高德SDK获取到的坐标转换为GPS真实坐标方法,Java版
发现高德SDK不提供高德的坐标转GPS坐标(GCJ_02转WGS_84),下面是一份Java版的
/**************************** 文件名:GCJ2WGS.java 创建时间: 所在包:com 作者: 说明:该类的delta方法可以将高德地图SDK获取到的GPS经纬度转换为真实的经纬度。 ****************************/ package com; import java.util.HashMap; public class GCJ2WGS { public static void main(String[] args) { GCJ2WGS wg = new GCJ2WGS(); HashMap<String, Double> hm = wg.delta(38.123456,114.654321); System.out.println(hm); } //圆周率 GCJ_02_To_WGS_84 double PI = 3.14159265358979324; /** * @author 作者: * 方法描述:方法可以将高德地图SDK获取到的GPS经纬度转换为真实的经纬度,可以用于解决安卓系统使用高德SDK获取经纬度的转换问题。 * @param 需要转换的经纬度 * @return 转换为真实GPS坐标后的经纬度 * @throws <异常类型> {@inheritDoc} 异常描述 */ public HashMap<String, Double> delta(double lat,double lon) { double a = 6378245.0;//克拉索夫斯基椭球参数长半轴a double ee = 0.00669342162296594323;//克拉索夫斯基椭球参数第一偏心率平方 double dLat = this.transformLat(lon - 105.0, lat - 35.0); double dLon = this.transformLon(lon - 105.0, lat - 35.0); double radLat = lat / 180.0 * this.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) * this.PI); dLon = (dLon * 180.0) / (a / sqrtMagic * Math.cos(radLat) * this.PI); HashMap<String, Double> hm = new HashMap<String, Double>(); hm.put("lat",lat - dLat); hm.put("lon",lon - dLon); return hm; } //转换经度 public 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 * this.PI) + 20.0 * Math.sin(2.0 * x * this.PI)) * 2.0 / 3.0; ret += (20.0 * Math.sin(x * this.PI) + 40.0 * Math.sin(x / 3.0 * this.PI)) * 2.0 / 3.0; ret += (150.0 * Math.sin(x / 12.0 * this.PI) + 300.0 * Math.sin(x / 30.0 * this.PI)) * 2.0 / 3.0; return ret; } //转换纬度 public 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 * this.PI) + 20.0 * Math.sin(2.0 * x * this.PI)) * 2.0 / 3.0; ret += (20.0 * Math.sin(y * this.PI) + 40.0 * Math.sin(y / 3.0 * this.PI)) * 2.0 / 3.0; ret += (160.0 * Math.sin(y / 12.0 * this.PI) + 320 * Math.sin(y * this.PI / 30.0)) * 2.0 / 3.0; return ret; } }