private Image GetTileImage(string mbtilefile, string level, int col, int row)
{
if (File.Exists(mbtilefile))
{
var connectionString = string.Format("Data Source={0}", mbtilefile);
var mbTileProvider = new MbTileProvider(connectionString);
var image = mbTileProvider.GetTile(level, col, row);
return(image);
}
return(null);
}
public void FirstTest()
{
// arrange
var connectionString = string.Format("Data Source={0}", "cities.mbtile");
var mbTileProvider = new MbTileProvider(connectionString);
// act
var image = mbTileProvider.GetTile("0", 0, 0);
// assert
Assert.IsTrue(image != null);
}
public HttpResponseMessage Get(int level, int col, int row)
{
HttpResponseMessage response = new HttpResponseMessage();
var fullPath = System.Web.Hosting.HostingEnvironment.MapPath(@"~/App_Data/countries-raster.mbtiles");
var connectionString = string.Format("Data Source={0}", fullPath);
var mbTileProvider = new MbTileProvider(connectionString);
MemoryStream image = mbTileProvider.GetTile(level, col, row);
response.Content = new StreamContent(image); // this file stream will be closed by lower layers of web api for you once the response is completed.
response.Content.Headers.ContentType = new MediaTypeHeaderValue("image/png");
return(response);
}
private static byte[] FindInMbTilesTileSources(string layer, string level, int col, int row)
{
var mbtiledir = ConfigurationManager.AppSettings["MbTileDir"];
var mbtiledb = mbtiledir + GetDataSource(layer);
if (!File.Exists(mbtiledb))
{
return(null);
}
// todo: hoe werkt dit?
var ymax = 1 << Int32.Parse(level);
var y = ymax - row - 1;
var connectionString = string.Format("Data Source={0}", mbtiledb);
var mbTileProvider = new MbTileProvider(connectionString);
return(mbTileProvider.GetTile(level, col, y));
}
