1、WGS84坐标转GCJ02火星坐标

        /// <summary>WGS84坐标转GCJ02火星坐标</summary>/// <param name="Position">坐标结构体</param>/// <returns>返回GCJ02火星坐标</returns>public coord WGS84ToGCJ02(coord Position){Double lon = Position.lon;Double lat = Position.lat;if (!isInChina(lon, lat)) return Position;coord Pos = offset(lon, lat);Pos.lon = lon + Pos.lon;Pos.lat = lat + Pos.lat;return Pos;}

2、GCJ02火星坐标转WGS84坐标（回归计算）

   /// <summary>GCJ02火星坐标转WGS84坐标</summary>/// <param name="Position">坐标结构体</param>/// <returns>返回WGS84火星坐标</returns>public coord GCJ02ToWGS84(coord Position){Double lon = Position.lon;Double lat = Position.lat;if (!isInChina(lon, lat)) return Position;coord Pos = Position;coord tempPoint = WGS84ToGCJ02(Pos);Double dx = tempPoint.lon - lon;Double dy = tempPoint.lat - lat;while (Math.Abs(dx) > 1e-14 || Math.Abs(dy) > 1e-14)//回归{Pos.lon -= dx;Pos.lat -= dy;tempPoint = WGS84ToGCJ02(Pos);dx = tempPoint.lon - lon;dy = tempPoint.lat - lat;}return Pos;}

3、GCJ02火星坐标转BD09百度坐标

        /// <summary>GCJ02火星坐标转BD09百度坐标</summary>/// <param name="Position">坐标结构体</param>/// <returns>返回BD09百度坐标</returns>public coord GCJ02ToBD09(coord Position){Double lon = Position.lon;Double lat = Position.lat;Double x = lon;Double y = lat;Double z = Math.Sqrt(x * x + y * y) + 0.00002 * Math.Sin(y * baiduFactor);Double theta = Math.Atan2(y, x) + 0.000003 * Math.Cos(x * baiduFactor);coord outPos;outPos.lon = z * Math.Cos(theta) + 0.0065;outPos.lat = z * Math.Sin(theta) + 0.006;return outPos;}

4、BD09百度坐标转GCJ02火星坐标（回归计算）

        /// <summary>BD09百度坐标转GCJ02火星坐标</summary>/// <param name="Position">坐标结构体</param>/// <returns>返回GCJ02火星坐标</returns>public coord BD09ToGCJ02(coord Position){Double lon = Position.lon;Double lat = Position.lat;Double x = lon - 0.0065;Double y = lat - 0.006;coord Pos;Pos.lon = x;Pos.lat = y;coord tempPoint = GCJ02ToBD09(Pos);Double dx = tempPoint.lon - lon;Double dy = tempPoint.lat - lat;while (Math.Abs(dx) > 1e-14 || Math.Abs(dy) > 1e-14)//回归{Pos.lon -= dx;Pos.lat -= dy;tempPoint = GCJ02ToBD09(Pos);dx = tempPoint.lon - lon;dy = tempPoint.lat - lat;}return Pos;}

