org.geotools.referencing.operation.projection
Class EquatorialStereographic

java.lang.Object
  extended by org.geotools.referencing.wkt.Formattable
      extended by org.geotools.referencing.operation.transform.AbstractMathTransform
          extended by org.geotools.referencing.operation.projection.MapProjection
              extended by org.geotools.referencing.operation.projection.Stereographic
                  extended by org.geotools.referencing.operation.projection.EquatorialStereographic
All Implemented Interfaces:
java.io.Serializable, org.opengis.referencing.operation.MathTransform, org.opengis.referencing.operation.MathTransform2D

public class EquatorialStereographic
extends Stereographic

The USGS equatorial case of the stereographic projection. This is a special case of oblique stereographic projection for latitude of origin == 0.0.

Since:
2.4
Version:
$Id: EquatorialStereographic.java 30641 2008-06-12 17:42:27Z acuster $
Author:
André Gosselin, Martin Desruisseaux (PMO, IRD), Rueben Schulz
See Also:
Serialized Form

Nested Class Summary
 
Nested classes/interfaces inherited from class org.geotools.referencing.operation.projection.Stereographic
Stereographic.Provider
 
Nested classes/interfaces inherited from class org.geotools.referencing.operation.projection.MapProjection
MapProjection.AbstractProvider
 
Field Summary
 
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
 
Fields inherited from class org.geotools.referencing.wkt.Formattable
SINGLE_LINE
 
Constructor Summary
protected EquatorialStereographic(org.opengis.parameter.ParameterValueGroup parameters)
          Constructs an equatorial stereographic projection (EPSG equations).
 
Method Summary
protected  double getToleranceForAssertions(double longitude, double latitude)
          Maximal error (in metres) tolerated for assertions, if enabled.
protected  java.awt.geom.Point2D inverseTransformNormalized(double x, double y, java.awt.geom.Point2D ptDst)
          Transforms the specified (x,y) coordinates and stores the result in ptDst.
protected  java.awt.geom.Point2D transformNormalized(double x, double y, java.awt.geom.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 org.geotools.referencing.operation.projection.Stereographic
equals, getParameterDescriptors
 
Methods inherited from class org.geotools.referencing.operation.projection.MapProjection
getParameterValues, getSourceDimensions, getTargetDimensions, 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 org.geotools.referencing.wkt.Formattable
cleanupThreadLocals, toString, toWKT, toWKT, toWKT
 
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
 

Constructor Detail

EquatorialStereographic

protected EquatorialStereographic(org.opengis.parameter.ParameterValueGroup parameters)
                           throws org.opengis.parameter.ParameterNotFoundException
Constructs an equatorial stereographic projection (EPSG equations).

Parameters:
parameters - The group of parameter values.
Throws:
org.opengis.parameter.ParameterNotFoundException - if a required parameter was not found.
Method Detail

transformNormalized

protected java.awt.geom.Point2D transformNormalized(double x,
                                                    double y,
                                                    java.awt.geom.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).

Parameters:
x - The longitude of the coordinate, in radians.
y - 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 java.awt.geom.Point2D inverseTransformNormalized(double x,
                                                           double y,
                                                           java.awt.geom.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.

getToleranceForAssertions

protected double getToleranceForAssertions(double longitude,
                                           double latitude)
Maximal error (in metres) tolerated for assertions, if enabled.

Overrides:
getToleranceForAssertions in class MapProjection
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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