示例#1
0
  /**
   * description: the following TIFFKeys count as indicator if a TIFF-File carries GeoTIFF
   * information: <br>
   * ModelPixelScaleTag = 33550 (SoftDesk) <br>
   * ModelTransformationTag = 34264 (JPL Carto Group) <br>
   * ModelTiepointTag = 33922 (Intergraph) <br>
   * GeoKeyDirectoryTag = 34735 (SPOT) <br>
   * GeoDoubleParamsTag = 34736 (SPOT) <br>
   * GeoAsciiParamsTag = 34737 (SPOT)
   */
  private boolean isGeoTiff(TIFFImage image) {
    TIFFDirectory directory = (TIFFDirectory) image.getProperty("tiff_directory");

    if (directory.getField(GeoTiffTag.ModelPixelScaleTag) == null
        && directory.getField(GeoTiffTag.ModelTransformationTag) == null
        && directory.getField(GeoTiffTag.ModelTiepointTag) == null
        && directory.getField(GeoTiffTag.GeoKeyDirectoryTag) == null
        && directory.getField(GeoTiffTag.GeoDoubleParamsTag) == null
        && directory.getField(GeoTiffTag.GeoAsciiParamsTag) == null) {
      return false;
    }
    return true;
  }
示例#2
0
  /**
   * @return the bbox
   * @throws GeoTiffException
   */
  public Envelope getBoundingBox() throws GeoTiffException {

    TIFFField modelPixelScaleTag = this.tifdir.getField(GeoTiffTag.ModelPixelScaleTag);
    double resx = modelPixelScaleTag.getAsDouble(0);
    double resy = modelPixelScaleTag.getAsDouble(1);

    TIFFField modelTiepointTag = this.tifdir.getField(GeoTiffTag.ModelTiepointTag);
    double val1 = 0.0;
    val1 = modelTiepointTag.getAsDouble(0);
    double val2 = 0.0;
    val2 = modelTiepointTag.getAsDouble(1);
    double val4 = 0.0;
    val4 = modelTiepointTag.getAsDouble(3);
    double val5 = 0.0;
    val5 = modelTiepointTag.getAsDouble(4);

    if ((resx == 0.0 || resy == 0.0)
        || (val1 == 0.0 && val2 == 0.0 && val4 == 0.0 && val5 == 0.0)) {
      throw new GeoTiffException("The image/coverage hasn't a bounding box");
      // set the geoparams derived by geoTiffTags
    }

    // upper/left pixel
    double xOrigin = val4 - (val1 * resx);
    double yOrigin = val5 - (val2 * resy);

    // lower/right pixel
    double xRight = xOrigin + image.getWidth() * resx;
    double yBottom = yOrigin - image.getHeight() * resy;

    double xmin = xOrigin;
    double ymin = yBottom;
    double xmax = xRight;
    double ymax = yOrigin;

    Envelope envelope = geometryFactory.createEnvelope(xmin, ymin, xmax, ymax, null);

    return envelope;
  }
示例#3
0
  /**
   * @param file
   * @throws FileNotFoundException
   * @throws IOException
   * @throws GeoTiffException
   */
  public GeoTiffReader(File file) throws FileNotFoundException, IOException, GeoTiffException {

    TIFFDecodeParam decodeParam = new TIFFDecodeParam();
    int geodirectory = 0;

    FileInputStream fis = new FileInputStream(file);
    FileCacheSeekableStream fcss = new FileCacheSeekableStream(fis);
    this.image = new TIFFImage(fcss, decodeParam, geodirectory);

    if (!isGeoTiff(this.image)) {
      throw new GeoTiffException("GeoTiffReader: TIFF is no GeoTIFF image!");
    }

    this.tifdir = (TIFFDirectory) image.getProperty("tiff_directory");

    if (this.tifdir.getField(GeoTiffTag.GeoKeyDirectoryTag) != null) {
      setGeoKeyDirectoryTag();
    }
    fcss.close();
  }