoordinates gpsFrom, GlobalCoordinates gpsTo, Ellipsoid ellipsoid) {
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//创建GeodeticCalculator，调用计算方法，传入坐标系、经纬度用于计算距离
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GeodeticCurve geoCurve = new GeodeticCalculator().calculateGeodeticCurve(ellipsoid, gpsFrom, gpsTo);
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return geoCurve.getEllipsoidalDistance();
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}
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}
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