Reverse GEO lookup in C#

Published Nov 19, 2008

Google’s maps API now supports reversed GEO lookup which allows you to find an address based on geo coordinates. All you need is a latitude, a longitude and this handy method:

 private const string endPoint = "http://maps.google.com/maps/geo?q={0},{1}&output=xml&sensor=true&key=YOURKEY"; 
   
 private static string GetAddress(double latitude, double longitude) 
 { 
   string lat = latitude.ToString(CultureInfo.InvariantCulture); 
   string lon = longitude.ToString(CultureInfo.InvariantCulture); 
   string url = string.Format(endPoint, lat, lon); 
   
   using (WebClient client = new WebClient()) 
   { 
     string xml = client.DownloadString(url); 
     XmlDocument doc = new XmlDocument(); 
     doc.LoadXml(xml); 
   
     XmlNode node = doc.ChildNodes[1].FirstChild.ChildNodes[2].ChildNodes[0]; 
     return node.InnerText; 
   } 
 } 

It returns the address as a string.

Comments