org.geotools.referencing.operation.projection
Class Mollweide

Object
  extended by Formattable
      extended by AbstractMathTransform
          extended by MapProjection
              extended by Mollweide
All Implemented Interfaces:
Serializable, MathTransform, MathTransform2D

public class Mollweide
extends MapProjection

Mollweide projection

Since:
2.7.0
Author:
Andrea Aime
See Also:
Mollweide, "Mollweide" on Wikipedia, "Mollweide" on RemoteSensing.org, Serialized Form

Nested Class Summary
static class Mollweide.MollweideProvider
          The math transform provider for the Mollweide projection (not part of the EPSG database).
static class Mollweide.WagnerIVProvider
          The math transform provider for the Wagner IV projection (not part of the EPSG database).
static class Mollweide.WagnerVProvider
          The math transform provider for the Wagner V projection (not part of the EPSG database).
 
Nested classes/interfaces inherited from class MapProjection
MapProjection.AbstractProvider
 
Field Summary
 
Fields inherited from class MapProjection
centralMeridian, en0, en1, en2, en3, en4, excentricity, excentricitySquared, falseEasting, falseNorthing, globalScale, invertible, isSpherical, latitudeOfOrigin, LOGGER, scaleFactor, semiMajor, semiMinor
 
Fields inherited from class Formattable
SINGLE_LINE
 
Constructor Summary
protected Mollweide(Mollweide.ProjectionMode mode, ParameterDescriptorGroup descriptors, ParameterValueGroup parameters)
          Constructs a new map projection from the supplied parameters.
 
Method Summary
 boolean equals(Object object)
          Compares the specified object with this map projection for equality.
 ParameterDescriptorGroup getParameterDescriptors()
          Returns the parameter descriptors for this map projection.
protected  double getToleranceForAssertions(double longitude, double latitude)
          Maximal error (in metres) tolerated for assertions, if enabled.
protected  Point2D inverseTransformNormalized(double x, double y, Point2D ptDst)
          Transforms the specified (x,y) coordinates and stores the result in ptDst.
protected  Point2D transformNormalized(double lam, double phi, Point2D ptDst)
          Transforms the specified (λ,φ) coordinates (units in radians) and stores the result in ptDst (linear distance on a unit sphere).
 
Methods inherited from class MapProjection
checkReciprocal, getParameterValues, getSourceDimensions, getTargetDimensions, hashCode, inv_mlfn, inverse, mlfn, orthodromicDistance, resetWarnings, transform, transform, transform
 
Methods inherited from class AbstractMathTransform
createTransformedShape, derivative, derivative, ensureNonNull, formatWKT, getName, isIdentity, needCopy, rollLongitude, transform, transform, transform
 
Methods inherited from class Formattable
cleanupThreadLocals, toString, toWKT, toWKT, toWKT, toWKT
 
Methods inherited from class Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
 
Methods inherited from interface MathTransform2D
createTransformedShape, derivative
 
Methods inherited from interface MathTransform
derivative, isIdentity, toWKT, transform, transform, transform
 

Constructor Detail

Mollweide

protected Mollweide(Mollweide.ProjectionMode mode,
                    ParameterDescriptorGroup descriptors,
                    ParameterValueGroup parameters)
             throws ParameterNotFoundException
Constructs a new map projection from the supplied parameters.

Parameters:
parameters - The parameter values in standard units.
Throws:
ParameterNotFoundException - if a mandatory parameter is missing.
Method Detail

getParameterDescriptors

public ParameterDescriptorGroup getParameterDescriptors()
Returns the parameter descriptors for this map projection. This is used for a providing a default implementation of MapProjection.getParameterValues(), as well as arguments checking.

Specified by:
getParameterDescriptors in class MapProjection
Returns:
The parameter descriptors for this math transform, or null.
See Also:
OperationMethod.getParameters()

transformNormalized

protected Point2D transformNormalized(double lam,
                                      double phi,
                                      Point2D ptDst)
                               throws ProjectionException
Transforms the specified (λ,φ) coordinates (units in radians) and stores the result in ptDst (linear distance on a unit sphere).

Specified by:
transformNormalized in class MapProjection
Parameters:
lam - The longitude of the coordinate, in radians.
phi - The latitude of the coordinate, in radians.
ptDst - the specified coordinate point that stores the result of transforming ptSrc, or null. Ordinates will be in a dimensionless unit, as a linear distance on a unit sphere or ellipse.
Returns:
the coordinate point after transforming (lambda, phi) and storing the result in ptDst.
Throws:
ProjectionException - if the point can't be transformed.

inverseTransformNormalized

protected Point2D inverseTransformNormalized(double x,
                                             double y,
                                             Point2D ptDst)
                                      throws ProjectionException
Transforms the specified (x,y) coordinates and stores the result in ptDst.

Specified by:
inverseTransformNormalized in class MapProjection
Parameters:
x - The easting of the coordinate, linear distance on a unit sphere or ellipse.
y - The northing of the coordinate, linear distance on a unit sphere or ellipse.
ptDst - the specified coordinate point that stores the result of transforming ptSrc, or null. Ordinates will be in radians.
Returns:
the coordinate point after transforming x, y and storing the result in ptDst.
Throws:
ProjectionException - if the point can't be transformed.

equals

public boolean equals(Object object)
Compares the specified object with this map projection for equality.

Overrides:
equals in class MapProjection
Parameters:
object - The object to compare with this transform.
Returns:
true if the given object is a transform of the same class and if, given identical source position, the transformed position would be the equals.

getToleranceForAssertions

protected double getToleranceForAssertions(double longitude,
                                           double latitude)
Description copied from class: MapProjection
Maximal error (in metres) tolerated for assertions, if enabled. When assertions are enabled, every direct projection is followed by an inverse projection, and the result is compared to the original coordinate. If a distance greater than the tolerance level is found, then an ProjectionException will be thrown. Subclasses should override this method if they need to relax the tolerance level.

Overrides:
getToleranceForAssertions in class MapProjection
Parameters:
longitude - The longitude in decimal degrees.
latitude - The latitude in decimal degrees.
Returns:
The tolerance level for assertions, in meters.


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