Examples of org.geotools.process.raster.PolygonExtractionProcess

org.geotools.process.raster.PolygonExtractionProcess

A process for raster to vector conversion. Regions of uniform value in an input {@linkplain GridCoverage2D} are converted into {@linkplain Polygon}s by tracing the cell boundaries. Results are returned as a {@linkplain SimpleFeatureCollection} in which each feature corresponds to a rasterregion with the boundary {@code Polygon} as its default geometry ("the_geom")and the value of the raster region cells as an attribute ("value").

Optionally, a list of classification ranges ( {@linkplain org.jaitools.numeric.Range} objects) can be provided to pre-classify the input coverage values into intervals. Vectorizing can also be restricted to a sub-area of the coverage and/or a subset of raster values (by defining values to treat as no-data). @author Simone Giannecchini, GeoSolutions @since 8.0 @source $URL$ @version $Id$

    private static final GridCoverageFactory covFactory = CoverageFactoryFinder.getGridCoverageFactory(null);
    private PolygonExtractionProcess process;


    @Before
    public void setup() {
        process = new PolygonExtractionProcess();
    }

    @Test
    public void testProcessStandaloneBasic() throws Exception {
      final GridCoverage2D gc = (GridCoverage2D) getCatalog().getCoverageByName(DEM.getLocalPart()).getGridCoverage(null, GeoTools.getDefaultHints());
      scheduleForDisposal(gc);
      
      final PolygonExtractionProcess process = new PolygonExtractionProcess();
    final SimpleFeatureCollection fc = process.execute(
        gc, 
        0,
        true, 
        null, 
        null,

Examples of org.geotools.process.raster.PolygonExtractionProcess

Related Classes of org.geotools.process.raster.PolygonExtractionProcess