C#使用GoogleAPI进行手机基站定位资料整理

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在网上收集了一部分关于使用Google API进行手机定位的资料和大家分享：

关于基站定位方面的介绍：

http://tech.c114.net/164/a140837.html

开发方面的帮助：

http://www.dotblogs.com.tw/kylin/archive/2009/08/09/9964.aspx

http://code.google.com/intl/zh-CN/apis/maps/documentation/staticmaps/

http://www.codeproject.com/KB/mobile/DeepCast.aspx

http://heresy.spaces.live.com/blog/cns!E0070FB8ECF9015F!7866.entry?wa=wsignin1.0&sa=334916734

以上方法的流程一般如下：

通过RIL获取CellTowerInfo----->通过google api获取经纬度------->转换成54或是地方坐标后在地图上显示位置

本人整理了代码进行了测试，效果不是很好，使用的多普达S700，windows mobile 专业版 6.1 ，地点在上海，

定位结果如下

CELLID=1346
LAC=43060
MCC=460
MNC=0

从google获取的坐标31.109，121.368,定位位置到了莘西路上

经过计算与实际位置直线距离在8KM左右

而通过Google Maps在手机上测试当前位置提示精度为18000m，呵呵，这个精度恐怕只能确定在那个城市了，个人认为：原因可能有以下几点：

1.周围基站分布较少或是真的很远，上海的移动2G基站每年的数量都在减少，有时在公司的时候都会出现盲区，信号不是很好

2.直接通过cellid，lac，mcc，mnc等信息在Google上获取的经纬度没有经过误差分析，没有太大的精度可言

3.绕开中国移动运营商进行手机基站定位比较难，人家要靠这个赚钱的，当然也牵涉到国家安全，呵呵

4.RIL相关函数严格来说在Windows Mobile 上面都不是必须被实现的

下面是我的代码和注释，有些地方还是不能理解：

  1    public class RIL
  2     {
  3         //CellTower信息
  4         private static string celltowerinfo = "";
  5
  6         //通过RIL获取CellID
  7         public static string GetCellTowerInfo()
  8         {
  9             //初始化句柄
10             IntPtr hRil = IntPtr.Zero;
11             IntPtr hRes = IntPtr.Zero;
12
13             //初始化结果变量
14             celltowerinfo = "";
15
16             //为一个Client初始化RIL
17             hRes = RIL_Initialize(1,
18                                new RILRESULTCALLBACK(rilResultCallBack),
19                                null,
20                                0,
21                                0,
22                                out hRil);
23
24             if (hRes != IntPtr.Zero)
25             {
26                 return "不能初始化RIL";
27             }
28
29             //获取当前Phone使用的基站信息
30             hRes = RIL_GetCellTowerInfo(hRil);
31
32             waithandle.WaitOne();
33
34             //解除RIL
35             RIL_Deinitialize(hRil);
36
37             return celltowerinfo;
38
39
40         }
41
42         private static AutoResetEvent waithandle = new AutoResetEvent(false);
43
44         public static void rilResultCallBack(uint dwCode,
45                                              IntPtr hrCmdID,
46                                              IntPtr lpData,
47                                              uint cdData,
48                                              uint dwParam)
49         {
50             RILCELLTOWERINFO rilCellTowerInfo = new RILCELLTOWERINFO();
51
52             //将数据lpData从非托管内存块封送到rilCellTowerInfo托管对象中
53             Marshal.PtrToStructure(lpData, rilCellTowerInfo);
54
55             celltowerinfo = rilCellTowerInfo.dwCellID + "-" + rilCellTowerInfo.dwLocationAreaCode + "-" +
56                             rilCellTowerInfo.dwMobileCountryCode+"-"+rilCellTowerInfo.dwMobileNetworkCode;
57
58             //将事件状态设置为终止状态，允许一个或多个等待线程继续
59             waithandle.Set();
60         }
61
62         public delegate void RILRESULTCALLBACK(uint dwCode,IntPtr hrCmdID,IntPtr lpData,uint cbData,uint dwParam);
63
64         public delegate void RILNOTIFYCALLBACK(uint dwCode,IntPtr lpData,uint cbData,uint dwParam);
65
66         //RIL基站信息类
67         public class RILCELLTOWERINFO
68         {
69                public uint cbSize;
70                public uint dwParams;
71                public uint dwMobileCountryCode;
72                public uint dwMobileNetworkCode;
73                public uint dwLocationAreaCode;
74                public uint dwCellID;
75                public uint dwBaseStationID;
76                public uint dwBroadcastControlChannel;
77                public uint dwRxLevel;
78                public uint dwRxLevelFull;
79                public uint dwRxLevelSub;
80                public uint dwRxQuality;
81                public uint dwRxQualityFull;
82                public uint dwRxQualitySub;
83                public uint dwIdleTimeSlot;
84                public uint dwTimingAdvance;
85                public uint dwGPRSCellID;
86                public uint dwGPRSBaseStationID;
87                public uint dwNumBCCH;
88
89
90         }
91
92         /* 调用API
93          * 初始化RIL
94          * MSDN:   http://msdn.microsoft.com/zh-cn/library/aa919106(en-us).aspx */
95         [DllImport("ril.dll")]
96         private static extern IntPtr RIL_Initialize(uint dwIndex, RILRESULTCALLBACK pfnResult, RILNOTIFYCALLBACK pfnNotify, uint dwNotificationClasses, uint dwParam, out IntPtr lphRil);
97         [DllImport("ril.dll")]
98         private static extern IntPtr RIL_GetCellTowerInfo(IntPtr hRil);
99         [DllImport("ril.dll")]
100         private static extern IntPtr RIL_Deinitialize(IntPtr hRil);
101
102     }

