org.geotools.referencing.operation.projection
Class LambertConformal

java.lang.Object
  extended byorg.geotools.referencing.wkt.Formattable
      extended byorg.geotools.referencing.operation.transform.AbstractMathTransform
          extended byorg.geotools.referencing.operation.projection.MapProjection
              extended byorg.geotools.referencing.operation.projection.LambertConformal
All Implemented Interfaces:
org.opengis.referencing.operation.MathTransform, org.opengis.referencing.operation.MathTransform2D, java.io.Serializable
Direct Known Subclasses:
LambertConformal1SP, LambertConformal2SP, LambertConformalBelgium, LambertConformalESRI

public abstract class LambertConformal
extends MapProjection

Lambert Conical Conformal Projection. Areas and shapes are deformed as one moves away from standard parallels. The angles are true in a limited area. This projection is used for the charts of North America.

This implementation provides transforms for three cases of the lambert conic conformal projection:

For the 1SP case the latitude of origin is used as the standard parallel (SP). To use 1SP with a latitude of origin different from the SP, use the 2SP and set the SP1 to the single SP. The "standard_parallel_2" parameter is optional and will be given the same value as "standard_parallel_1" if not set (creating a 1 standard parallel projection).

References:

Since:
2.1
Version:
$Id: LambertConformal.java 17672 2006-01-19 00:25:55Z desruisseaux $
Author:
Andr? Gosselin, Martin Desruisseaux, Rueben Schulz
See Also:
Lambert conformal conic projection on MathWorld, lambert_conic_conformal_1sp, lambert_conic_conformal_2sp, lambert_conic_conformal_2sp_belgium, Serialized Form

Nested Class Summary
 
Nested classes inherited from class org.geotools.referencing.operation.projection.MapProjection
MapProjection.AbstractProvider
 
Field Summary
 
Fields inherited from class org.geotools.referencing.operation.projection.MapProjection
centralMeridian, excentricity, excentricitySquared, falseEasting, falseNorthing, globalScale, isSpherical, latitudeOfOrigin, scaleFactor, semiMajor, semiMinor
 
Constructor Summary
protected LambertConformal(org.opengis.parameter.ParameterValueGroup parameters)
          Constructs a new map projection from the supplied parameters.
 
Method Summary
 boolean equals(java.lang.Object object)
          Compares the specified object with this map projection for equality.
 org.opengis.parameter.ParameterValueGroup getParameterValues()
          Returns the parameter values for this map projection.
 int hashCode()
          Returns a hash value for this 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 .
protected  java.awt.geom.Point2D transformNormalized(double x, double y, java.awt.geom.Point2D ptDst)
          Transforms the specified (x,y) coordinate (units in radians) and stores the result in (linear distance on a unit sphere).
 
Methods inherited from class org.geotools.referencing.operation.projection.MapProjection
getParameterDescriptors, getSourceDimensions, getTargetDimensions, getToleranceForAssertions, inverse, transform, transform, transform
 
Methods inherited from class org.geotools.referencing.operation.transform.AbstractMathTransform
createTransformedShape, derivative, derivative, ensureNonNull, formatWKT, getDimSource, getDimTarget, isIdentity, needCopy, rollLongitude, transform
 
Methods inherited from class org.geotools.referencing.wkt.Formattable
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
 

Constructor Detail

LambertConformal

protected LambertConformal(org.opengis.parameter.ParameterValueGroup parameters)
                    throws org.opengis.parameter.ParameterNotFoundException
Constructs a new map projection from the supplied parameters.

Parameters:
parameters - The parameter values in standard units.
Throws:
org.opengis.parameter.ParameterNotFoundException - if a mandatory parameter is missing.
Method Detail

getParameterValues

public org.opengis.parameter.ParameterValueGroup getParameterValues()
Returns the parameter values for this map projection.

Overrides:
getParameterValues in class MapProjection
Returns:
A copy of the parameter values for this map projection.

transformNormalized

protected java.awt.geom.Point2D transformNormalized(double x,
                                                    double y,
                                                    java.awt.geom.Point2D ptDst)
                                             throws ProjectionException
Transforms the specified (x,y) coordinate (units in radians) and stores the result in (linear distance on a unit sphere).

Specified by:
transformNormalized in class MapProjection
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 , or . Ordinates will be in a dimensionless unit, as a linear distance on a unit sphere or ellipse.
Returns:
the coordinate point after transforming , and storing the result in .
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) coordinate and stores the result in .

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 , or . Ordinates will be in radians.
Returns:
the coordinate point after transforming , and storing the result in .
Throws:
ProjectionException - if the point can't be transformed.

hashCode

public int hashCode()
Returns a hash value for this projection.

Overrides:
hashCode in class MapProjection

equals

public boolean equals(java.lang.Object object)
Compares the specified object with this map projection for equality.

Overrides:
equals in class MapProjection


Copyright © GeoTools. All Rights Reserved.