/**
* 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;
}
/**
* @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();
}
