private static HashBox DecodeBox(string hash)
{
var isLongitude = true;
var min = new GeoCoordinate(-90, -180);
var max = new GeoCoordinate(90, 180);
var shifts = new List <int>()
{
4, 3, 2, 1, 0
};
hash.ToList().ForEach(c =>
{
shifts.ForEach(shift =>
{
var coordinate = ((Base32Codes[c] >> shift) & 1) == 1 ? min : max;
if (isLongitude)
{
coordinate.Longitude = (max.Longitude + min.Longitude) / 2;
}
else
{
coordinate.Latitude = (max.Latitude + min.Latitude) / 2;
}
isLongitude = !isLongitude;
});
Log.Debug($"char: {c} min: {min.PrettyPrint()} max: {max.PrettyPrint()}");
});
return(new HashBox(min, max));
}
public static GeoCoordinate Convert(string locator)
{
if (locator is null)
{
throw new ArgumentNullException(nameof(locator));
}
if (!IsValid(locator))
{
throw new ArgumentException(nameof(locator));
}
var c = new GeoCoordinate(-90, -180);
var divisor = 1d;
var cnt = 0;
foreach (var pair in Split(locator.ToUpperInvariant()))
{
cnt++;
var isLetter = true;
if (cnt == 1)
{
divisor *= 18;
}
else if (cnt % 2 == 0)
{
divisor *= 10;
isLetter = false;
}
else
{
divisor *= 24;
}
int longValue = pair[0] - (isLetter ? 'A' : '0');
int latValue = pair[1] - (isLetter ? 'A' : '0');
var longPart = (360d * longValue) / divisor;
var latPart = (180d * latValue) / divisor;
c.Longitude += longPart;
c.Latitude += latPart;
Log.Debug($"{pair[0]} (long): {longValue}*360/{divisor} = {longValue}*{360 / divisor} = {longPart}°");
Log.Debug($"{pair[1]} (lat): {latValue}*180/{divisor} = {latValue}*{180 / divisor} = {latPart}°");
Log.Debug($"--> {c}");
Log.Debug($"--> {c.PrettyPrint()}");
}
return(c);
}
