Examples of org.geotools.gce.imagemosaic.ImageMosaicFormat

org.geotools.gce.imagemosaic.ImageMosaicFormat
{@link AbstractGridFormat} subclass for controlling {@link ImageMosaicReader} creation. As thename says, it handles mosaic of georeferenced images, which means
1. tiff+tfw+prj
2. jpeg+tfw+prj
3. png+tfw+prj
4. geotiff
This does not mean that you throw there a couple of images and it will do the trick no matter how these images are. Requirements are:
- (almost) equal spatial resolution
- same number of bands
- same data type
- same projection
The first requirement can be relaxed a little but if they have the same spatial resolution the performances are much better. There are parameters that you can use to control the behaviour of the mosaic in terms of thresholding and transparency. They are as follows:
- --DefaultParameterDescriptor FINAL_ALPHA = new DefaultParameterDescriptor( "FinalAlpha", Boolean.class, null, Boolean.FALSE)-- It asks the plugin to add transparency on the final created mosaic. IT simply performs a threshonding looking for areas where there is no data, i.e., intensity is really low and transform them into transparent areas. It is obvious that depending on the nature of the input images it might interfere with the original values.
- ---ALPHA_THRESHOLD = new DefaultParameterDescriptor( "AlphaThreshold", Double.class, null, new Double(1));--- Controls the transparency addition by specifying the treshold to use.
- INPUT_IMAGE_THRESHOLD = new DefaultParameterDescriptor( "InputImageROI", Boolean.class, null, Boolean.FALSE)--- INPUT_IMAGE_THRESHOLD_VALUE = new DefaultParameterDescriptor( "InputImageROIThreshold", Integer.class, null, new Integer(1));--- These two can be used to control the application of ROIs on the input images based on tresholding values. Basically using the threshold you can ask the mosaic plugin to load or not certain pixels of the original images.

        // the datastore.properties file is also mandatory...
        File dsp =  TestData.file(this,"datastore.properties");
        FileUtils.copyFileToDirectory(dsp, mosaic);


        // have the reader harvest it
        ImageMosaicFormat format = new ImageMosaicFormat();
        ImageMosaicReader reader = format.getReader(mosaic);
        assertNotNull(reader);
        
        // Checking whether different sample images have been created
        final File sampleImage1 = new File(TestData.file(this,"."),"nc_sampleimages/BrOsample_image");
        final File sampleImage2 = new File(TestData.file(this,"."),"nc_sampleimages/NO2sample_image");

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    @Ignore
        public void oracle() throws IOException, ParseException, NoSuchAuthorityCodeException, FactoryException {
                final File workDir=new File("C:\\data\\dlr\\ascatL1_mosaic");
                
            
                final AbstractGridFormat format = new ImageMosaicFormat();
                assertNotNull(format);
                ImageMosaicReader reader = (ImageMosaicReader) format.getReader(workDir.toURI().toURL());
                assertNotNull(format);
                String[] names = reader.getGridCoverageNames();
                String name = names[1];

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            }
        }
        
        // scan each subdirectory and try to build a mosaic in it, accumulate the resulting mosaics
        List<MosaicInfo> mosaics = new ArrayList<MosaicInfo>();
        ImageMosaicFormat mosaicFactory = new ImageMosaicFormat();
        for (File subdir : directories) {
            if(mosaicFactory.accepts(subdir, hints)) {
                if(LOGGER.isLoggable(Level.FINE)){
                    LOGGER.fine("Trying to build mosaic for the directory:"+subdir.getAbsolutePath());
                }                
                mosaics.add(new MosaicInfo(subdir, mosaicFactory.getReader(subdir, hints)));
            } else {
                if(LOGGER.isLoggable(Level.INFO)){
                    LOGGER.info("Unable to build mosaic for the directory:"+subdir.getAbsolutePath());
                }
            }

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        finally {
            dir.dispose();
        }


        // have the image mosaic write the property file
        ImageMosaicFormat format = new ImageMosaicFormat();
        ImageMosaicReader reader = format.getReader(mosaic.getFile());
        reader.dispose();
        
        // if we have to add the time, do so now
        if (mosaic.getTimeMode() != TimeMode.NONE) {
            File propertyFile = new File(mosaic.getFile(), mosaic.getName() + ".properties");

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        final GeoServerAjaxFormLink createStoreLink = new GeoServerAjaxFormLink( "createStore" ) {
            @Override
            public void onClick(AjaxRequestTarget target, Form form) {
                final String layerGroupName = getNonNullGroupName(target);
                if(layerGroupName != null) {
                    CoverageStoreNewPage coverageStoreCreator = new CoverageStoreNewPage(new ImageMosaicFormat().getName()) {
                        protected void onSuccessfulSave(org.geoserver.catalog.CoverageStoreInfo info, org.geoserver.catalog.Catalog catalog, org.geoserver.catalog.CoverageStoreInfo savedStore) {
                            EoCoverageSelectorPage page = new EoCoverageSelectorPage(EoLayerGroupAbstractPage.this, layerGroupName, savedStore.getId());
                            setResponsePage(page);
                        };
                    };

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        WorkspaceInfo ws = getCatalog().getWorkspaceByName("gs");
        // Creation of a CoverageStore
        CoverageStoreInfo store = builder.buildCoverageStore("watertemp4");
        store.setURL(DataUtilities.fileToURL(mosaic).toExternalForm());
        store.setWorkspace(ws);
        ImageMosaicFormat imageMosaicFormat = new ImageMosaicFormat();
        store.setType((imageMosaicFormat.getName()));
        // Addition to the catalog
        getCatalog().add(store);
        builder.setStore(store);
        // Input reader used for reading the mosaic folder
        GridCoverage2DReader reader = null;
        // Reader used for checking if the mosaic has been configured correctly
        StructuredGridCoverage2DReader reader2 = null;


        try {
            // Selection of the reader to use for the mosaic
            reader = (GridCoverage2DReader) imageMosaicFormat.getReader(DataUtilities
                    .fileToURL(mosaic));


            // configure the coverage
            configureCoverageInfo(builder, store, reader);

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