public override PointLatLng FromPixelToLatLng(int x, int y, int zoom)
{
PointLatLng ret = PointLatLng.Zero;
MapSize s = GetTileMatrixSizePixel(zoom);
double mapSizeX = s.Width;
double mapSizeY = s.Height;
double xx = (Clip(x, 0, mapSizeX - 1) / mapSizeX) - 0.5;
double yy = 0.5 - (Clip(y, 0, mapSizeY - 1) / mapSizeY);
ret.Lat = 90 - 360 * Math.Atan(Math.Exp(-yy * 2 * Math.PI)) / Math.PI;
ret.Lng = 360 * xx;
return(ret);
}
public override MapPoint FromLatLngToPixel(double lat, double lng, int zoom)
{
MapPoint ret = MapPoint.Empty;
lat = Clip(lat, MinLatitude, MaxLatitude);
lng = Clip(lng, MinLongitude, MaxLongitude);
double x = (lng + 180) / 360;
double sinLatitude = Math.Sin(lat * Math.PI / 180);
double y = 0.5 - Math.Log((1 + sinLatitude) / (1 - sinLatitude)) / (4 * Math.PI);
MapSize s = GetTileMatrixSizePixel(zoom);
int mapSizeX = s.Width;
int mapSizeY = s.Height;
ret.X = (int)Clip(x * mapSizeX + 0.5, 0, mapSizeX - 1);
ret.Y = (int)Clip(y * mapSizeY + 0.5, 0, mapSizeY - 1);
return(ret);
}
public static MapSize Subtract(MapSize sz1, MapSize sz2)
{
return(new MapSize(sz1.Width - sz2.Width, sz1.Height - sz2.Height));
}
public static MapSize Add(MapSize sz1, MapSize sz2)
{
return(new MapSize(sz1.Width + sz2.Width, sz1.Height + sz2.Height));
}
public void Inflate(MapSize size)
{
Inflate(size.Width, size.Height);
}
public static MapPoint Subtract(MapPoint pt, MapSize sz)
{
return(new MapPoint(pt.X - sz.Width, pt.Y - sz.Height));
}
public static MapPoint Add(MapPoint pt, MapSize sz)
{
return(new MapPoint(pt.X + sz.Width, pt.Y + sz.Height));
}
public MapPoint(MapSize sz)
{
this.x = sz.Width;
this.y = sz.Height;
}
/// <summary>
/// gets matrix size in pixels
/// </summary>
/// <param name="zoom"></param>
/// <returns></returns>
public virtual MapSize GetTileMatrixSizePixel(int zoom)
{
MapSize s = GetTileMatrixSizeXY(zoom);
return(new MapSize(s.Width * TileSize.Width, s.Height * TileSize.Height));
}
/// <summary>
/// tile matrix size in pixels at custom zoom level
/// </summary>
/// <param name="zoom"></param>
/// <returns></returns>
public int GetTileMatrixItemCount(int zoom)
{
MapSize s = GetTileMatrixSizeXY(zoom);
return(s.Width * s.Height);
}
