Examples with GeodeticCRS org.opengis.referencing.crs.GeodeticCRS used on opensource projects

Example 6 with GeodeticCRS

use of org.opengis.referencing.crs.GeodeticCRS in project sis by apache.

the class EllipsoidalHeightCombiner method createCompoundCRS.

/**
 * Creates a compound CRS, but we special processing for (two-dimensional Geographic + ellipsoidal heights) tupples.
 * If any such tupple is found, a three-dimensional geographic CRS is created instead than the compound CRS.
 *
 * @param  properties  name and other properties to give to the new object.
 * @param  components  ordered array of {@code CoordinateReferenceSystem} objects.
 * @return the coordinate reference system for the given properties.
 * @throws FactoryException if the object creation failed.
 */
public final CoordinateReferenceSystem createCompoundCRS(final Map<String, ?> properties, CoordinateReferenceSystem... components) throws FactoryException {
    for (int i = 0; i < components.length; i++) {
        final CoordinateReferenceSystem vertical = components[i];
        if (vertical instanceof VerticalCRS) {
            final VerticalDatum datum = ((VerticalCRS) vertical).getDatum();
            if (datum != null && datum.getVerticalDatumType() == VerticalDatumTypes.ELLIPSOIDAL) {
                int axisPosition = 0;
                CoordinateSystem cs = null;
                CoordinateReferenceSystem crs = null;
                if (i == 0 || (cs = getCsIfHorizontal2D(crs = components[i - 1])) == null) {
                    /*
                         * GeographicCRS are normally before VerticalCRS. But Apache SIS is tolerant to the
                         * opposite order (note however that such ordering is illegal according ISO 19162).
                         */
                    if (i + 1 >= components.length || (cs = getCsIfHorizontal2D(crs = components[i + 1])) == null) {
                        continue;
                    }
                    axisPosition = 1;
                }
                /*
                     * At this point we have the horizontal and vertical components. The horizontal component
                     * begins at 'axisPosition', which is almost always zero. Create the three-dimensional CRS.
                     * If the result is the CRS to be returned directly by this method (components.length == 2),
                     * use the properties given in argument. Otherwise we need to use other properties; current
                     * implementation recycles the properties of the existing two-dimensional CRS.
                     */
                final CoordinateSystemAxis[] axes = new CoordinateSystemAxis[3];
                axes[axisPosition++] = cs.getAxis(0);
                axes[axisPosition++] = cs.getAxis(1);
                axes[axisPosition %= 3] = vertical.getCoordinateSystem().getAxis(0);
                final ReferencingServices referencing = ReferencingServices.getInstance();
                final Map<String, ?> csProps = referencing.getProperties(cs, false);
                final Map<String, ?> crsProps = (components.length == 2) ? properties : referencing.getProperties(crs, false);
                if (crs instanceof GeodeticCRS) {
                    initialize(CS | CRS);
                    cs = csFactory.createEllipsoidalCS(csProps, axes[0], axes[1], axes[2]);
                    crs = crsFactory.createGeographicCRS(crsProps, ((GeodeticCRS) crs).getDatum(), (EllipsoidalCS) cs);
                } else {
                    initialize(CS | CRS | OPERATION);
                    final ProjectedCRS proj = (ProjectedCRS) crs;
                    GeographicCRS base = proj.getBaseCRS();
                    if (base.getCoordinateSystem().getDimension() == 2) {
                        base = (GeographicCRS) createCompoundCRS(referencing.getProperties(base, false), base, vertical);
                    }
                    /*
                         * In Apache SIS implementation, the Conversion contains the source and target CRS together with
                         * a MathTransform2D. We need to recreate the same conversion, but without CRS and MathTransform
                         * for letting SIS create or associate new ones, which will be three-dimensional now.
                         */
                    Conversion fromBase = proj.getConversionFromBase();
                    fromBase = opFactory.createDefiningConversion(referencing.getProperties(fromBase, true), fromBase.getMethod(), fromBase.getParameterValues());
                    cs = csFactory.createCartesianCS(csProps, axes[0], axes[1], axes[2]);
                    crs = crsFactory.createProjectedCRS(crsProps, base, fromBase, (CartesianCS) cs);
                }
                /*
                     * Remove the VerticalCRS and store the three-dimensional GeographicCRS in place of the previous
                     * two-dimensional GeographicCRS. Then let the loop continues in case there is other CRS to merge
                     * (should never happen, but we are paranoiac).
                     */
                components = ArraysExt.remove(components, i, 1);
                // GeographicCRS before VerticalCRS (usual case).
                if (axisPosition != 0)
                    i--;
                components[i] = crs;
            }
        }
    }
    switch(components.length) {
        case 0:
            return null;
        case 1:
            return components[0];
        default:
            initialize(CRS);
            return crsFactory.createCompoundCRS(properties, components);
    }
}

Example 7 with GeodeticCRS

use of org.opengis.referencing.crs.GeodeticCRS in project sis by apache.

the class Proj4 method definition.

