Class EckertIV
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- All Implemented Interfaces:
Serializable
,MathTransform
,MathTransform2D
public class EckertIV extends MapProjection
Eckert IV projection- Since:
- 2.7.0
- Author:
- Andrea Aime
- See Also:
- Robinson projection on MathWorld, "Eckert IV" on the Equal Area Maps web site, "Robinson" on RemoteSensing.org, Serialized Form
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Nested Class Summary
Nested Classes Modifier and Type Class Description static class
EckertIV.Provider
The math transform provider for the Eckert IV projection (not part of the EPSG database).-
Nested classes/interfaces inherited from class MapProjection
MapProjection.AbstractProvider
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Field Summary
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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
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Fields inherited from class Formattable
SINGLE_LINE
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Constructor Summary
Constructors Modifier Constructor Description protected
EckertIV(ParameterValueGroup parameters)
Constructs a new map projection from the supplied parameters.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description 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 inptDst
.protected Point2D
transformNormalized(double lam, double phi, Point2D ptDst)
Transforms the specified (λ,φ) coordinates (units in radians) and stores the result inptDst
(linear distance on a unit sphere).-
Methods inherited from class MapProjection
checkReciprocal, equals, getParameterValues, getSourceDimensions, getTargetDimensions, hashCode, inv_mlfn, inverse, mlfn, orthodromicDistance, resetWarnings, transform, transform, transform
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Methods inherited from class AbstractMathTransform
createTransformedShape, derivative, derivative, ensureNonNull, formatWKT, getName, isIdentity, needCopy, normalizeAngle, rollLongitude, transform, transform, transform
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Methods inherited from class Formattable
cleanupThreadLocals, toString, toWKT, toWKT, toWKT, toWKT
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Methods inherited from interface MathTransform
derivative, isIdentity, toWKT, transform, transform, transform
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Methods inherited from interface MathTransform2D
createTransformedShape, derivative
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Constructor Detail
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EckertIV
protected EckertIV(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.
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Method Detail
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getParameterDescriptors
public ParameterDescriptorGroup getParameterDescriptors()
Returns the parameter descriptors for this map projection. This is used for a providing a default implementation ofMapProjection.getParameterValues()
, as well as arguments checking.- Specified by:
getParameterDescriptors
in classMapProjection
- Returns:
- The parameter descriptors for this math transform, or
null
. - See Also:
OperationMethod.getParameters()
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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 inptDst
(linear distance on a unit sphere).- Specified by:
transformNormalized
in classMapProjection
- 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 transformingptSrc
, ornull
. 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 inptDst
. - Throws:
ProjectionException
- if the point can't be transformed.
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inverseTransformNormalized
protected Point2D inverseTransformNormalized(double x, double y, Point2D ptDst) throws ProjectionException
Transforms the specified (x,y) coordinates and stores the result inptDst
.- Specified by:
inverseTransformNormalized
in classMapProjection
- 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 transformingptSrc
, ornull
. Ordinates will be in radians.- Returns:
- the coordinate point after transforming
x
,y
and storing the result inptDst
. - Throws:
ProjectionException
- if the point can't be transformed.
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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 anProjectionException
will be thrown. Subclasses should override this method if they need to relax the tolerance level.- Overrides:
getToleranceForAssertions
in classMapProjection
- 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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