GPS经纬度值 转换成 区域

开始准备用百度API，要什么秘钥，太麻烦了，找了个GOOGLE的

如下网址内容可参考
http://www.cnblogs.com/liuhaorain/archive/2012/01/31/2334018.html
这里有PC和PDA平台2中：

PC下转换：

//webclient客户端对象

WebClient client = new WebClient();

string url = "http://maps.google.com/maps/api/geocode/xml?latlng=" + latitude + "," + longitude + "&language=zh-CN&sensor=false";//请求地址

client.Encoding = Encoding.UTF8;//编码格式

string responseTest = client.DownloadString(url);

//下载xml响应数据

string address = "";//返回的地址

XmlDocument doc = new XmlDocument();

//创建XML文档对象

if (!string.IsNullOrEmpty(responseTest))

{

doc.LoadXml(responseTest);//加载xml字符串

//查询状态信息

string xpath = @"GeocodeResponse/status";

XmlNode node = doc.SelectSingleNode(xpath);

string status = node.InnerText.ToString();

if (status == "OK") {

//查询详细地址信息

xpath = @"GeocodeResponse/result/formatted_address";

node = doc.SelectSingleNode(xpath);

address = node.InnerText.ToString();

//查询地区信息

XmlNodeList nodeListAll = doc.SelectNodes("GeocodeResponse/result");

XmlNode idt = nodeListAll[0];

XmlNodeList idts = idt.SelectNodes("address_component[type='sublocality']");

//address_component[type='sublocality']表示筛选type='sublocality'的所有相关子节点；

XmlNode idtst = idts[0];

string area = idtst.SelectSingleNode("short_name").InnerText;

address = address + "," + area;

}

}

PDA下：

void Getarea( string longitude,string latitude)

{

////webclient客户端对象

//WebClient client = new WebClient();

//string url = "http://maps.google.com/maps/api/geocode/xml?latlng=" + latitude + "," + longitude + "&language=zh-CN&sensor=false";//请求地址

//client.Encoding = Encoding.UTF8;//编码格式

string url = "http://maps.google.com/maps/api/geocode/xml?latlng=" + latitude + "," + longitude + "&language=zh-CN&sensor=false";//请求地址

//string responseTest = client.DownloadString(url);

string responseTest = GetData(url);

//下载xml响应数据

string address = "";//返回的地址

XmlDocument doc = new XmlDocument();

//创建XML文档对象

if (!string.IsNullOrEmpty(responseTest))

{

doc.LoadXml(responseTest);//加载xml字符串

//查询状态信息

string xpath = @"GeocodeResponse/status";

XmlNode node = doc.SelectSingleNode(xpath);

string status = node.InnerText.ToString();

if (status == "OK")

{

//查询详细地址信息

xpath = @"GeocodeResponse/result/formatted_address";

node = doc.SelectSingleNode(xpath);

address = node.InnerText.ToString();

//查询地区信息

XmlNodeList nodeListAll = doc.SelectNodes("GeocodeResponse/result");

XmlNode idt = nodeListAll[0];

XmlNodeList idts = idt.SelectNodes("address_component[type='sublocality']");

//address_component[type='sublocality']表示筛选type='sublocality'的所有相关子节点；

XmlNode idtst = idts[0];

string area = idtst.SelectSingleNode("short_name").InnerText;

label4.Text = address + "," + area;

//address = address + "," + area;

Addtxt(address + "," + area);

}

}

}

string GetData(string url)

{

try

{

HttpWebRequest myRequst = (HttpWebRequest)WebRequest.Create(url);

myRequst.Method = "GET";

myRequst.ContentType = "text/html;charset=UTF-8";

HttpWebResponse response = (HttpWebResponse)myRequst.GetResponse();

Stream myResponseStream = response.GetResponseStream();

StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("UTF-8"));

string retString = myStreamReader.ReadToEnd();

myStreamReader.Close();

return retString;

}

catch (System.Exception ex)

{

return string.Empty;

}

}