之后是有关通信方面的，通过基站信息获取经纬度（GOOGLE API）

代码

  public class GMM
    {
          static byte[] PostData(int MCC, int MNC, int LAC, int CID,
                               bool shortCID)
      {

            byte[] pd = new byte[]{
                0x00, 0x0e,
                0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                0x00, 0x00,
                0x00, 0x00,
                0x00, 0x00,

                0x1b,
                0x00, 0x00, 0x00, 0x00, // Offset 0x11
                0x00, 0x00, 0x00, 0x00, // Offset 0x15
                0x00, 0x00, 0x00, 0x00, // Offset 0x19
                0x00, 0x00,
                0x00, 0x00, 0x00, 0x00, // Offset 0x1f
                0x00, 0x00, 0x00, 0x00, // Offset 0x23
                0x00, 0x00, 0x00, 0x00, // Offset 0x27
                0x00, 0x00, 0x00, 0x00, // Offset 0x2b
                0xff, 0xff, 0xff, 0xff,
                0x00, 0x00, 0x00, 0x00
            };

            bool isUMTSCell = ((Int64)CID > 65535);

            if (isUMTSCell)
                Console.WriteLine("UMTS CID.{0}", shortCID ?
                 "Using short CID to resolve." : "");
            else
                Console.WriteLine("GSM CID given.");

            if (shortCID)
                CID &= 0xFFFF;      /* Attempt to resolve the cell using the

            if ((Int64)CID > 65536) /* GSM: 4 hex digits, UTMS: 6 hex
                                    digits */
            if ((Int64)CID > 65536)
                pd[0x1c] = 5;
            else
                pd[0x1c] = 3;

            pd[0x11] = (byte)((MNC >> 24) & 0xFF);
            pd[0x12] = (byte)((MNC >> 16) & 0xFF);
            pd[0x13] = (byte)((MNC >> 8) & 0xFF);
            pd[0x14] = (byte)((MNC >> 0) & 0xFF);

            pd[0x15] = (byte)((MCC >> 24) & 0xFF);
            pd[0x16] = (byte)((MCC >> 16) & 0xFF);
            pd[0x17] = (byte)((MCC >> 8) & 0xFF);
            pd[0x18] = (byte)((MCC >> 0) & 0xFF);

            pd[0x27] = (byte)((MNC >> 24) & 0xFF);
            pd[0x28] = (byte)((MNC >> 16) & 0xFF);
            pd[0x29] = (byte)((MNC >> 8) & 0xFF);
            pd[0x2a] = (byte)((MNC >> 0) & 0xFF);

            pd[0x2b] = (byte)((MCC >> 24) & 0xFF);
            pd[0x2c] = (byte)((MCC >> 16) & 0xFF);
            pd[0x2d] = (byte)((MCC >> 8) & 0xFF);
            pd[0x2e] = (byte)((MCC >> 0) & 0xFF);

            pd[0x1f] = (byte)((CID >> 24) & 0xFF);
            pd[0x20] = (byte)((CID >> 16) & 0xFF);
            pd[0x21] = (byte)((CID >> 8) & 0xFF);
            pd[0x22] = (byte)((CID >> 0) & 0xFF);

            pd[0x23] = (byte)((LAC >> 24) & 0xFF);
            pd[0x24] = (byte)((LAC >> 16) & 0xFF);
            pd[0x25] = (byte)((LAC >> 8) & 0xFF);
            pd[0x26] = (byte)((LAC >> 0) & 0xFF);

            return pd;
        }
                                    //GSM CID part */

       /// <summary>
       /// 通过基站信息获取经纬度
       /// </summary>
       /// <param name="args"></param>
       /// <returns></returns>
        static public string GetLatLng(string[] args)
       {
            if (args.Length < 4)
            {
                return string.Empty;
            }