5、坐标公共转换类

        /// <summary>长半轴</summary>public const Double a = 6378245.0;/// <summary>第一偏心率</summary>public const Double ee = 0.00669342162296594322796213968775;/// <summary>百度坐标转换因子</summary>public const Double baiduFactor = (Math.PI * 3000.0) / 180.0;// 定义坐标结构体public struct coord{public Double lon;public Double lat;};/// <summary>是否中国坐标</summary>/// <param name="lon">经度</param>/// <param name="lat">纬度</param>/// <returns>返回布尔值</returns>public Boolean isInChina(Double lon, Double lat){return lon >= 72.004 && lon <= 137.8347 && lat >= 0.8293 && lat <= 55.8271;}/// <summary>偏移量</summary>/// <param name="lon">经度</param>/// <param name="lat">纬度</param>/// <returns></returns>public coord offset(Double lon, Double lat){Double dLon = transformLon(lon - 105.0, lat - 35.0);Double dLat = transformLat(lon - 105.0, lat - 35.0);Double radLat = (lat / 180.0) * Math.PI;Double magic = Math.Sin(radLat);magic = 1 - ee * magic * magic;Double sqrtMagic = Math.Sqrt(magic);coord outPos;outPos.lon = (dLon * 180.0) / (a / sqrtMagic * Math.Cos(radLat) * Math.PI);outPos.lat = (dLat * 180.0) / ((a * (1 - ee)) / (magic * sqrtMagic) * Math.PI);return outPos;}/// <summary>纬度偏移量</summary>/// <param name="lon">经度</param>/// <param name="lat">纬度</param>/// <returns>返回纬度</returns>public Double transformLat(Double lon, Double lat){Double ret = -100.0 + 2.0 * lon + 3.0 * lat + 0.2 * lat * lat + 0.1 * lon * lat + 0.2 * Math.Sqrt(Math.Abs(lon));ret += ((20.0 * Math.Sin(6.0 * lon * Math.PI) + 20.0 * Math.Sin(2.0 * lon * Math.PI)) * 2.0) / 3.0;ret += ((20.0 * Math.Sin(lat * Math.PI) + 40.0 * Math.Sin((lat / 3.0) * Math.PI)) * 2.0) / 3.0;ret += ((160.0 * Math.Sin((lat / 12.0) * Math.PI) + 320.0 * Math.Sin((lat * Math.PI) / 30.0)) * 2.0) / 3.0;return ret;}/// <summary>经度偏移量</summary>/// <param name="lon">经度</param>/// <param name="lat">纬度</param>/// <returns>返回经度</returns>public Double transformLon(Double lon, Double lat){Double ret = 300.0 + lon + 2.0 * lat + 0.1 * lon * lon + 0.1 * lon * lat + 0.1 * Math.Sqrt(Math.Abs(lon));ret += ((20.0 * Math.Sin(6.0 * lon * Math.PI) + 20.0 * Math.Sin(2.0 * lon * Math.PI)) * 2.0) / 3.0;ret += ((20.0 * Math.Sin(lon * Math.PI) + 40.0 * Math.Sin((lon / 3.0) * Math.PI)) * 2.0) / 3.0;ret += ((150.0 * Math.Sin((lon / 12.0) * Math.PI) + 300.0 * Math.Sin((lon / 30.0) * Math.PI)) * 2.0) / 3.0;return ret;}

6、地图显示

        /// <summary>坐标值改变，地图改变</summary>private void ChangeVal(){Double longitude = 0;Double latitude = 0;switch (comboBox1.SelectedIndex){case 0://高德if (string.IsNullOrEmpty(textBox3.Text) || string.IsNullOrEmpty(textBox4.Text)){longitude = 112.960235035495;latitude = 28.1661659723607;}else{longitude = Convert.ToDouble(textBox4.Text);latitude = Convert.ToDouble(textBox3.Text);}//string amapUrl = "http://ditu.amap.com/?longitude=" + longitude + "&latitude=" + latitude;string amapUrl = "http://ditu.amap.com";// "http://map.gaode.com/";webBrowser1.Navigate(amapUrl);break;case 1://百度if (string.IsNullOrEmpty(textBox5.Text) || string.IsNullOrEmpty(textBox6.Text)){longitude = 112.966759165825;latitude = 28.1719881916543;}else{longitude = Convert.ToDouble(textBox6.Text);latitude = Convert.ToDouble(textBox5.Text);}//string url = "http://map.baidu.com/";string url = "http://api.map.baidu.com/marker?location=" + latitude + "," + longitude + "&title=&content=我在这里&output=html";webBrowser1.Navigate(url);break;case 2://腾讯if (string.IsNullOrEmpty(textBox3.Text) || string.IsNullOrEmpty(textBox4.Text)){longitude = 112.960235035495;latitude = 28.1661659723607;}else{longitude = Convert.ToDouble(textBox4.Text);latitude = Convert.ToDouble(textBox3.Text);}// string qqMapUrl= "http://map.qq.com/?referer=ts.qq.com&type=ms&lat=" + latitude + "&lng=" +longitude;string qqMapUrl = "http://map.qq.com/";webBrowser1.Navigate(qqMapUrl);break;}}

7、程序简单界面

8、完整源代码工程

CSDN 资源下载地址：

https://download.csdn.net/download/zyyujq/89823267