Examples of org.geotools.process.raster.ContourProcess

org.geotools.process.raster.ContourProcess
A process to extract contours based on values in a specified band of the input {@linkplain GridCoverage2D}. This is a geo-spatial wrapper around the JAITools "Contour" operation (see {@linkplain ContourDescriptor} for details of the underlyingalgorithm).
You can specify the specific values for which contours will be generated, or alternatively the interval between contour values.
Contours are returned as a feature collection, where each feature has, as its default geometry, a {@linkplain LineString} for the contour ("the_geom"), and the contourvalue as the {@code Double} attribute "value". @author Simone Giannecchini, GeoSolutions @since 8.0 @source $URL$ @version $Id$

    private static final GridCoverageFactory covFactory = CoverageFactoryFinder.getGridCoverageFactory(null);
    private ContourProcess process;
    
    @Before
    public void setup() {
        process = new ContourProcess();
    }

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        // extract just two isolines
        final double levels[] = new double[2];
        levels[0] = 1500;
        levels[1] = 1700;
        final ContourProcess process = new ContourProcess();
        final SimpleFeatureCollection fc = process.execute(gc, 0, levels, null, false, false, null,
                new NullProgressListener());


        assertNotNull(fc);
        assertTrue(fc.size() > 0);

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    @Test
    public void testProcessStandaloneBasicInterval() throws Exception {
        final GridCoverage2D gc = extractCoverageSubset();


        final double step = 100;
        final ContourProcess process = new ContourProcess();
        final SimpleFeatureCollection fc = process.execute(gc, 0, null, Double.valueOf(step),
                false, false, null, new NullProgressListener());


        assertNotNull(fc);
        assertTrue(fc.size() > 0);

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