/**
 * Infers a {@literal Proj.4} definition from the given projected, geographic or geocentric coordinate reference system.
 * This method does not need the Proj.4 native library; it can be used in a pure Java application.
 * However the returned definition string may differ depending on whether the Proj.4 library is available or not.
 *
 * @param  crs  the coordinate reference system for which to create a Proj.4 definition.
 * @return the definition of the given CRS in a Proj.4 format.
 * @throws FactoryException if the Proj.4 definition string can not be created from the given CRS.
 */
public static String definition(final CoordinateReferenceSystem crs) throws FactoryException {
    ArgumentChecks.ensureNonNull("crs", crs);
    /*
         * If the given CRS object is associated to a Proj.4 structure, let Proj.4 formats itself
         * the definition string. Note that this operation may fail if there is no Proj.4 library
         * in the current system, or no JNI bindings to that library.
         */
    try {
        for (final Identifier id : crs.getIdentifiers()) {
            if (id instanceof PJ) {
                return ((PJ) id).getCode();
            }
        }
    } catch (UnsatisfiedLinkError e) {
        // Thrown the first time that we try to use the library.
        Logging.unexpectedException(Logging.getLogger(Modules.GDAL), Proj4.class, "definition", e);
    } catch (NoClassDefFoundError e) {
        // Thrown on all attempts after the first one.
        Logging.recoverableException(Logging.getLogger(Modules.GDAL), Proj4.class, "definition", e);
    }
    /*
         * If we found no Proj.4 structure, formats the definition string ourself. The string may differ from
         * what Proj.4 would have given. In particular, we do not provide "+init=" or "+datum=" parameter.
         * But the definition should still be semantically equivalent.
         */
    final String method;
    final GeodeticDatum datum;
    final ParameterValueGroup parameters;
    final CoordinateSystem cs = crs.getCoordinateSystem();
    if (crs instanceof GeodeticCRS) {
        if (cs instanceof EllipsoidalCS) {
            method = "latlon";
        } else if (cs instanceof CartesianCS) {
            method = "geocent";
        } else {
            throw new FactoryException(Errors.format(Errors.Keys.UnsupportedCoordinateSystem_1, cs.getClass()));
        }
        datum = ((GeodeticCRS) crs).getDatum();
        parameters = null;
    } else if (crs instanceof ProjectedCRS) {
        Projection c = ((ProjectedCRS) crs).getConversionFromBase();
        datum = ((ProjectedCRS) crs).getDatum();
        method = name(c.getMethod());
        parameters = c.getParameterValues();
    } else {
        throw new FactoryException(Errors.format(Errors.Keys.UnsupportedType_1, crs.getClass()));
    }
    /*
         * Append the map projection parameters. Those parameters may include axis lengths (a and b),
         * but not necessarily. If axis lengths are specified, then we will ignore the Ellipsoid instance
         * associated to the CRS.
         */
    final StringBuilder definition = new StringBuilder(100);
    definition.append(Proj4Factory.PROJ_PARAM).append(method);
    boolean hasSemiMajor = false;
    boolean hasSemiMinor = false;
    if (parameters != null) {
        definition.append(Proj4Factory.STANDARD_OPTIONS);
        for (final GeneralParameterValue parameter : parameters.values()) {
            if (parameter instanceof ParameterValue<?>) {
                final ParameterValue<?> pv = (ParameterValue<?>) parameter;
                final Object value;
                Unit<?> unit = pv.getUnit();
                if (unit != null) {
                    unit = Units.isAngular(unit) ? Units.DEGREE : unit.getSystemUnit();
                    // Always in metres or degrees.
                    value = pv.doubleValue(unit);
                } else {
                    value = pv.getValue();
                    if (value == null) {
                        continue;
                    }
                }
                final String pn = name(parameter.getDescriptor());
                hasSemiMajor |= pn.equals("a");
                hasSemiMinor |= pn.equals("b");
                definition.append(" +").append(pn).append('=').append(value);
