地球坐标系(WGS - 84)转火星坐标系(GCJ)
package com.tdt.convert.utils;import java.math.BigDecimal;/*** @author Mr.superbeyone* @project coordinate-convert-tools* @className LngLatConvertUtil* @description 地球坐标系(WGS - 84)转火星坐标系(GCJ)* @date -04-14 10:21**/public class LngLatConvertUtil {private static final double PI = 3.14159265358979324;private static final double a = 6378245.0;private static final double EE = 0.00669342162296594323;/*** 地球坐标系(WGS-84)转火星坐标系(GCJ)** @param wgLon 地球坐标系(WGS-84) 经度* @param wgLat 地球坐标系(WGS-84) 纬度* @return 火星坐标系(GCJ) 数组 0 经度；1 纬度*/public static double[] transform(BigDecimal wgLon, BigDecimal wgLat) {return transform(wgLon.doubleValue(), wgLat.doubleValue());}/*** 地球坐标系(WGS-84)转火星坐标系(GCJ)** @param wgLon 地球坐标系(WGS-84) 经度* @param wgLat 地球坐标系(WGS-84) 纬度* @return 火星坐标系(GCJ) 数组 0 经度；1 纬度*/public static double[] transform(double wgLon, double wgLat) {double[] result = new double[2];if (outOfChina(wgLon, wgLat)) {result[0] = wgLon;result[1] = wgLat;return result;}double dLat = transformLat(wgLon - 105.0, wgLat - 35.0);double dLon = transformLon(wgLon - 105.0, wgLat - 35.0);double radLat = wgLat / 180.0 * PI;double magic = Math.sin(radLat);magic = 1 - EE * magic * magic;double sqrtMagic = Math.sqrt(magic);dLat = (dLat * 180.0) / ((a * (1 - EE)) / (magic * sqrtMagic) * PI);dLon = (dLon * 180.0) / (a / sqrtMagic * Math.cos(radLat) * PI);result[0] = wgLon + dLon;result[1] = wgLat + dLat;return result;}private static double transformLon(double x, double y) {double ret = 300.0 + x + 2.0 * y + 0.1 * x * x + 0.1 * x * y + 0.1 * Math.sqrt(Math.abs(x));ret += (20.0 * Math.sin(6.0 * x * PI) + 20.0 * Math.sin(2.0 * x * PI)) * 2.0 / 3.0;ret += (20.0 * Math.sin(x * PI) + 40.0 * Math.sin(x / 3.0 * PI)) * 2.0 / 3.0;ret += (150.0 * Math.sin(x / 12.0 * PI) + 300.0 * Math.sin(x / 30.0 * PI)) * 2.0 / 3.0;return ret;}private static double transformLat(double x, double y) {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));ret += (20.0 * Math.sin(6.0 * x * PI) + 20.0 * Math.sin(2.0 * x * PI)) * 2.0 / 3.0;ret += (20.0 * Math.sin(y * PI) + 40.0 * Math.sin(y / 3.0 * PI)) * 2.0 / 3.0;ret += (160.0 * Math.sin(y / 12.0 * PI) + 320 * Math.sin(y * PI / 30.0)) * 2.0 / 3.0;return ret;}/*** 在中国范围内** @param lon 经度* @param lat 纬度* @return true 出中国*/private static boolean outOfChina(double lon, double lat) {if ((lon < 72.004 || lon > 137.8347) && (lat < 0.8293 || lat > 55.8271)) {return true;} else {return false;}}}
Mr.superbeyone
