Examples of org.geotools.referencing.operation.transform.GeocentricTranslation

org.geotools.referencing.operation.transform.GeocentricTranslation

An affine transform applied on {@linkplain org.opengis.referencing.crs.GeocentricCRS geocentric}coordinates. While "geocentric translation" is a little bit more restrictive name, it describes the part which is common to all instances of this class. A rotation may also be performed in addition of the translation, but the rotation sign is operation-dependent (EPSG 9606 and 9607 have opposite sign). This transform is used for the following operations:

EPSG name	EPSG code
Geocentric translations	9603
Position Vector 7-param. transformation	9606
Coordinate Frame rotation	9607

The conversion between geographic and geocentric coordinates is usually not part of this transform. However, the Geotools implementation of the {@linkplain GeocentricTranslation.Provider provider} accepts the following extensions:

If {@code "src_semi_major"} and {@code "src_semi_minor"} parameters are provided, thena {@code "Ellipsoid_To_Geocentric"} transform is concatenated before this transform.
If {@code "tgt_semi_major"} and {@code "tgt_semi_minor"} parameters are provided, thena {@code "Geocentric_To_Ellipsoid"} transform is concatenated after this transform.

@since 2.2 @source $URL$ @version $Id$ @author Martin Desruisseaux (IRD)

     * @throws FactoryException when the size of source and destination point
     *         is not the same or if the number of points is too small to
     *         define such transformation.
     */
    protected MathTransform computeMathTransform() throws FactoryException {
        return new GeocentricTranslation(getBursaWolfParameters(targetDatum));
    }

        bwp.ex = random.nextDouble() * 10;
        bwp.ey = random.nextDouble() * 10;
        bwp.ez = random.nextDouble() * 10;
        bwp.ppm = random.nextDouble() * 10;


        GeocentricTranslation gt = new GeocentricTranslation(bwp);


        for (int i = 0; i < (3 * 10); i++) {
            double gamma = ((45 + (random.nextDouble() * 10)) * Math.PI) / 180;
            double alfa = ((45 + (random.nextDouble() * 10)) * Math.PI) / 180;


            //   generate source points
            ptSrc = new GeneralDirectPosition(R * Math.sin(gamma) * Math.cos(
                        alfa), R * Math.sin(gamma) * Math.cos(alfa),
                    R * Math.cos(gamma));


            double[] pom = new double[3];


            //  generates destination points
            gt.transform(ptSrc.getCoordinate(), 0, pom, 0, 1);
            ptDst = new GeneralDirectPosition(pom);
            vectors.add(new MappedPosition(ptSrc,ptDst));
        }


        BursaWolfTransformBuilder BWPT = new BursaWolfTransformBuilder(vectors);

Examples of org.geotools.referencing.operation.transform.GeocentricTranslation

Related Classes of org.geotools.referencing.operation.transform.GeocentricTranslation