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ObjectFormattable
AbstractMathTransform
MapProjection
WinkelTripel
public class WinkelTripel
Winkel Tripel and Hammer Aitoff projection References:
Nested Class Summary | |
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static class |
WinkelTripel.AitoffProvider
The math transform provider for the Aitoff projection (not part of the EPSG database). |
static class |
WinkelTripel.WinkelProvider
The math transform provider for the Winkle Tripel projection projection (not part of the EPSG database). |
Nested classes/interfaces inherited from class MapProjection |
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MapProjection.AbstractProvider |
Field Summary |
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Fields inherited from class MapProjection |
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centralMeridian, en0, en1, en2, en3, en4, excentricity, excentricitySquared, falseEasting, falseNorthing, globalScale, invertible, isSpherical, latitudeOfOrigin, LOGGER, scaleFactor, semiMajor, semiMinor |
Fields inherited from class Formattable |
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SINGLE_LINE |
Constructor Summary | |
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protected |
WinkelTripel(WinkelTripel.ProjectionMode mode,
ParameterDescriptorGroup descriptors,
ParameterValueGroup parameters)
Constructs a new map projection from the supplied parameters. |
Method Summary | |
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boolean |
equals(Object object)
Compares the specified object with this map projection for equality. |
ParameterDescriptorGroup |
getParameterDescriptors()
Returns the parameter descriptors for this map projection. |
int |
hashCode()
Returns a hash value for this projection. |
protected Point2D |
inverseTransformNormalized(double x,
double y,
Point2D ptDst)
Transforms the specified coordinate 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 |
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checkReciprocal, getParameterValues, getSourceDimensions, getTargetDimensions, getToleranceForAssertions, inv_mlfn, inverse, mlfn, orthodromicDistance, resetWarnings, transform, transform, transform |
Methods inherited from class AbstractMathTransform |
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createTransformedShape, derivative, derivative, ensureNonNull, formatWKT, getName, isIdentity, needCopy, rollLongitude, transform, transform, transform |
Methods inherited from class Formattable |
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cleanupThreadLocals, toString, toWKT, toWKT, toWKT, toWKT |
Methods inherited from class Object |
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clone, finalize, getClass, notify, notifyAll, wait, wait, wait |
Methods inherited from interface MathTransform2D |
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createTransformedShape, derivative |
Methods inherited from interface MathTransform |
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derivative, isIdentity, toWKT, transform, transform, transform |
Constructor Detail |
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protected WinkelTripel(WinkelTripel.ProjectionMode mode, ParameterDescriptorGroup descriptors, ParameterValueGroup parameters) throws ParameterNotFoundException
parameters
- The parameter values in standard units.
ParameterNotFoundException
- if a mandatory parameter is missing.Method Detail |
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public ParameterDescriptorGroup getParameterDescriptors()
MapProjection.getParameterValues()
, as well as arguments checking.
getParameterDescriptors
in class MapProjection
null
.OperationMethod.getParameters()
protected Point2D transformNormalized(double lam, double phi, Point2D ptDst) throws ProjectionException
ptDst
(linear distance
on a unit sphere).
transformNormalized
in class MapProjection
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.
lambda
, phi
)
and storing the result in ptDst
.
ProjectionException
- if the point can't be transformed.protected Point2D inverseTransformNormalized(double x, double y, Point2D ptDst) throws ProjectionException
MapProjection
ptDst
. This method
returns longitude as x values in the range [-PI..PI]
and latitude as
y values in the range [-PI/2..PI/2]
. It will be checked by the caller,
so this method doesn't need to performs this check.
Input coordinates have the MapProjection.falseEasting
and MapProjection.falseNorthing
removed and are
divided by MapProjection.globalScale
before this method is invoked. After this method is invoked,
the MapProjection.centralMeridian
is added to the x
results in ptDst
. This means
that projections that implement this method are performed on an ellipse (or sphere) with a
semi-major axis of 1.
In PROJ.4, the same standardization,
described above, is handled by pj_inv.c
. Therefore when porting projections
from PROJ.4, the inverse transform equations can be used directly here with minimal
change. In the equations of Snyder, MapProjection.falseEasting
, MapProjection.falseNorthing
and
MapProjection.scaleFactor
are usually not given. When implementing these equations here, you
will not need to add the MapProjection.centralMeridian
to the output longitude or remove the
MapProjection.semiMajor
(a or R).
inverseTransformNormalized
in class MapProjection
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.
x
, y
and storing the result in ptDst
.
ProjectionException
- if the point can't be transformed.public int hashCode()
hashCode
in class MapProjection
public boolean equals(Object object)
equals
in class MapProjection
object
- The object to compare with this transform.
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.
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