关键代码：

using System;using System.Collections;using System.Collections.Generic;using System.IO;using YanZhiwei.DotNet2.Utilities.Models;namespace YanZhiwei.DotNet2.Utilities.Common{    /// <summary>    /// 地图纠偏数据帮助类    /// </summary>    public class MapOffsetDataHelper    {        #region 构造函数以及变量        private string offsetFullPath = string.Empty;        /// <summary>        /// 构造函数        /// </summary>        /// <param name="path">纠偏数据文件路径</param>        public MapOffsetDataHelper(string path)        {            offsetFullPath = path;        }        #endregion        #region 私有方法        private void GetOffsetData(Action<MapCoord> mapCoordHanlder)        {            using (FileStream stream = new FileStream(offsetFullPath, FileMode.OpenOrCreate, FileAccess.Read))            {                using (BinaryReader reader = new BinaryReader(stream))                {                    int _size = (int)stream.Length / 8;                    for (int i = 0; i < _size; i++)                    {                        byte[] _source = reader.ReadBytes(8);                        MapCoord _coord = ToCoord(_source);                        mapCoordHanlder(_coord);                    }                }            }        }        /// <summary>        /// 将字节转化为具体的数据对象        /// </summary>        /// <param name="bytes">bytes</param>        /// <returns>MapCoord</returns>        private MapCoord ToCoord(byte[] bytes)        {            //经度,纬度,x偏移量,y偏移量 【均两个字节】            MapCoord _coord = new MapCoord();            byte[] _b1 = new byte[2], _b2 = new byte[2], _b3 = new byte[2], _b4 = new byte[2];            Array.Copy(bytes, 0, _b1, 0, 2);            Array.Copy(bytes, 2, _b2, 0, 2);            Array.Copy(bytes, 4, _b3, 0, 2);            Array.Copy(bytes, 6, _b4, 0, 2);            _coord.Lon = BitConverter.ToInt16(_b1, 0);            _coord.Lat = BitConverter.ToInt16(_b2, 0);            _coord.X_off = BitConverter.ToInt16(_b3, 0);            _coord.Y_off = BitConverter.ToInt16(_b4, 0);            return _coord;        }        #endregion         #region 获取纠偏数据集合        /// <summary>        /// 获取纠偏数据集合        /// </summary>        /// <returns>纠偏数据集合</returns>        public List<MapCoord> GetMapCoordList()        {            List<MapCoord> _mapCoordList = new List<MapCoord>();            GetOffsetData(c => _mapCoordList.Add(c));            return _mapCoordList;        }        /// <summary>        /// 获取纠偏数据集合        /// </summary>        /// <returns>纠偏数据集合</returns>        public ArrayList GetMapCoordArrayList()        {            ArrayList _mapCoordArrayList = new ArrayList();            GetOffsetData(c => _mapCoordArrayList.Add(c));            return _mapCoordArrayList;        }        #endregion    }}

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using System.Collections;using YanZhiwei.DotNet2.Utilities.Models;using YanZhiwei.DotNet2.Utilities.Tool;namespace YanZhiwei.DotNet2.Utilities.Common{    /// <summary>    /// 地图纠偏 帮助类    /// </summary>    public class MapOffsetHelper    {        /*         *参考：         *1.http://www.apkbus.com/forum.php?mod=viewthread&tid=137621&extra=page%3D1&page=1         *2.http://yanue.net/post-122.html         *3.http://go2log.com/2011/08/30/%E4%B8%AD%E5%9B%BD%E5%9C%B0%E5%9B%BE%E5%81%8F%E7%A7%BB%E6%A0%A1%E6%AD%A3php%E7%AE%97%E6%B3%95/         *4.http://www.devdiv.com/ios_gps_google_-blog-60266-10835.html         */        #region 构造函数以及变量        private ArrayList mapCoordArrayList;        /// <summary>        /// 构造函数        /// </summary>        /// <param name="offsetData">纠偏数据</param>        public MapOffsetHelper(ArrayList offsetData)        {            mapCoordArrayList = offsetData;        }        #endregion        #region 私有方法        private MapCoord QueryOffSetData(LatLngPoint point)        {            MapCoord _search = new MapCoord();            _search.Lat = (int)(point.LatY * 100);            _search.Lon = (int)(point.LonX * 100);            MapOffsetComparer rc = new MapOffsetComparer();            int _findedIndex = mapCoordArrayList.BinarySearch(0, mapCoordArrayList.Count, _search, rc);            MapCoord _findedCoord = (MapCoord)mapCoordArrayList[_findedIndex];            return _findedCoord;        }        #endregion         #region 地球坐标(WGS-84)转火星坐标 (GCJ-02)        /// <summary>        /// 地球坐标(WGS-84)转火星坐标 (GCJ-02)        /// </summary>        /// <param name="wgsPoint">地球坐标(WGS-84)</param>        /// <returns>火星坐标 (GCJ-02)</returns>        public LatLngPoint WGS84ToGCJ02(LatLngPoint wgsPoint)        {            MapCoord _findedCoord = QueryOffSetData(wgsPoint);            double _pixY = MapHelper.LatToPixel(wgsPoint.LatY, 18);            double _pixX = MapHelper.LonToPixel(wgsPoint.LonX, 18);            _pixY += _findedCoord.Y_off;            _pixX += _findedCoord.X_off;            double _lat = MapHelper.PixelToLat(_pixY, 18);            double _lng = MapHelper.PixelToLon(_pixX, 18);            return new LatLngPoint(_lat, _lng);        }        #endregion        #region 火星坐标转 (GCJ-02)地球坐标(WGS-84)        /// <summary>        /// 火星坐标转 (GCJ-02)地球坐标(WGS-84)        /// </summary>        /// <param name="gcjPoint">火星坐标转 (GCJ-02)</param>        /// <returns>地球坐标(WGS-84)</returns>        public LatLngPoint GCJ02ToWGS84(LatLngPoint gcjPoint)        {            MapCoord _findedCoord = QueryOffSetData(gcjPoint);            double _pixY = MapHelper.LatToPixel(gcjPoint.LatY, 18);            double _pixX = MapHelper.LonToPixel(gcjPoint.LonX, 18);            _pixY -= _findedCoord.Y_off;            _pixX -= _findedCoord.X_off;            double _lat = MapHelper.PixelToLat(_pixY, 18);            double _lng = MapHelper.PixelToLon(_pixX, 18);            return new LatLngPoint(_lat, _lng);        }        #endregion    }}

[C#]利用纠偏数据来处理地球坐标(WGS-84)与火星坐标 (GCJ-02)转换