C# 使用Google API进行手机基站定位资料整理

C# 使用Google API进行手机基站定位资料整理

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;
}
string shortCID = ""; /* Default, no change at all */
if (args.Length == 5)
shortCID = args[4].ToLower();
try
{
String url = "http://www.google.com/glm/mmap";
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(
new Uri(url));
req.Method = "POST";

int MCC = Convert.ToInt32(args[0]);
int MNC = Convert.ToInt32(args[1]);
int LAC = Convert.ToInt32(args[2]);
int CID = Convert.ToInt32(args[3]);
byte[] pd = PostData(MCC, MNC, LAC, CID,
shortCID == "shortcid");

req.ContentLength = pd.Length;
req.ContentType = "application/binary";
Stream outputStream = req.GetRequestStream();
outputStream.Write(pd, 0, pd.Length);
outputStream.Close();

HttpWebResponse res = (HttpWebResponse)req.GetResponse();
byte[] ps = new byte[res.ContentLength];
int totalBytesRead = 0;
while (totalBytesRead < ps.Length)
{
totalBytesRead += res.GetResponseStream().Read(
ps, totalBytesRead, ps.Length - totalBytesRead);
}

if (res.StatusCode == HttpStatusCode.OK)
{
short opcode1 = (short)(ps[0] << 8 | ps[1]);
byte opcode2 = ps[2];
int ret_code = (int)((ps[3] << 24) | (ps[4] << 16) |
(ps[5] << 8) | (ps[6]));
if (ret_code == 0)
{
double lat = ((double)((ps[7] << 24) | (ps[8] << 16)
| (ps[9] << 8) | (ps[10]))) / 1000000;
double lon = ((double)((ps[11] << 24) | (ps[12] <<
16) | (ps[13] << 8) | (ps[14]))) /
1000000;
return lat + "|" + lon;
}
else
return string.Empty;
}
else
return string.Empty;
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
return string.Empty;
}
}

}

下面在介绍一种只要知道cellid和lac两个参数就可以获取经纬度的方法：

1 /// <summary>
2 /// 判断是否正确获取经纬度信息
3 /// </summary>
4 /// <param name="cellid">cellid</param>
5 /// <param name="lac">LocationAreaCode</param>
6 /// <param name="Lat">latitude</param>
7 /// <param name="Lng">longgitude</param>
8 /// <returns></returns>
9 public static bool LocateGooleMapApi(uint cellid, uint lac, out double Lat, out double Lng)
10 {
11 HttpWebRequest request =(HttpWebRequest)WebRequest.Create("http://www.google.com/glm/mmap");
12 request.Method = "POST";
13
14
15 byte[] byteArray = {0x00,0x15,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x02,
16 0x65, 0x6E, // en
17 0x00, 0x07,
18 0x41, 0x6E, 0x64, 0x72, 0x6F, 0x69, 0x64,
19 0x00, 0x03,
20 0x31, 0x2E, 0x30, // 1.0
21 0x00, 0x03,
22 0x57, 0x65, 0x62, // web
23 0x1B,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
24 0x00,0x00,0x00,0x00,0x03,0x00,0x00,
25 0xFF, 0xFF, 0xFF, 0xFF, // CellID
26 0xFF, 0xFF, 0xFF, 0xFF, // LAC
27 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
28 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 };
29
30 // write CellID
31 byte[] intByte = BitConverter.GetBytes(cellid);
32 byteArray[48] = intByte[3];
33 byteArray[49] = intByte[2];
34 byteArray[50] = intByte[1];
35 byteArray[51] = intByte[0];
36
37 // write LAC
38 intByte = BitConverter.GetBytes(lac);
39 byteArray[52] = intByte[3];
40 byteArray[53] = intByte[2];
41 byteArray[54] = intByte[1];
42 byteArray[55] = intByte[0];
43
44 // set request
45 request.ContentLength = byteArray.Length;
46 Stream postStream = request.GetRequestStream();
47 postStream.Write(byteArray, 0, byteArray.Length);
48 postStream.Close();
49
50 // Get the response.
51 HttpWebResponse response = (HttpWebResponse)request.GetResponse();
52 Console.WriteLine("[I] Request response: {0}", response.StatusDescription);
53
54 // Read response
55 Stream dataStream = response.GetResponseStream();
56 BinaryReader BR = new BinaryReader(dataStream);
57 // skip 3 byte
58 BR.ReadByte();
59 BR.ReadByte();
60 BR.ReadByte();
61
62 // check state
63 if (0 == BR.ReadInt32())
64 {
65 // read lat
66 byte[] tmpByte = new byte[4];
67 tmpByte[3] = BR.ReadByte();
68 tmpByte[2] = BR.ReadByte();
69 tmpByte[1] = BR.ReadByte();
70 tmpByte[0] = BR.ReadByte();
71 Lat = (double)(BitConverter.ToInt32(tmpByte, 0)) / 1000000D;
72
73 // read lng
74 tmpByte[3] = BR.ReadByte();
75 tmpByte[2] = BR.ReadByte();
76 tmpByte[1] = BR.ReadByte();
77 tmpByte[0] = BR.ReadByte();
78 Lng = (double)(BitConverter.ToInt32(tmpByte, 0)) / 1000000D;
79
80 BR.Close();
81 dataStream.Close();
82 response.Close();
83 return true;
84 }
85 else
86 {
87 BR.Close();
88 dataStream.Close();
89 response.Close();
90 Lat = 0;
91 Lng = 0;
92 return false;
93 }
94
95
96 }

最后只要用C#2008 建立一个新项目，添加webbrowser控件，添加一个按键代码如下：

1 Cursor.Current = Cursors.WaitCursor;
2 string [] cellidFields = RIL.GetCellTowerInfo().ToString().Split('-');
3
4 string[] args ={
5 cellidFields[2],
6 "0",
7 cellidFields[1],
8 cellidFields[0]
9 };
10 string[] latlng = GMM.GetLatLng(args).Split('|');
11
12 Uri url = new Uri("http://maps.google.com/staticmap?&maptype=satellite&key=xxx&markers=" + latlng[0].ToString().Replace(',', '.') + "," + latlng[1].ToString().Replace(',', '.') + "¢er=,&size=240x320&zoom=18");
13 webBrowser1.Navigate(url);
14 Cursor.Current = Cursors.Default;

就只有这些了，如果谁有更好的利用GOOGLE 进行手机基站定位，精度较高的方法，请告诉我，本人不胜感激啊！