GeoTools errors and warnings reading .tif file

Question

I'm trying to read my .tiff image using GeoTools. After reading I intend to perform georeferencing of the image using the four coordinates of the image. Following is my code.

public static void main(String[] args) throws IOException, FactoryException {
        AbstractGridCoverage2DReader data = new GeoTiffReader(new FileInputStream(new File("a.tif")));
        GridCoverageFactory gcf = new GridCoverageFactory();
        CoordinateReferenceSystem crs = CRS.decode("EPSG:29901");// null;//null;

        int llx = 500000;
        int lly = 105000;
        int urx = 501000;
        int ury = 106000;

        ReferencedEnvelope referencedEnvelope = new ReferencedEnvelope(llx, urx, lly, ury, crs);
        GridCoverage2D gc = gcf.create("name", (RenderedImage) data, referencedEnvelope);
        String url = "random.tif";
        File file = new File(url);
        GeoTiffWriter writer = null;
        try {
            writer = new GeoTiffWriter(file);
        } catch (IOException e) {
            e.printStackTrace();
        }
        writer.write(gc, null);
        writer.dispose();
    }

I am getting the following exceptions and warnings.

WARNING: Coordinate Reference System is not available
Exception in thread "main" org.geotools.data.DataSourceException: Raster to Model Transformation is not available for: null
    at org.geotools.gce.geotiff.GeoTiffReader.<init>(GeoTiffReader.java:279)
    at org.geotools.gce.geotiff.GeoTiffReader.<init>(GeoTiffReader.java:192)
    at IrishGridConverter.main(IrishGridConverter.java:26)
Caused by: org.geotools.data.DataSourceException: Raster to Model Transformation is not available for: null
    at org.geotools.gce.geotiff.GeoTiffReader.getHRInfo(GeoTiffReader.java:539)
    at org.geotools.gce.geotiff.GeoTiffReader.<init>(GeoTiffReader.java:265)
    ... 2 more

what could be the potential reasons, and how can I solve?

Answer 1

This is caused by trying to read in a "normal" tiff file with no spatial data in it. GeoTools is trying to find the required parts of a GeoTiff and not finding them.

You should read in your tiff using BufferedImage image = ImageIO.read(inputFile); and you can then create a coverage using GridCoverage2D gc = gcf.create("name", image, referencedEnvelope);