google地图经纬度查询代码

1:  // Taipei 101

   2:  string address = "台北市信義路五段七號101樓";

   3:   

   4:  // 查詢經緯度

   5:  string output = "csv";

   6:  string key = "ABQIAAAAXDq__hWKi9eMCwnn7LrMCxT2yXp_ZAY8_ufC3CFXhHIE1NvwkxSnSVp_Xlsd4Ph5iyMua7PE5E0x_A";

   7:  string url = string.Format("http://maps.google.com/maps/geo?q={0}&output={1}&key={2}", address, output, key);

   8:   

   9:  WebClient wc = new WebClient();

  10:   

  11:  // 讀取結果

  12:  Stream s = wc.OpenRead(url);

  13:  StreamReader sr = new StreamReader(s, Encoding.UTF8);

  14:  string result = sr.ReadToEnd();

  15:   

  16:  // 解析 200,8,25.033408,121.564099  (HTTP status code, accuracy, latitude, longitude)

  17:  string[] tmpArray = result.Split(',');

  18:  string latitude = tmpArray[2];

  19:  string longitude = tmpArray[3];

  20:   

  21:  MessageBox.Show(string.Format("緯度: {0}, 經度: {1}", latitude, longitude), address, 

  22:  MessageBoxButtons.OK, MessageBoxIcon.Information);

使用 HttpWebRequest、HttpWebResponse 類別:

// Taipei 101
string address = "台北市信義路五段七號101樓";

// 查詢經緯度
string output = "csv";
string key = "ABQIAAAAXDq__hWKi9eMCwnn7LrMCxT2yXp_ZAY8_ufC3CFXhHIE1NvwkxSnSVp_Xlsd4Ph5iyMua7PE5E0x_A";
string url = string.Format("http://maps.google.com/maps/geo?q={0}&output={1}&key={2}", address, output, key);

// 送出要求
HttpWebRequest request = (HttpWebRequest) WebRequest.Create(url);

// 取得回應
HttpWebResponse response = (HttpWebResponse) request.GetResponse();

// 讀取結果
StreamReader sr = new StreamReader(response.GetResponseStream());

// 解析 200,8,25.033408,121.564099  (HTTP status code, accuracy, latitude, longitude)
string[] tmpArray = sr.ReadToEnd().Split(',');
string latitude = tmpArray[2];
string longitude = tmpArray[3];

MessageBox.Show(string.Format("緯度: {0}, 經度: {1}", latitude, longitude), address,
    MessageBoxButtons.OK, MessageBoxIcon.Information);

如果代码查询的蛮足不了你的要求，可以去这里看看

http://www.playgoogle.com/googlemap/tool1.html