private async Task WriteTiles(string outDir)
{
var srcMRR = viewModel.Path;
this.IsEnabled = false;
var tileGenerator = viewModel.SelectedGenerator.Generator;
await Task.Run(() =>
{
Stopwatch s = new Stopwatch();
s.Start();
int maxZoom, totalTiles;
IRasterDataset dataSet = RasterDatasetFactory.Open(srcMRR);
tileGenerator.GetJobSize(dataSet, viewModel.MaxZoom > 0 ? viewModel.MaxZoom : 100, out maxZoom, out totalTiles);
viewModel.MaxProgress = totalTiles;
viewModel.ProgressVisible = Visibility.Visible;
viewModel.ResetProgress();
System.Progress <int> progress = new Progress <int>((i) => viewModel.AddToProgress(1));
var output = new CompressedFileOutput(outDir);
tileGenerator.CreateAllTiles(dataSet, maxZoom, output, progress);
CreateMissingTopLevelTile(outDir, output);
s.Stop();
Console.WriteLine(s.Elapsed);
});
this.IsEnabled = true;
viewModel.ProgressVisible = Visibility.Collapsed;
}
public static void CreateTabFilesForRasterFiles(string[] strRasterFiles, string sCoordsys, bool bOverwriteTabFile)
{
if (strRasterFiles.Length > 0)
{
foreach (string sRasterFile in strRasterFiles)
{
RasterDatasetFactory.CreateTABFile(sRasterFile, sCoordsys, bOverwriteTabFile, true);
}
}
}
public static double GetCellAreaAboveThreshold(string inputFile, int fieldIndex, int bandIndex, double threshold)
{
// number of cells over threshold
double cellCount = 0;
// open the file and get the dataset
var dataset = RasterDatasetFactory.Open(inputFile);
// get the raster info
var info = dataset.Info;
// get sequential tile iterator for read for current field
var iterator = dataset.GetSequentialTileIterator(fieldIndex);
// begin the iterator
iterator.Begin();
// iterate over each tile in raster
foreach (var tile in iterator)
{
// get band to read
uint ubandIndex = (uint)bandIndex;
var band = tile.GetBandData <double>(ubandIndex);
// iterate over each cell in tile and read
for (uint y = 0; y < tile.YSize; y++)
{
for (uint x = 0; x < tile.XSize; x++)
{
double value;
bool valid;
// get the cell value
band.GetCellValue(x + y * tile.XSize, out value, out valid);
// check its valid and above threshold
if (valid && (value > threshold))
{
cellCount++;
}
}
}
}
// end the iterator
iterator.End();
// close the dataset
dataset.Close();
// calculate area
return(cellCount * (info.FieldInfo[fieldIndex].CellSizeX.Decimal * info.FieldInfo[fieldIndex].CellSizeY.Decimal));
}
public static void CreateTabFileForRasterFile(string strRasterFile, string sCoordsys, bool bOverwriteTabFile)
{
RasterDatasetFactory.CreateTABFile(strRasterFile, sCoordsys, bOverwriteTabFile, true);
}