public static double convertToDistance(Listing a, Listing b)
{
double theDistance = (Math.Sin(DegreesToRadians(Convert.ToDouble(a.Lat))) *
Math.Sin(DegreesToRadians(Convert.ToDouble(b.Lat))) +
Math.Cos(DegreesToRadians(Convert.ToDouble(a.Lat))) * //Haversine formula
Math.Cos(DegreesToRadians(Convert.ToDouble(b.Lat))) *
Math.Cos(DegreesToRadians(Convert.ToDouble(a.Lng - b.Lng))));
return Convert.ToDouble((RadiansToDegrees(Math.Acos(theDistance)))) * 69.09 * 1.6093; // the distance unit is 69.09 wich returns distance in miles.. there are 1.6 kilometers in a mile. so return is in km.
}
public static void getCoordinates(Listing listing)
{
System.Threading.Thread.Sleep(250);
decimal[] geoCode = new decimal[2] { 0, 0 };
string address = "http://maps.googleapis.com/maps/api/geocode/xml?address=" + listing.AddressForURL + "&sensor=false";
var result = new System.Net.WebClient().DownloadString(address);
XmlDocument doc = new XmlDocument();
doc.LoadXml(result);
string status = doc.DocumentElement.SelectSingleNode("/GeocodeResponse/status").InnerText;
XmlNodeList parentNode = doc.GetElementsByTagName("location");
if (status== "OK")
{
foreach (XmlNode childrenNode in parentNode)
{
geoCode[0] = Convert.ToDecimal(childrenNode.SelectSingleNode("lat").InnerText, new CultureInfo("en-US"));
geoCode[1] = Convert.ToDecimal(childrenNode.SelectSingleNode("lng").InnerText, new CultureInfo("en-US"));
}
listing.GetGeoCode(geoCode);
}
else if (status == "ZERO_RESULTS")
{
//kast exception der fortæller at addressen ikke findes og/eller er stavet forkert.
Console.WriteLine("Addressen findes ikke og/eller er stavet forkert.");
Console.ReadKey();
}
else if (status == "OVER_QUERY_LIMIT")
{
//Kast exception der fortæller at de har opbrugt kvote af lookups.
Console.WriteLine("Kvote af lookups er brugt op");
Console.ReadKey();
}
else
{
Console.WriteLine(status);
Console.ReadKey();
}
}