package com.ruoyi.web.controller.tool;
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public class CoordinateTransform {
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private static final double PI = 3.1415926535897932384626;
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private static final double A = 6378245.0;
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private static final double EE = 0.00669342162296594323;
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private static final double X_PI = 3.14159265358979324 * 3000.0 / 180.0;
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/**
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* WGS84转GCJ-02坐标
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* @param wgLat WGS84坐标纬度
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* @param wgLon WGS84坐标经度
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* @return 转换后的GCJ-02坐标[纬度, 经度]
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*/
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public static double[] wgs84ToGcj02(double wgLat, double wgLon) {
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if (outOfChina(wgLat, wgLon)) {
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return new double[]{wgLat, wgLon};
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}
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double dLat = transformLat(wgLon - 105.0, wgLat - 35.0);
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double dLon = transformLon(wgLon - 105.0, wgLat - 35.0);
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double radLat = wgLat / 180.0 * PI;
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double magic = Math.sin(radLat);
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magic = 1 - EE * magic * magic;
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double sqrtMagic = Math.sqrt(magic);
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dLat = (dLat * 180.0) / ((A * (1 - EE)) / (magic * sqrtMagic) * PI);
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dLon = (dLon * 180.0) / (A / sqrtMagic * Math.cos(radLat) * PI);
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double mgLat = wgLat + dLat;
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double mgLon = wgLon + dLon;
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return new double[]{mgLat, mgLon};
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}
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/**
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* GCJ-02转BD09坐标（百度坐标系，腾讯地图部分接口可能使用）
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* @param ggLat GCJ-02坐标纬度
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* @param ggLon GCJ-02坐标经度
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* @return 转换后的BD09坐标[纬度, 经度]
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*/
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public static double[] gcj02ToBd09(double ggLat, double ggLon) {
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double x = ggLon, y = ggLat;
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double z = Math.sqrt(x * x + y * y) + 0.00002 * Math.sin(y * X_PI);
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double theta = Math.atan2(y, x) + 0.000003 * Math.cos(x * X_PI);
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double bdLon = z * Math.cos(theta) + 0.0065;
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double bdLat = z * Math.sin(theta) + 0.006;
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return new double[]{bdLat, bdLon};
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}
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/**
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* WGS84直接转BD09坐标
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* @param wgLat WGS84坐标纬度
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* @param wgLon WGS84坐标经度
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* @return 转换后的BD09坐标[纬度, 经度]
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*/
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public static double[] wgs84ToBd09(double wgLat, double wgLon) {
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double[] gcj02 = wgs84ToGcj02(wgLat, wgLon);
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return gcj02ToBd09(gcj02[0], gcj02[1]);
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}
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private static boolean outOfChina(double lat, double lon) {
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if (lon < 72.004 || lon > 137.8347)
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return true;
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if (lat < 0.8293 || lat > 55.8271)
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return true;
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return false;
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}
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private static double transformLat(double x, double y) {
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double ret = -100.0 + 2.0 * x + 3.0 * y + 0.2 * y * y + 0.1 * x * y + 0.2 * Math.sqrt(Math.abs(x));
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ret += (20.0 * Math.sin(6.0 * x * PI) + 20.0 * Math.sin(2.0 * x * PI)) * 2.0 / 3.0;
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ret += (20.0 * Math.sin(y * PI) + 40.0 * Math.sin(y / 3.0 * PI)) * 2.0 / 3.0;
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ret += (160.0 * Math.sin(y / 12.0 * PI) + 320 * Math.sin(y * PI / 30.0)) * 2.0 / 3.0;
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return ret;
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}
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private static double transformLon(double x, double y) {
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double ret = 300.0 + x + 2.0 * y + 0.1 * x * x + 0.1 * x * y + 0.1 * Math.sqrt(Math.abs(x));
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ret += (20.0 * Math.sin(6.0 * x * PI) + 20.0 * Math.sin(2.0 * x * PI)) * 2.0 / 3.0;
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ret += (20.0 * Math.sin(x * PI) + 40.0 * Math.sin(x / 3.0 * PI)) * 2.0 / 3.0;
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ret += (150.0 * Math.sin(x / 12.0 * PI) + 300.0 * Math.sin(x / 30.0 * PI)) * 2.0 / 3.0;
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return ret;
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}
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// 测试方法
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}
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