org.geotools.referencing.operation.projection

Class Orthographic

Object

Formattable

AbstractMathTransform

MapProjection

Orthographic

All Implemented Interfaces:

Serializable, MathTransform, MathTransform2D

Direct Known Subclasses:

ObliqueOrthographic, PolarOrthographic

public abstract class Orthographic
extends MapProjection

Orthographic Projection. This is a perspective azimuthal (planar) projection that is neither conformal nor equal-area. It resembles a globe and only one hemisphere can be seen at a time, since it is a perspectiove projection from infinite distance. While not useful for accurate measurements, this projection is useful for pictorial views of the world. Only the spherical form is given here.

NOTE: formulae used below are from a port, to java, of the proj package of the USGS survey. USGS work is acknowledged here.

References:

• Proj-4.4.7 available at www.remotesensing.org/proj
  Relevant files are: PJ_ortho.c, pj_fwd.c and pj_inv.c.
• John P. Snyder (Map Projections - A Working Manual, U.S. Geological Survey Professional Paper 1395, 1987)

Since:

2.1

Author:

Rueben Schulz

See Also:

Orthographic projection on mathworld.wolfram.com, "Orthographic" on www.remotesensing.org, Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Orthographic.Provider The math transform provider for a Orthographic 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

Modifier	Constructor and Description
protected	Orthographic(ParameterValueGroup parameters) Creates a transform from the specified group of parameter values.

Method Summary

Modifier and Type	Method and Description
ParameterDescriptorGroup	getParameterDescriptors() Returns the parameter descriptors for this map projection.

Methods inherited from class MapProjection

checkReciprocal, equals, getParameterValues, getSourceDimensions, getTargetDimensions, getToleranceForAssertions, hashCode, inv_mlfn, inverse, inverseTransformNormalized, mlfn, orthodromicDistance, resetWarnings, transform, transform, transform, transformNormalized

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 class Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface MathTransform2D

createTransformedShape, derivative

Methods inherited from interface MathTransform

derivative, isIdentity, toWKT, transform, transform, transform

Constructor Detail

Orthographic

protected Orthographic(ParameterValueGroup parameters)
                throws ParameterNotFoundException

Creates a transform from the specified group of parameter values.

Parameters:

parameters - The group of parameter values.

Throws:

ParameterNotFoundException - if a required parameter was not found.

Since:

2.4

Method Detail

getParameterDescriptors

public 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()