Package org.geotools.referencing.operation.projection

Class WorldVanDerGrintenI

Object

Formattable

AbstractMathTransform

MapProjection

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

Nested Classes

Modifier and Type	Class	Description
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, SKIP_SANITY_CHECKS

Fields inherited from class Formattable

SINGLE_LINE

Constructor Summary

Constructors

Constructor	Description
WorldVanDerGrintenI(ParameterValueGroup values)	Constructs a new map projection from the supplied parameters.
WorldVanDerGrintenI(ParameterValueGroup values, Collection<GeneralParameterDescriptor> expected)

Method Summary

Modifier and Type	Method	Description
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, normalizeAngle, 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 MathTransform

derivative, isIdentity, toWKT, transform, transform, transform

Methods inherited from interface MathTransform2D

createTransformedShape, derivative

Constructor Details

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 Details

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.