gps2bd.cs
``````﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Utils;
using System.IO;
//将gps坐标转换成百度坐标  不用看
namespace Mr_newbiebt
{
clast gps2bd
{
/*
BD-09：百度坐标偏移标准，Baidu Map使用
*/

static double pi = 3.14159265358979324;
static double a = 6378245.0;
static double ee = 0.00669342162296594323;
public const double x_pi = 3.14159265358979324 * 3000.0 / 180.0;
//Vector2d src;
//Vector2d result;
//void main()
//{
//    src =new Vector2d (39.10705, 117.17314);
//    result = wgs2bd(src);
//    Console.WriteLine(result.ToString());
//}
///
/// gps坐标转换成百度坐标，小数点前4位为准确坐标
///
/// 纬度
/// 经度
///
//public static double[] wgs2bd(double lat, double lon)
public static Vector2d wgs2bd(Vector2d src)
{
double lat = src.x;
double lon = src.y;
Vector2d result;
double[] dwgs2gcj = wgs2gcj(lat, lon);
double[] dgcj2bd = gcj2bd(dwgs2gcj[0], dwgs2gcj[1]);
result.x = dgcj2bd[0];
result.y = dgcj2bd[1];
return result;
}

public static double[] gcj2bd(double lat, double lon)
{
double x = lon, y = lat;
double z = Math.Sqrt(x * x + y * y) + 0.00002 * Math.Sin(y * x_pi);
double theta = Math.Atan2(y, x) + 0.000003 * Math.Cos(x * x_pi);
double bd_lon = z * Math.Cos(theta) + 0.0065;
double bd_lat = z * Math.Sin(theta) + 0.006;
return new double[] { bd_lat, bd_lon };
}

public static double[] bd2gcj(double lat, double lon)
{
double x = lon - 0.0065, y = lat - 0.006;
double z = Math.Sqrt(x * x + y * y) - 0.00002 * Math.Sin(y * x_pi);
double theta = Math.Atan2(y, x) - 0.000003 * Math.Cos(x * x_pi);
double gg_lon = z * Math.Cos(theta);
double gg_lat = z * Math.Sin(theta);
return new double[] { gg_lat, gg_lon };
}

public static double[] wgs2gcj(double lat, double lon)
{
double dLat = transformLat(lon - 105.0, lat - 35.0);
double dLon = transformLon(lon - 105.0, lat - 35.0);
double radLat = lat / 180.0 * pi;
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);
double mgLat = lat + dLat;
double mgLon = lon + dLon;
double[] loc = { mgLat, mgLon };
return loc;
}

private static double transformLat(double lat, double lon)
{
double ret = -100.0 + 2.0 * lat + 3.0 * lon + 0.2 * lon * lon + 0.1 * lat * lon + 0.2 * Math.Sqrt(Math.Abs(lat));
ret += (20.0 * Math.Sin(6.0 * lat * pi) + 20.0 * Math.Sin(2.0 * lat * pi)) * 2.0 / 3.0;
ret += (20.0 * Math.Sin(lon * pi) + 40.0 * Math.Sin(lon / 3.0 * pi)) * 2.0 / 3.0;
ret += (160.0 * Math.Sin(lon / 12.0 * pi) + 320 * Math.Sin(lon * pi / 30.0)) * 2.0 / 3.0;
return ret;
}

private static double transformLon(double lat, double lon)
{
double ret = 300.0 + lat + 2.0 * lon + 0.1 * lat * lat + 0.1 * lat * lon + 0.1 * Math.Sqrt(Math.Abs(lat));
ret += (20.0 * Math.Sin(6.0 * lat * pi) + 20.0 * Math.Sin(2.0 * lat * pi)) * 2.0 / 3.0;
ret += (20.0 * Math.Sin(lat * pi) + 40.0 * Math.Sin(lat / 3.0 * pi)) * 2.0 / 3.0;
ret += (150.0 * Math.Sin(lat / 12.0 * pi) + 300.0 * Math.Sin(lat / 30.0 * pi)) * 2.0 / 3.0;
return ret;
}
}
}
``````