Class CassiniSoldner
Object
Formattable
AbstractMathTransform
MapProjection
CassiniSoldner
- All Implemented Interfaces:
Serializable
,MathTransform
,MathTransform2D
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 It has now largely been
replaced by the conformal Transverse Mercator which it resembles.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:
-
Nested Class Summary
Nested ClassesModifier and TypeClassDescriptionstatic class
TheMathTransformProvider
for aCassiniSoldner
projection.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 -
Method Summary
Modifier and TypeMethodDescriptionReturns the parameter descriptors for this map projection.protected Point2D
inverseTransformNormalized
(double x, double y, Point2D ptDst) Transforms the specified (x,y) coordinate and stores the result inptDst
.protected Point2D
transformNormalized
(double lam, double phi, Point2D ptDst) Transforms the specified (x,y) coordinate (units in radians) and stores the result inptDst
(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 interface MathTransform
derivative, isIdentity, toWKT, transform, transform, transform
Methods inherited from interface MathTransform2D
createTransformedShape, derivative
-
Constructor Details
-
CassiniSoldner
- Throws:
ParameterNotFoundException
-
-
Method Details
-
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:
-
inverseTransformNormalized
protected Point2D inverseTransformNormalized(double x, double y, Point2D ptDst) throws ProjectionException Transforms the specified (x,y) coordinate 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.
-
transformNormalized
protected Point2D transformNormalized(double lam, double phi, Point2D ptDst) throws ProjectionException Transforms the specified (x,y) coordinate (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.
-