/// <summary>
///
/// </summary>
/// <param name="tile"></param>
/// <returns></returns>
public bool Put(Tile tile)
{
try
{
string pathToTile = Path.Combine(_fullPath, tile.ZoomLevel.ToString());
pathToTile = Path.Combine(pathToTile, tile.X.ToString());
Directory.CreateDirectory(pathToTile);
tile.Bitmap.Save(Path.Combine(pathToTile, tile.Y.ToString()));
return true;
}
catch
{
return false;
}
}
public Tile[,] GetTiles(Envelope envelope, Rectangle bounds)
{
Coordinate mapTopLeft = envelope.TopLeft();
Coordinate mapBottomRight = envelope.BottomRight();
//Clip the coordinates so they are in the range of the web mercator projection
mapTopLeft.Y = TileCalculator.Clip(mapTopLeft.Y, TileCalculator.MinLatitude, TileCalculator.MaxLatitude);
mapTopLeft.X = TileCalculator.Clip(mapTopLeft.X, TileCalculator.MinLongitude, TileCalculator.MaxLongitude);
mapBottomRight.Y = TileCalculator.Clip(mapBottomRight.Y, TileCalculator.MinLatitude, TileCalculator.MaxLatitude);
mapBottomRight.X = TileCalculator.Clip(mapBottomRight.X, TileCalculator.MinLongitude, TileCalculator.MaxLongitude);
int zoom = TileCalculator.DetermineZoomLevel(envelope, bounds);
Point topLeftTileXY = TileCalculator.LatLongToTileXY(mapTopLeft, zoom);
Point btmRightTileXY = TileCalculator.LatLongToTileXY(mapBottomRight, zoom);
var tileMatrix = new Tile[(int)(btmRightTileXY.X - topLeftTileXY.X) + 1, (int)(btmRightTileXY.Y - topLeftTileXY.Y) + 1];
Parallel.For((int) topLeftTileXY.Y, (int) btmRightTileXY.Y + 1,
y => Parallel.For((int) topLeftTileXY.X, (int) btmRightTileXY.X + 1,
x =>
{
var currTopLeftPixXY = TileCalculator.TileXYToTopLeftPixelXY(x, y);
var currTopLeftCoord =TileCalculator.PixelXYToLatLong((int) currTopLeftPixXY.X,
(int) currTopLeftPixXY.Y, zoom);
var currBtmRightPixXY = TileCalculator.TileXYToBottomRightPixelXY(x,
y);
var currBtmRightCoord =TileCalculator.PixelXYToLatLong((int) currBtmRightPixXY.X,
(int) currBtmRightPixXY.Y, zoom);
var currEnv = new Envelope(currTopLeftCoord, currBtmRightCoord);
var tile = GetTile(x, y, currEnv, zoom);
tileMatrix[x - (int) topLeftTileXY.X, y - (int) topLeftTileXY.Y] =tile;
}
));
return tileMatrix;
}
/// <summary>
///
/// </summary>
/// <param name="x"></param>
/// <param name="y"></param>
/// <param name="envelope"></param>
/// <param name="zoom"></param>
/// <returns></returns>
public Tile GetTile(int x, int y, Envelope envelope, int zoom)
{
Bitmap bitmap = _tileCache.Get(zoom, x, y);
if (null == bitmap)
{
bitmap = GetViaBrutile(x, y, zoom, envelope);
}
if (null != bitmap)
{
var tile = new Tile(x, y, zoom, envelope, bitmap);
return tile;
}
try
{
string url = _tileServerUrl;
if (url.Contains("{key}"))
{
string quadKey = TileCalculator.TileXYToBingQuadKey(x, y, zoom);
url = url.Replace("{key}", quadKey);
}
else
{
url = url.Replace("{zoom}", zoom.ToString());
url = url.Replace("{x}", x.ToString());
url = url.Replace("{y}", y.ToString());
}
var client = new WebClient();
var stream = client.OpenRead(url);
if (stream != null)
bitmap = new Bitmap(stream);
var tile = new Tile(x, y, zoom, envelope, bitmap);
if (stream != null)
{
stream.Flush();
stream.Close();
}
//Put the tile in the cache
_tileCache.Put(tile);
return tile;
}
catch (Exception ex)
{
// We may see a 400 (Bad Request) when the user is zoomed in too far.
Debug.WriteLine(ex.Message);
//Return a No Data Available tile
var noDataTile = new Tile(x, y, zoom, envelope, resources.NoDataTile);
return noDataTile;
}
}
/// <summary>
/// Takes a 2-dimensional array of tiles and stitches it into a single Bitmap for display on the Map
/// </summary>
/// <param name="tiles">2-dimensional array of tiles, [x by y]</param>
/// <returns>Bitmap of the tiles stitched together</returns>
public static Bitmap StitchTiles(Tile[,] tiles)
{
var width = tiles.GetLength(0) * 256;
var height = tiles.GetLength(1) * 256;
//create a bitmap to hold the combined image
var finalImage = new Bitmap(width, height);
//get a graphics object from the image so we can draw on it
using (Graphics g = Graphics.FromImage(finalImage))
{
//set background color
g.Clear(Color.Black);
//go through each image and "draw" it on the final image
for (var y = 0; y < tiles.GetLength(1); y++)
{
for (var x = 0; x < tiles.GetLength(0); x++)
{
if (tiles[x, y] != null)
{
var tile = tiles[x, y].Bitmap;
g.DrawImage(tile,
new Rectangle(x * 256, y * 256, tile.Width, tile.Height));
}
}
}
}
return finalImage;
}
private Tile GetTile(int x, int y, Envelope envelope, int zoom)
{
var bitmap = GetViaBrutile(x, y, zoom, envelope);
if (bitmap != null)
{
return new Tile(x, y, zoom, envelope, bitmap);
}
try
{
var url = _tileServerUrl;
if (url == null)
{
var noDataTile = new Tile(x, y, zoom, envelope, Resources.nodata);
return noDataTile;
}
if (url.Contains("{key}"))
{
var quadKey = TileCalculator.TileXYToBingQuadKey(x, y, zoom);
url = url.Replace("{key}", quadKey);
}
else
{
url = url.Replace("{zoom}", zoom.ToString());
url = url.Replace("{x}", x.ToString());
url = url.Replace("{y}", y.ToString());
}
var client = new WebClient();
var stream = client.OpenRead(url);
if (stream != null)
bitmap = new Bitmap(stream);
var tile = new Tile(x, y, zoom, envelope, bitmap);
if (stream != null)
{
stream.Flush();
stream.Close();
}
return tile;
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message);
return new Tile(x, y, zoom, envelope, Resources.nodata);
}
}
