private BufferWrapperRaster readTileRaster(MeshTile tile) {
    File file = new File(this.dataDescriptor.getFileStoreLocation(), tile.getPath());
    if (!file.exists()) return null;

    DataSource source = new BasicDataSource(file);
    source.setValue(AVKey.SECTOR, tile.getSector());

    BILRasterReader reader = new BILRasterReader();
    DataRaster[] rasters;
    try {
      rasters = reader.read(source);
    } catch (Exception e) {
      e.printStackTrace();
      return null;
    }

    return (BufferWrapperRaster) rasters[0];
  }
示例#2
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    protected void importImagery() {
      try {
        // Read the data and save it in a temp file.
        File sourceFile = ExampleUtil.saveResourceToTempFile(IMAGE_PATH, ".tif");

        // Create a raster reader to read this type of file. The reader is created from the
        // currently
        // configured factory. The factory class is specified in the Configuration, and a different
        // one can be
        // specified there.
        DataRasterReaderFactory readerFactory =
            (DataRasterReaderFactory)
                WorldWind.createConfigurationComponent(AVKey.DATA_RASTER_READER_FACTORY_CLASS_NAME);
        DataRasterReader reader = readerFactory.findReaderFor(sourceFile, null);

        // Before reading the raster, verify that the file contains imagery.
        AVList metadata = reader.readMetadata(sourceFile, null);
        if (metadata == null || !AVKey.IMAGE.equals(metadata.getStringValue(AVKey.PIXEL_FORMAT)))
          throw new Exception("Not an image file.");

        // Read the file into the raster. read() returns potentially several rasters if there are
        // multiple
        // files, but in this case there is only one so just use the first element of the returned
        // array.
        DataRaster[] rasters = reader.read(sourceFile, null);
        if (rasters == null || rasters.length == 0)
          throw new Exception("Can't read the image file.");

        DataRaster raster = rasters[0];

        // Determine the sector covered by the image. This information is in the GeoTIFF file or
        // auxiliary
        // files associated with the image file.
        final Sector sector = (Sector) raster.getValue(AVKey.SECTOR);
        if (sector == null) throw new Exception("No location specified with image.");

        // Request a sub-raster that contains the whole image. This step is necessary because only
        // sub-rasters
        // are reprojected (if necessary); primary rasters are not.
        int width = raster.getWidth();
        int height = raster.getHeight();

        // getSubRaster() returns a sub-raster of the size specified by width and height for the
        // area indicated
        // by a sector. The width, height and sector need not be the full width, height and sector
        // of the data,
        // but we use the full values of those here because we know the full size isn't huge. If it
        // were huge
        // it would be best to get only sub-regions as needed or install it as a tiled image layer
        // rather than
        // merely import it.
        DataRaster subRaster = raster.getSubRaster(width, height, sector, null);

        // Tne primary raster can be disposed now that we have a sub-raster. Disposal won't affect
        // the
        // sub-raster.
        raster.dispose();

        // Verify that the sub-raster can create a BufferedImage, then create one.
        if (!(subRaster instanceof BufferedImageRaster))
          throw new Exception("Cannot get BufferedImage.");
        BufferedImage image = ((BufferedImageRaster) subRaster).getBufferedImage();

        // The sub-raster can now be disposed. Disposal won't affect the BufferedImage.
        subRaster.dispose();

        // Create a SurfaceImage to display the image over the specified sector.
        final SurfaceImage si1 = new SurfaceImage(image, sector);

        // On the event-dispatch thread, add the imported data as an SurfaceImageLayer.
        SwingUtilities.invokeLater(
            new Runnable() {
              public void run() {
                // Add the SurfaceImage to a layer.
                SurfaceImageLayer layer = new SurfaceImageLayer();
                layer.setName("Imported Surface Image");
                layer.setPickEnabled(false);
                layer.addRenderable(si1);

                // Add the layer to the model and update the application's layer panel.
                insertBeforeCompass(AppFrame.this.getWwd(), layer);
                AppFrame.this.getLayerPanel().update(AppFrame.this.getWwd());

                // Set the view to look at the imported image.
                ExampleUtil.goTo(getWwd(), sector);
              }
            });
      } catch (Exception e) {
        e.printStackTrace();
      }
    }