Class CassiniSoldner

All Implemented Interfaces:
Serializable, Parameterized, LenientComparable, org.opengis.referencing.operation.MathTransform, org.opengis.referencing.operation.MathTransform2D
Direct Known Subclasses:
CassiniSoldner.Spherical

public class CassiniSoldner extends MeridianArcBased
Cassini-Soldner projection (EPSG codes 9806 and 9833). See the following references for an overview: The ellipsoidal form of this projection is suitable only within a few degrees (3° or 4° of longitude) to either side of the central meridian.
Since:
1.1
Version:
1.2
See Also:
  • Field Details

    • serialVersionUID

      private static final long serialVersionUID
      For cross-version compatibility.
      See Also:
    • VANUA_LATITUDE

      private static final double VANUA_LATITUDE
      The latitude of
      invalid reference
      #VANUA
      variant (16°15′S) in radians.
      See Also:
    • variant

      private final CassiniSoldner.Variant variant
      The type of Cassini-Soldner projection. Possible values are: Other cases may be added in the future.
    • M0

      private final double M0
      Meridional distance M from equator to latitude of origin φ₀. This parameter is explicit only for the hyperbolic variants. The standard variant does not need it because M0 is subtracted in the denormalization matrix.
  • Constructor Details

    • CassiniSoldner

      public CassiniSoldner(org.opengis.referencing.operation.OperationMethod method, Parameters parameters)
      Creates a Cassini-Soldner projection from the given parameters. The method argument can be the description of one of the following:
      • "Cassini-Soldner".
      • "Hyperbolic Cassini-Soldner".
      Parameters:
      method - description of the projection parameters.
      parameters - the parameter values of the projection to create.
    • CassiniSoldner

      CassiniSoldner(Initializer initializer)
      Creates a new Cassini-Soldner projection from the given initializer.
    • CassiniSoldner

      CassiniSoldner(CassiniSoldner other)
      Creates a new projection initialized to the same parameters than the given one.
  • Method Details

    • initializer

      @Workaround(library="JDK", version="1.7") private static Initializer initializer(org.opengis.referencing.operation.OperationMethod method, Parameters parameters)
      Work around for RFE #4093999 in Sun's bug database ("Relax constraint on placement of this()/super() call in constructors").
    • getInternalParameterNames

      final String[] getInternalParameterNames()
      Returns the names of additional internal parameters which need to be taken in account when comparing two CassiniSoldner projections or formatting them in debug mode.
      Overrides:
      getInternalParameterNames in class NormalizedProjection
    • getInternalParameterValues

      final double[] getInternalParameterValues()
      Returns the values of additional internal parameters which need to be taken in account when comparing two CassiniSoldner projections or formatting them in debug mode.
      Overrides:
      getInternalParameterValues in class NormalizedProjection
    • createMapProjection

      public org.opengis.referencing.operation.MathTransform createMapProjection(org.opengis.referencing.operation.MathTransformFactory factory) throws org.opengis.util.FactoryException
      Returns the sequence of normalizationthisdenormalization transforms as a whole. The transform returned by this method expects (longitude, latitude) coordinates in degrees and returns (x,y) coordinates in metres. The non-linear part of the returned transform will be this transform, except if the ellipsoid is spherical. In the latter case, this transform may be replaced by a simplified implementation.
      Overrides:
      createMapProjection in class NormalizedProjection
      Parameters:
      factory - the factory to use for creating the transform.
      Returns:
      the map projection from (λ,φ) to (x,y) coordinates.
      Throws:
      org.opengis.util.FactoryException - if an error occurred while creating a transform.
      See Also:
    • transform

      public org.opengis.referencing.operation.Matrix transform(double[] srcPts, int srcOff, double[] dstPts, int dstOff, boolean derivate) throws ProjectionException
      Projects the specified (λ,φ) coordinates (units in radians) and stores the result in dstPts. In addition, opportunistically computes the projection derivative if derivate is true. The results must be multiplied by the denormalization matrix before to get linear distances.
      Specified by:
      transform in class NormalizedProjection
      Parameters:
      srcPts - the array containing the source point coordinates, as (longitude, latitude) angles in radians.
      srcOff - the offset of the single coordinate tuple to be converted in the source array.
      dstPts - the array into which the converted coordinates is returned (may be the same than srcPts). Coordinates will be expressed in a dimensionless unit, as a linear distance on a unit sphere or ellipse.
      dstOff - the offset of the location of the converted coordinates that is stored in the destination array.
      derivate - true for computing the derivative, or false if not needed.
      Returns:
      the matrix of the projection derivative at the given source position, or null if the derivate argument is false.
      Throws:
      ProjectionException - if the coordinates cannot be converted.
      See Also:
    • inverseTransform

      protected void inverseTransform(double[] srcPts, int srcOff, double[] dstPts, int dstOff) throws ProjectionException
      Converts the specified (x,y) coordinates and stores the result in dstPts (angles in radians).
      Specified by:
      inverseTransform in class NormalizedProjection
      Parameters:
      srcPts - the array containing the source point coordinates, as linear distance on a unit sphere or ellipse.
      srcOff - the offset of the point to be converted in the source array.
      dstPts - the array into which the converted point coordinates is returned (may be the same than srcPts). Coordinates will be (longitude, latitude) angles in radians.
      dstOff - the offset of the location of the converted point that is stored in the destination array.
      Throws:
      ProjectionException - if the point cannot be converted.