org.geotools.referencing.operation.projection
Class WorldVanDerGrintenI

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

public class WorldVanDerGrintenI
extends MapProjection

World Van der Grinten I projection. The Van der Grinten I is the most popular Van der Grinten projection and often referenced as the Van der Grinten projection. It is a circular projection that is neither conformal nor equal-area.

Author:
Simon Nyvlt (ars navigandi)
See Also:
Van der Grinten projection on Wikipedia, Serialized Form

Nested Class Summary
static class WorldVanDerGrintenI.Provider
           
 
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
WorldVanDerGrintenI(ParameterValueGroup values)
          Constructs a new map projection from the supplied parameters.
WorldVanDerGrintenI(ParameterValueGroup values, Collection<GeneralParameterDescriptor> expected)
           
 
Method Summary
 ParameterDescriptorGroup getParameterDescriptors()
          Returns the parameter descriptors for this map projection.
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 lambda, 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, equals, getParameterValues, getSourceDimensions, getTargetDimensions, getToleranceForAssertions, 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

WorldVanDerGrintenI

public WorldVanDerGrintenI(ParameterValueGroup values)
                    throws ParameterNotFoundException
Constructs a new map projection from the supplied parameters.

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

WorldVanDerGrintenI

public WorldVanDerGrintenI(ParameterValueGroup values,
                           Collection<GeneralParameterDescriptor> expected)
                    throws ParameterNotFoundException
Throws:
ParameterNotFoundException
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 lambda,
                                      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:
lambda - 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.


Copyright © 1996-2014 Geotools. All Rights Reserved.