org.geotools.referencing.operation.projection
Class CassiniSoldner
java.lang.Object
org.geotools.referencing.wkt.Formattable
org.geotools.referencing.operation.transform.AbstractMathTransform
org.geotools.referencing.operation.projection.MapProjection
org.geotools.referencing.operation.projection.CassiniSoldner
- All Implemented Interfaces:
- java.io.Serializable, org.opengis.referencing.operation.MathTransform, org.opengis.referencing.operation.MathTransform2D
public class CassiniSoldner
- extends MapProjection
Cassini-Soldner Projection (EPSG code 9806).
The Cassini-Soldner Projection is the ellipsoidal version of the Cassini
projection for the sphere. It is not conformal but as it is relatively simple
to construct it was extensively used in the last century and is still useful
for mapping areas with limited longitudinal extent. It has now largely
been replaced by the conformal Transverse Mercator which it resembles. Like this,
it has a straight central meridian along which the scale is true, all other
meridians and parallels are curved, and the scale distortion increases
rapidly with increasing distance from the central meridian.
- See Also:
- Serialized Form
Fields inherited from class org.geotools.referencing.operation.projection.MapProjection |
centralMeridian, en0, en1, en2, en3, en4, excentricity, excentricitySquared, falseEasting, falseNorthing, globalScale, isSpherical, latitudeOfOrigin, LOGGER, scaleFactor, semiMajor, semiMinor |
Constructor Summary |
protected |
CassiniSoldner(org.opengis.parameter.ParameterValueGroup values)
|
Method Summary |
org.opengis.parameter.ParameterDescriptorGroup |
getParameterDescriptors()
Returns the parameter descriptors for this map projection. |
protected java.awt.geom.Point2D |
inverseTransformNormalized(double x,
double y,
java.awt.geom.Point2D ptDst)
Transforms the specified (x,y) coordinate
and stores the result in ptDst . |
protected java.awt.geom.Point2D |
transformNormalized(double lam,
double phi,
java.awt.geom.Point2D ptDst)
Transforms the specified (x,y) coordinate (units in radians)
and stores the result in ptDst (linear distance on a unit sphere). |
Methods inherited from class org.geotools.referencing.operation.projection.MapProjection |
equals, getParameterValues, getSourceDimensions, getTargetDimensions, getToleranceForAssertions, hashCode, inv_mlfn, inverse, mlfn, resetWarnings, transform, transform, transform |
Methods inherited from class org.geotools.referencing.operation.transform.AbstractMathTransform |
createTransformedShape, derivative, derivative, ensureNonNull, formatWKT, getName, isIdentity, needCopy, rollLongitude, transform, transform, transform |
Methods inherited from class java.lang.Object |
clone, finalize, getClass, notify, notifyAll, wait, wait, wait |
Methods inherited from interface org.opengis.referencing.operation.MathTransform2D |
createTransformedShape, derivative |
Methods inherited from interface org.opengis.referencing.operation.MathTransform |
derivative, isIdentity, toWKT, transform, transform, transform |
CassiniSoldner
protected CassiniSoldner(org.opengis.parameter.ParameterValueGroup values)
throws org.opengis.parameter.ParameterNotFoundException
- Throws:
org.opengis.parameter.ParameterNotFoundException
getParameterDescriptors
public org.opengis.parameter.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()
inverseTransformNormalized
protected java.awt.geom.Point2D inverseTransformNormalized(double x,
double y,
java.awt.geom.Point2D ptDst)
throws ProjectionException
- Transforms the specified (x,y) coordinate
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.
transformNormalized
protected java.awt.geom.Point2D transformNormalized(double lam,
double phi,
java.awt.geom.Point2D ptDst)
throws ProjectionException
- Transforms the specified (x,y) coordinate (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.
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