Examples of Ellipsoid

gistoolkit.projection.Ellipsoid
Class to contain the parameters associated with an elipsoid used in modeling the lat long measurements of the earth.
org.jmol.shapespecial.Ellipsoids.Ellipsoid
org.opengis.referencing.datum.Ellipsoid
geospatial.org/files/?artifact_id=6716">Abstract specification 2.0 @author Martin Desruisseaux (IRD) @since GeoAPI 1.0
org.osgeo.proj4j.datum.Ellipsoid
A class representing a geographic reference ellipsoid (or more correctly an oblate spheroid), used to model the shape of the surface of the earth.
An oblate spheroid is a geometric surface formed by the rotation of an ellipse about its minor axis. In geodesy this is used as a convenient approximation to the geoid, the true shape of the earth's surface.
An ellipsoid is defined by the following parameters:
- a, the equatorial radius or semi-major axis (see {@link #getA()})
and one of:
- b, the polar radius or semi-minor axis (see {@link #getB()})
- f, the reciprocal flattening (f = (a - b) / a)
In order to be used as a model of the geoid, the exact positioning of an ellipsoid relative to the geoid surface needs to be specified. This is provided by means of a geodetic {@link Datum}.
Notable ellipsoids in common use include {@link #CLARKE_1866}, {@link #GRS80}, and {@link #WGS84}. @see Datum

Examples of org.opengis.referencing.datum.Ellipsoid

                     * datum shift methods, since the conversion from ellipsoid to geocentric
                     * for "geocentric translations" is implicit in the EPSG database. Even in
                     * the case of Molodenski transforms, the axis length to set are the same.
                     */
                    if (isBursaWolf) try {
                        Ellipsoid ellipsoid = CRSUtilities.getHeadGeoEllipsoid(sourceCRS);
                        if (ellipsoid != null) {
                            final Unit axisUnit = ellipsoid.getAxisUnit();
                            parameters.parameter("src_semi_major").setValue(ellipsoid.getSemiMajorAxis(), axisUnit);
                            parameters.parameter("src_semi_minor").setValue(ellipsoid.getSemiMinorAxis(), axisUnit);
                            parameters.parameter("src_dim").setValue(sourceCRS.getCoordinateSystem().getDimension());
                        }
                        ellipsoid = CRSUtilities.getHeadGeoEllipsoid(targetCRS);
                        if (ellipsoid != null) {
                            final Unit axisUnit = ellipsoid.getAxisUnit();
                            parameters.parameter("tgt_semi_major").setValue(ellipsoid.getSemiMajorAxis(), axisUnit);
                            parameters.parameter("tgt_semi_minor").setValue(ellipsoid.getSemiMinorAxis(), axisUnit);
                            parameters.parameter("tgt_dim").setValue(targetCRS.getCoordinateSystem().getDimension());
                        }
                    } catch (ParameterNotFoundException exception) {
                        result.close();
                        throw new FactoryException(Errors.format(

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Examples of org.opengis.referencing.datum.Ellipsoid


  protected abstract Datum generateDatum(String code) throws FactoryException;


  public Ellipsoid createEllipsoid(String code) throws FactoryException {
    final String key = toKey(code);
    Ellipsoid ellipsoid = (Ellipsoid) cache.get(key);
    if (ellipsoid == null) {
      try {
        cache.writeLock(key);
        ellipsoid = (Ellipsoid) cache.peek(key);
        if (ellipsoid == null) {

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Examples of org.opengis.referencing.datum.Ellipsoid

      // is it WGS84?
      if (datumName.trim().equalsIgnoreCase("WGS84"))
        return DefaultGeodeticDatum.WGS84;


      // ELLIPSOID
      final Ellipsoid ellipsoid = createEllipsoid(unit, metadata);


      // PRIME MERIDIAN
      // lookup the Prime Meridian.
      final PrimeMeridian primeMeridian = createPrimeMeridian(metadata,
          unit);

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Examples of org.osgeo.proj4j.datum.Ellipsoid

  
  public Ellipsoid getEllipsoid()
  {
    if (ellipsoid != null)
        return ellipsoid;
    return new Ellipsoid("user", a, es, "User-defined");
  }

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Examples of org.osgeo.proj4j.datum.Ellipsoid

    Proj4Keyword.checkUnsupported(params.keySet());
    DatumParameters datumParam = new DatumParameters();
    parseDatum(params, datumParam);
    parseEllipsoid(params, datumParam);
    Datum datum = datumParam.getDatum();
    Ellipsoid ellipsoid = datum.getEllipsoid(); 
    // TODO: this makes a difference - why?
    // which is better?
//    Ellipsoid ellipsoid = datumParam.getEllipsoid(); 
    Projection proj = parseProjection(params, ellipsoid);
    return new CoordinateReferenceSystem(name, args, datum, proj);

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Examples of org.osgeo.proj4j.datum.Ellipsoid

    * null) a = Double.parseDouble(s);
    */


   String code = (String) params.get(Proj4Keyword.ellps);
   if (code != null) {
     Ellipsoid ellipsoid = registry.getEllipsoid(code);
     if (ellipsoid == null)
       throw new InvalidValueException("Unknown ellipsoid: " + code);
     datumParam.setEllipsoid(ellipsoid);
   }

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