开发中经常会遇到计算两个点(经纬度)之间的距离或者计算最近门店的场景,下面简单实现一下如何计算两个经纬度之间相隔的距离。
1、导入geodesy的maven依赖 或者到阿里云maven仓库下载jar包
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<dependency> <groupId>org.gavaghan</groupId> <artifactId>geodesy</artifactId> <version>1.1.3</version> </dependency> |
2、实现计算
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package com.test.gps; import org.gavaghan.geodesy.Ellipsoid; import org.gavaghan.geodesy.GeodeticCalculator; import org.gavaghan.geodesy.GeodeticCurve; import org.gavaghan.geodesy.GlobalCoordinates; public class CaculateDistanceTest { public static void main(String[] args) { GlobalCoordinates source = new GlobalCoordinates(29.490295, 106.486654); GlobalCoordinates target = new GlobalCoordinates(29.615467, 106.581515); double meter1 = getDistanceMeter(source, target, Ellipsoid.Sphere); double meter2 = getDistanceMeter(source, target, Ellipsoid.WGS84); System. out .println( "Sphere坐标系计算结果:" +meter1 + "米" ); System. out .println( "WGS84坐标系计算结果:" +meter2 + "米" ); } public static double getDistanceMeter(GlobalCoordinates gpsFrom, GlobalCoordinates gpsTo, Ellipsoid ellipsoid) { //创建GeodeticCalculator,调用计算方法,传入坐标系、经纬度用于计算距离 GeodeticCurve geoCurve = new GeodeticCalculator().calculateGeodeticCurve(ellipsoid, gpsFrom, gpsTo); return geoCurve.getEllipsoidalDistance(); } } |
3、输出结果:
对比百度地图,计算结果和Sphere坐标系计算结果一致,表明计算结果正确,WGS84坐标系的计算结果存在几十米的误差。不同的坐标系精度不同,计算结果不一样。大家根据实际情况自己选择。
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