            }
        }
    }
    /*
         * Append datum information: axis lengths if they were not part of the parameters, then prime meridian.
         */
    final Ellipsoid ellipsoid = datum.getEllipsoid();
    if (!hasSemiMajor)
        definition.append(" +a=").append(ellipsoid.getSemiMajorAxis());
    if (!hasSemiMinor)
        definition.append(" +b=").append(ellipsoid.getSemiMinorAxis());
    final PrimeMeridian pm = datum.getPrimeMeridian();
    if (pm != null) {
        double lon = pm.getGreenwichLongitude();
        final Unit<Angle> unit = pm.getAngularUnit();
        if (unit != null) {
            lon = unit.getConverterTo(Units.DEGREE).convert(lon);
        }
        definition.append(" +pm=").append(lon);
    }
    /*
         * Appends axis directions. This method always format a vertical direction (up or down)
         * even if the coordinate system is two-dimensional, because Proj.4 seems to require it.
         * Also extract axis units in the process.
         */
    // Horizontal at index 0, vertical at index 1.
    final Unit<?>[] units = new Unit<?>[2];
    boolean validCS = true;
    definition.append(' ').append(Proj4Factory.AXIS_ORDER_PARAM);
    final int dimension = Math.min(cs.getDimension(), 3);
    boolean hasVertical = false;
    for (int i = 0; i < dimension; i++) {
        final CoordinateSystemAxis axis = cs.getAxis(i);
        final AxisDirection dir = axis.getDirection();
        int unitIndex = 0;
        if (!AxisDirections.isCardinal(dir)) {
            if (!AxisDirections.isVertical(dir)) {
                throw new FactoryException(Errors.format(Errors.Keys.UnsupportedAxisDirection_1, dir));
            }
            hasVertical = true;
            unitIndex = 1;
        }
        final Unit<?> old = units[unitIndex];
        units[unitIndex] = axis.getUnit();
        validCS &= (old == null || old.equals(units[unitIndex]));
        definition.appendCodePoint(Character.toLowerCase(dir.name().codePointAt(0)));
    }
    if (!hasVertical && dimension < 3) {
        // Add a UP direction if not already present.
        definition.append('u');
    }
    /*
         * Append units of measurement, then verify the coordinate system validity.
         */
    for (int i = 0; i < units.length; i++) {
        final Unit<?> unit = units[i];
        if (unit != null && !unit.equals(Units.DEGREE) && !unit.equals(Units.METRE)) {
            validCS &= Units.isLinear(unit);
            definition.append(" +");
            // "+vto_meter" parameter.
            if (i == 1)
                definition.append('v');
            definition.append("to_meter=").append(Units.toStandardUnit(unit));
        }
    }
    /*
         * Append the "+towgs84" element if any. This is the last piece of information.
         * Note that the use of a "+towgs84" parameter is an "early binding" approach,
         * which is usually not recommended. But Proj4 works that way.
         */
    if (validCS) {
        if (datum instanceof DefaultGeodeticDatum) {
            for (final BursaWolfParameters bwp : ((DefaultGeodeticDatum) datum).getBursaWolfParameters()) {
                if (Utilities.equalsIgnoreMetadata(CommonCRS.WGS84.datum(), bwp.getTargetDatum())) {
                    definition.append(" +towgs84=").append(bwp.tX).append(',').append(bwp.tY).append(',').append(bwp.tZ);
                    if (!bwp.isTranslation()) {
                        definition.append(',').append(bwp.rX).append(',').append(bwp.rY).append(',').append(bwp.rZ).append(',').append(bwp.dS);
                    }
                    break;
                }
            }
        }
        return definition.toString();
    }
    /*
         * If we reach this point, we detected a coordinate system that we can not format as a
         * Proj.4 definition string. Format an error message with axis directions and units.
         */
    definition.setLength(0);
    definition.append('(');
    for (int i = 0; i < units.length; i++) {
        final CoordinateSystemAxis axis = cs.getAxis(i);
        if (i != 0)
            definition.append(", ");
        definition.append(axis.getUnit()).append(' ').append(Types.getCodeName(axis.getDirection()));
    }
    throw new FactoryException(Errors.format(Errors.Keys.IllegalCoordinateSystem_1, definition.append(')')));
}