public static Tuple <StandardChunkMetadata, bool> Parse(string x)
{
var parts = x.Split('.');
var split1 = Math.Max(x.IndexOf('n'), x.IndexOf('s'));
var split2 = Math.Max(x.IndexOf('w'), x.IndexOf('e'));
var lat = Angle.Parse(x.Substring(0, split1 + 1));
var lon = Angle.Parse(x.Substring(split1 + 1, split2 - split1));
var zoom = int.Parse(parts[0].Substring(split2 + 1));
bool isImage = (parts[2][0] == 'i');
var template = StandardChunkMetadata.GetRangeContaingPoint(lat, lon, zoom);
var ggg = isImage ?
Imaging.Images.Current.GetFileName(template) :
Elevation.Heights.Current.GetFileName(template);
if (ggg != x)
{
throw new InvalidOperationException();
}
return(new Tuple <StandardChunkMetadata, bool>(template, isImage));
}
public static StandardChunkMetadata GetRangeFromKey(long key)
{
if (key == 0)
{
return(null);
}
int zoomLevel = (int)(key % (MaxZoomLevel + 1));
Angle frameSize = frameSizeForZoom[zoomLevel];
int latNumPossible = (int)(usDeltaLat.Abs / frameSize.Abs);
int lonNumPossible = (int)(usDeltaLon.Abs / frameSize.Abs);
int encodedLat = (int)(key / (MaxZoomLevel + 1) % 0x100000000);
int encodedLon = (int)(key / (MaxZoomLevel + 1) / 0x100000000);
int sizeMultiplierLat = encodedLat - 3 * latNumPossible;
int sizeMultiplierLon = encodedLon - 3 * lonNumPossible;
Angle latLo = Angle.Add(Angle.Multiply(frameSize, sizeMultiplierLat), usMinLat);
Angle lonLo = Angle.Add(Angle.Multiply(frameSize, sizeMultiplierLon), usMinLon);
Angle latHi = Angle.Add(Angle.Multiply(frameSize, sizeMultiplierLat + 1), usMinLat);
Angle lonHi = Angle.Add(Angle.Multiply(frameSize, sizeMultiplierLon + 1), usMinLon);
StandardChunkMetadata ret = new StandardChunkMetadata(
numPixelsForZoom + 1, numPixelsForZoom + 1,
latLo, lonLo,
latHi, lonHi,
zoomLevel, key);
return(ret);
}
public static StandardChunkMetadata ParseBase(string x)
{
var parts = x.Split('.');
var split1 = Math.Max(x.IndexOf('n'), x.IndexOf('s'));
var split2 = Math.Max(x.IndexOf('w'), x.IndexOf('e'));
var lat = Angle.Parse(x.Substring(0, split1 + 1));
var lon = Angle.Parse(x.Substring(split1 + 1, split2 - split1));
var zoom = int.Parse(parts[0].Substring(split2 + 1));
return(StandardChunkMetadata.GetRangeContaingPoint(lat, lon, zoom));
}
