Examples of org.apache.sis.geometry.Envelope2D

org.apache.sis.geometry.Envelope2D

A two-dimensional envelope on top of {@link Rectangle2D}. This implementation is provided for inter-operability between Java2D and GeoAPI.

This class inherits {@linkplain #x x} and {@linkplain #y y} fields.But despite their names, they don't need to be oriented toward {@linkplain AxisDirection#EAST East} and{@linkplain AxisDirection#NORTH North} respectively. The (x,y) axis can have anydirection and should be understood as ordinate 0 and ordinate 1 values instead. This is not specific to this implementation; in Java2D too, the visual axis orientation depend on the {@linkplain java.awt.Graphics2D#getTransform() affine transform in the graphics context}.

{@section Spanning the anti-meridian of a Geographic CRS}The Web Coverage Service (WCS) specification authorizes (with special treatment) cases where upper < lower at least in the longitude case. They are envelopes spanning the anti-meridian, like the red box below (the green box is the usual case). For {@code Envelope2D} objects, they are rectangle with negative {@linkplain #width width} or{@linkplain #height height} field values. The default implementation of methods listed in theright column can handle such cases.

Supported methods:

{@link #getMinimum(int)}
{@link #getMaximum(int)}
{@link #getSpan(int)}
{@link #getMedian(int)}
{@link #isEmpty()}
{@link #contains(double,double)}
{@link #contains(Rectangle2D)} and its variant receiving {@code double} arguments
{@link #intersects(Rectangle2D)} and its variant receiving {@code double} arguments
{@link #createIntersection(Rectangle2D)}
{@link #createUnion(Rectangle2D)}
{@link #add(Rectangle2D)}
{@link #add(double,double)}

The {@link #getMinX()}, {@link #getMinY()}, {@link #getMaxX()}, {@link #getMaxY()}, {@link #getCenterX()}, {@link #getCenterY()}, {@link #getWidth()} and {@link #getHeight()}methods delegate to the above-cited methods. @author Martin Desruisseaux (IRD, Geomatys) @author Johann Sorel (Geomatys) @since 0.3 (derived from geotk-2.1) @version 0.3 @module @see GeneralEnvelope @see org.apache.sis.metadata.iso.extent.DefaultGeographicBoundingBox

     * Tests {@link Matrices#createTransform(Envelope, Envelope)}.
     * This method tests the example given in {@code Matrices.createTransform(…)} javadoc.
     */
    @Test
    public void testCreateTransformFromEnvelopes() {
        final Envelope srcEnvelope = new Envelope2D(null, -20, -40, 100, 200);
        final Envelope dstEnvelope = new Envelope2D(null, -10, -25, 300, 500);
        MatrixSIS matrix = Matrices.createTransform(srcEnvelope, dstEnvelope);
        assertTrue ("isAffine",   matrix.isAffine());
        assertFalse("isIdentity", matrix.isIdentity());
        assertEquals("numRow", 3, matrix.getNumRow());
        assertEquals("numCol", 3, matrix.getNumCol());

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     * This method tests the example given in {@code Matrices.createTransform(…)} javadoc.
     */
    @Test
    @DependsOnMethod({"testCreateTransformFromEnvelopes", "testCreateTransformWithLessAxes"})
    public void testCreateTransformFromEnvelopesAndAxes() {
        final Envelope srcEnvelope = new Envelope2D(null, -40, +20, 200, 100); // swapped (y,-x)
        final Envelope dstEnvelope = new Envelope2D(null, -10, -25, 300, 500);
        MatrixSIS matrix = Matrices.createTransform(
                srcEnvelope, new AxisDirection[] {NORTH, WEST},
                dstEnvelope, new AxisDirection[] {EAST, NORTH});
        assertTrue ("isAffine",   matrix.isAffine());
        assertFalse("isIdentity", matrix.isIdentity());

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      String urLat = request.getParameter("urLat");
      String urLon = request.getParameter("urLon");


      if (llLat != null && llLon != null && urLat != null && urLon != null) {
        try {
          Envelope2D bbox = new Envelope2D(new DirectPosition2D(
              Double.parseDouble(llLon), Double.parseDouble(llLat)),
              new DirectPosition2D(Double.parseDouble(urLon), Double.parseDouble(urLat)));


          beforeTime = System.currentTimeMillis();
          results = tree.queryByBoundingBox(bbox);
          afterTime = System.currentTimeMillis();
          // get the polygon that approximates the region
          Rectangle2D[] rects = bbox.toRectangles();
          for (int i = 0; i < rects.length; i++) {
            final Rectangle2D r = rects[i];
            String regionStr = (r.getMinY()) + "," + (r.getMinX()) + ",";
            regionStr += (r.getMaxY()) + "," + (r.getMinX()) + ",";
            regionStr += (r.getMaxY()) + "," + (r.getMaxX()) + ",";

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Related Classes of org.apache.sis.geometry.Envelope2D

org.apache.sis.referencing.operation.matrix.MatricesTest

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org.opengis.referencing.cs.CoordinateSystemAxis

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