GeoTIFF Plugin

The gt-geotiff module in the plugin group provides access to the GeoTiff file format.





You can use GeoTiff files directly using GridFormatFinder:

File file = new File("test.tiff");

AbstractGridFormat format = GridFormatFinder.findFormat( file );
GridCoverage2DReader reader = format.getReader( file );

You can also use GeoTiffReader directly:

File file = new File("test.tiff");

GeoTiffReader reader = new GeoTiffReader(file, new Hints(Hints.FORCE_LONGITUDE_FIRST_AXIS_ORDER, Boolean.TRUE));

You can use the reader to access a GridCoverage2D as normal:

GridCoverage2D coverage = (GridCoverage2D);
CoordinateReferenceSystem crs = coverage.getCoordinateReferenceSystem2D();
Envelope env = coverage.getEnvelope();
RenderedImage image = coverage.getRenderedImage();

GeoTIFF Coordinate System Construction

What makes GeoTIFF useful is the ability to store extend, and coordinate reference system information in the metadata fields of a normal TIFF file.


The above “flowchart” describes the order in which the GeoTIFF plugin examines the GeoTIFF tags and Keys in order to construct a coordinate system to accompany the raster data.