Class PerspectiveProjection

java.lang.Object

org.locationtech.proj4j.proj.Projection

org.locationtech.proj4j.proj.PerspectiveProjection

All Implemented Interfaces:

Serializable, Cloneable

public class PerspectiveProjection
extends Projection

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
private double	cg
private double	cw
private static final double	EPS10
private static final int	EQUIT
private double	h
private double	height
private int	mode
private static final int	N_POLE
private static final int	OBLIQ
private double	p
private double	pcosph0
private double	pfact
private double	pn1
private double	psinph0
private double	rp
private static final int	S_POLE
private double	sg
private double	sw
private int	tilt

Fields inherited from class Projection

a, alpha, DTR, e, ellipsoid, es, falseEasting, falseNorthing, fromMetres, geocentric, lonc, maxLatitude, maxLongitude, minLatitude, minLongitude, name, one_es, projectionLatitude, projectionLatitude1, projectionLatitude2, projectionLongitude, rone_es, RTD, scaleFactor, spherical, totalScale, trueScaleLatitude, unit

Constructor Summary

Constructors

Constructor	Description
PerspectiveProjection()

Method Summary

Modifier and Type	Method	Description
boolean	hasInverse()	Tests whether this projection has an inverse.
void	initialize()	Initialize the projection.
ProjCoordinate	project(double lplam, double lpphi, ProjCoordinate xy)	Computes the projection of a given point (i.e.
String	toString()

Methods inherited from class Projection

clone, equals, getAlpha, getAxisOrder, getEllipsoid, getEPSGCode, getEquatorRadius, getFalseEasting, getFalseNorthing, getFromMetres, getHeightOfOrbit, getLonC, getMaxLatitude, getMaxLatitudeDegrees, getMaxLongitude, getMaxLongitudeDegrees, getMinLatitude, getMinLatitudeDegrees, getMinLongitude, getMinLongitudeDegrees, getName, getPrimeMeridian, getPROJ4Description, getProjectionLatitude, getProjectionLatitude1, getProjectionLatitude1Degrees, getProjectionLatitude2, getProjectionLatitude2Degrees, getProjectionLatitudeDegrees, getProjectionLongitude, getProjectionLongitudeDegrees, getScaleFactor, getSouthernHemisphere, getTrueScaleLatitude, getTrueScaleLatitudeDegrees, getUnits, hashCode, inside, inverseProject, inverseProjectRadians, isConformal, isEqualArea, isGeographic, isRectilinear, normalizeLongitude, normalizeLongitudeRadians, parallelsAreParallel, project, projectInverse, projectRadians, setAlpha, setAlphaDegrees, setAxisOrder, setEllipsoid, setFalseEasting, setFalseNorthing, setFromMetres, setGamma, setGammaDegrees, setHeightOfOrbit, setLonC, setLonCDegrees, setMaxLatitude, setMaxLongitude, setMaxLongitudeDegrees, setMinLatitude, setMinLongitude, setMinLongitudeDegrees, setName, setNoUoff, setPrimeMeridian, setProjectionLatitude, setProjectionLatitude1, setProjectionLatitude1Degrees, setProjectionLatitude2, setProjectionLatitude2Degrees, setProjectionLatitudeDegrees, setProjectionLongitude, setProjectionLongitudeDegrees, setRadius, setScaleFactor, setSouthernHemisphere, setTrueScaleLatitude, setTrueScaleLatitudeDegrees, setUnits

Methods inherited from class Object

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

Field Details

height

private double height

psinph0

private double psinph0

pcosph0

private double pcosph0

p

private double p

rp

private double rp

pn1

private double pn1

pfact

private double pfact

h

private double h

cg

private double cg

sg

private double sg

sw

private double sw

cw

private double cw

mode

private int mode

tilt

private int tilt

EPS10

private static final double EPS10

See Also:

• Constant Field Values

N_POLE

private static final int N_POLE

See Also:

• Constant Field Values

S_POLE

private static final int S_POLE

See Also:

• Constant Field Values

EQUIT

private static final int EQUIT

See Also:

• Constant Field Values

OBLIQ

private static final int OBLIQ

See Also:

• Constant Field Values

Constructor Details

PerspectiveProjection

public PerspectiveProjection()

Method Details

project

public ProjCoordinate project(double lplam,
 double lpphi,
 ProjCoordinate xy)

Description copied from class: Projection

Computes the projection of a given point (i.e. from geographics to projection space). This should be overridden for all projections.

Overrides:

project in class Projection

Parameters:

lplam - the geographic x ordinate (in radians)

lpphi - the geographic y ordinatee (in radians)

xy - the projected coordinate (in coordinate system units)

Returns:

the target coordinate

hasInverse

public boolean hasInverse()

Description copied from class: Projection

Tests whether this projection has an inverse. If this method returns true then the Projection.inverseProject(ProjCoordinate, ProjCoordinate) and Projection.inverseProjectRadians(ProjCoordinate, ProjCoordinate) methods will return meaningful results.

Overrides:

hasInverse in class Projection

Returns:

true if this projection has an inverse

initialize

public void initialize()

Description copied from class: Projection

Initialize the projection. This should be called after setting parameters and before using the projection. This is for performance reasons as initialization may be expensive.

Overrides:

initialize in class Projection

toString

public String toString()

Overrides:

toString in class Projection