Examples with ParameterDescriptor org.opengis.parameter.ParameterDescriptor used on opensource projects

Example 11 with ParameterDescriptor

use of org.opengis.parameter.ParameterDescriptor in project sis by apache.

the class InitializerTest method testRadiusOfConformalSphere.

/**
 * Tests the {@link Initializer#radiusOfConformalSphere(double)} method.
 * This test computes the Radius of Conformal Sphere using the values given
 * by the <a href="http://www.iogp.org/pubs/373-07-2.pdf">EPSG guide</a> for
 * the <cite>Amersfoort / RD New</cite> projection (a Stereographic one).
 */
@Test
public void testRadiusOfConformalSphere() {
    final OperationMethod op = new ObliqueStereographic();
    final ParameterValueGroup p = op.getParameters().createValue();
    /*
         * Following parameters are not given explicitely by EPSG definitions since they are
         * usually inferred from the datum.  However in the particular case of this test, we
         * need to provide them. The names used below are either OGC names or SIS extensions.
         */
    p.parameter("semi_major").setValue(6377397.155);
    p.parameter("inverse_flattening").setValue(299.15281);
    /*
         * Following parameters are reproduced verbatim from EPSG registry and EPSG guide.
         */
    p.parameter("Latitude of natural origin").setValue(52.156160556);
    p.parameter("Longitude of natural origin").setValue(5.387638889);
    p.parameter("Scale factor at natural origin").setValue(0.9999079);
    p.parameter("False easting").setValue(155000.00);
    p.parameter("False northing").setValue(463000.00);
    /*
         * The following lines are a typical way to create an Initializer instance.
         * The EnumMap tells to the Initializer constructor which parameters to look for.
         * We construct this map here for testing purpose, but users normally do not have
         * to do that since this map is provided by the ObliqueStereographic class itself.
         */
    final EnumMap<NormalizedProjection.ParameterRole, ParameterDescriptor<Double>> roles = new EnumMap<>(NormalizedProjection.ParameterRole.class);
    roles.put(NormalizedProjection.ParameterRole.CENTRAL_MERIDIAN, ObliqueStereographic.LONGITUDE_OF_ORIGIN);
    roles.put(NormalizedProjection.ParameterRole.SCALE_FACTOR, ObliqueStereographic.SCALE_FACTOR);
    roles.put(NormalizedProjection.ParameterRole.FALSE_EASTING, ObliqueStereographic.FALSE_EASTING);
    roles.put(NormalizedProjection.ParameterRole.FALSE_NORTHING, ObliqueStereographic.FALSE_NORTHING);
    final Initializer initializer = new Initializer(op, (Parameters) p, roles, (byte) 0);
    /*
         * The following lines give an example of how Apache SIS projection constructors
         * use the Initializer class.
         */
    final double φ0 = toRadians(initializer.getAndStore(ObliqueStereographic.LATITUDE_OF_ORIGIN));
    assertTrue(φ0 > 0);
    assertEquals("Conformal Sphere Radius", 6382644.571, 6377397.155 * initializer.radiusOfConformalSphere(sin(φ0)), Formulas.LINEAR_TOLERANCE);
}

Example 12 with ParameterDescriptor

use of org.opengis.parameter.ParameterDescriptor in project sis by apache.

the class NormalizedProjection method getParameterDescriptors.

/**
 * Returns a description of the non-linear internal parameters of this {@code NormalizedProjection}.
 * The returned group contains at least a descriptor for the {@link #eccentricity} parameter.
 * Subclasses may add more parameters.
 *
 * <p>This method is for inspecting the parameter values of this non-linear kernel only,
 * not for inspecting the {@linkplain #getContextualParameters() contextual parameters}.
 * Inspecting the kernel parameter values is usually for debugging purpose only.</p>
 *
 * @return a description of the internal parameters.
 */
@Debug
@Override
public ParameterDescriptorGroup getParameterDescriptors() {
    Class<?> type = getClass();
    while (!Modifier.isPublic(type.getModifiers())) {
        type = type.getSuperclass();
    }
    ParameterDescriptorGroup group;
    synchronized (DESCRIPTORS) {
        group = DESCRIPTORS.get(type);
        if (group == null) {
            final ParameterBuilder builder = new ParameterBuilder().setRequired(true);
            if (type.getName().startsWith(Modules.CLASSNAME_PREFIX)) {
                builder.setCodeSpace(Citations.SIS, Constants.SIS);
            }
            final String[] names = getInternalParameterNames();
            final ParameterDescriptor<?>[] parameters = new ParameterDescriptor<?>[names.length + 1];
            parameters[0] = MapProjection.ECCENTRICITY;
            for (int i = 1; i < parameters.length; i++) {
                parameters[i] = builder.addName(names[i - 1]).create(Double.class, null);
            }
            group = builder.addName(CharSequences.camelCaseToSentence(type.getSimpleName()) + " (radians domain)").createGroup(1, 1, parameters);
            DESCRIPTORS.put(type, group);
        }
    }
    return group;
}