Examples of org.geotools.process.raster.AreaGridProcess

org.geotools.process.raster.AreaGridProcess
A process that build a regular cell grid where each pixel represents its effective area in the envelope in square meters.
Internally the process uses a reprojection to EckertIV to ensure proper area computation. Current limitations:
- won't work for very large rasters since it allocates the entire grid in memory
- area accuracy increases as the cell size shrinks, avoid having cells that occupy sizeable chunks of the world
@author Luca Paolino - GeoSolutions @source $URL$

    private static final Logger logger = Logging.getLogger(AreaGridProcessTest.class);


    @Test(expected = ProcessException.class)
    public void testAreaGridCRS() throws Exception {
        logger.info("AREAGRIDPROCESS: Performing CRS test");
        AreaGridProcess process = new AreaGridProcess();
        ReferencedEnvelope envelope = new ReferencedEnvelope(-180, 180, -90, 90, null);
        process.execute(envelope, -2, 10);
    }

View Full Code Here

    }


    @Test(expected = ProcessException.class)
    public void testAreaGridParameters() throws Exception {
        logger.info("AREAGRIDPROCESS: Performing parameter test");
        AreaGridProcess process = new AreaGridProcess();
        CoordinateReferenceSystem crs = org.geotools.referencing.crs.DefaultGeographicCRS.WGS84;
        ReferencedEnvelope envelope = new ReferencedEnvelope(-180, 180, -90, 90, crs);
        process.execute(envelope, -2, 10);
    }

View Full Code Here

        assertEquals(0, (area - sum) / area, 0.001); 
    }




    private double computeTotalArea(int width, int height, ReferencedEnvelope envelope) {
        AreaGridProcess process = new AreaGridProcess();
        GridCoverage2D grid = process.execute(envelope, width, height);
        assertEquals(envelope, new ReferencedEnvelope(grid.getEnvelope()));
        assertEquals(width, grid.getGridGeometry().getGridRange().getSpan(0));
        assertEquals(height, grid.getGridGeometry().getGridRange().getSpan(1));
        
        double sum = 0.0;

View Full Code Here

TOP

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

com.vividsolutions.jts.geom.Coordinate

com.vividsolutions.jts.geom.Geometry

com.vividsolutions.jts.geom.GeometryFactory

com.vividsolutions.jts.geom.LinearRing

com.vividsolutions.jts.geom.Polygon

org.geotools.coverage.grid.GridCoverage2D

org.geotools.coverage.grid.GridCoverageFactory

org.geotools.process.raster.AreaGridProcessTest

org.opengis.referencing.crs.CoordinateReferenceSystem

org.opengis.referencing.operation.MathTransform

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.