org.openstreetmap.josm.data.projection.proj

Class LambertConformalConic

java.lang.Object

org.openstreetmap.josm.data.projection.proj.AbstractProj

org.openstreetmap.josm.data.projection.proj.LambertConformalConic

All Implemented Interfaces:

Proj

public class LambertConformalConic
extends AbstractProj

Implementation of the Lambert Conformal Conic projection.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	LambertConformalConic.Parameters
static class	LambertConformalConic.Parameters1SP
static class	LambertConformalConic.Parameters2SP

Field Summary

Fields

Modifier and Type	Field and Description
protected Ellipsoid	ellps
protected static double	epsilon precision in iterative schema
protected double	f projection factor
protected double	n projection exponent
private LambertConformalConic.Parameters	params
protected double	r0 radius of the parallel of latitude of the false origin (2SP) or at natural origin (1SP)

Fields inherited from class org.openstreetmap.josm.data.projection.proj.AbstractProj

e, e2, en0, en1, en2, en3, en4, spherical

Constructor Summary

Constructors

Constructor and Description
LambertConformalConic()

Method Summary

Modifier and Type	Method and Description
Bounds	getAlgorithmBounds() Return the bounds where this projection is applicable.
java.lang.String	getName() Replies a human readable name of this projection.
LambertConformalConic.Parameters	getParameters()
java.lang.String	getProj4Id() Replies the Proj.4 identifier.
void	initialize(ProjParameters params) Initialize the projection using the provided parameters.
private void	initialize1SP(double lat0) Initialize for LCC with 1 standard parallel.
private void	initialize2SP(double lat0, double lat1, double lat2) Initialize for LCC with 2 standard parallels.
double[]	invproject(double east, double north) Convert east/north to lat/lon.
protected double	m(double latRad) auxiliary function m
double[]	project(double phi, double lambda) Convert lat/lon to east/north.
protected double	t(double latRad) auxiliary function t

Methods inherited from class org.openstreetmap.josm.data.projection.proj.AbstractProj

cphi2, inv_mlfn, isGeographic, mlfn, msfn, tsfn

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

ellps

protected Ellipsoid ellps

params

private LambertConformalConic.Parameters params

n

protected double n

projection exponent

f

protected double f

projection factor

r0

protected double r0

radius of the parallel of latitude of the false origin (2SP) or at natural origin (1SP)

epsilon

protected static final double epsilon

precision in iterative schema

See Also:

Constant Field Values

Constructor Detail

LambertConformalConic

public LambertConformalConic()

Method Detail

initialize

public void initialize(ProjParameters params)
                throws ProjectionConfigurationException

Description copied from interface: Proj

Initialize the projection using the provided parameters.

Specified by:

initialize in interface Proj

Overrides:

initialize in class AbstractProj

Parameters:

params - The projection parameters

Throws:

ProjectionConfigurationException - in case parameters are not suitable

initialize2SP

private void initialize2SP(double lat0,
                           double lat1,
                           double lat2)

Initialize for LCC with 2 standard parallels.

Parameters:

lat0 - latitude of false origin (in degrees)

lat1 - latitude of first standard parallel (in degrees)

lat2 - latitude of second standard parallel (in degrees)

initialize1SP

private void initialize1SP(double lat0)

Initialize for LCC with 1 standard parallel.

Parameters:

lat0 - latitude of natural origin (in degrees)

t

protected double t(double latRad)

auxiliary function t

Parameters:

latRad - latitude in radians

Returns:

result

m

protected double m(double latRad)

auxiliary function m

Parameters:

latRad - latitude in radians

Returns:

result

getName

public java.lang.String getName()

Description copied from interface: Proj

Replies a human readable name of this projection.

Returns:

The projection name. must not be null.

getProj4Id

public java.lang.String getProj4Id()

Description copied from interface: Proj

Replies the Proj.4 identifier.

Returns:

The Proj.4 identifier (as reported by cs2cs -lp). If no id exists, return null.

project

public double[] project(double phi,
                        double lambda)

Description copied from interface: Proj

Convert lat/lon to east/north.

Parameters:

phi - the latitude in radians

lambda - the longitude in radians

Returns:

array of length 2, containing east and north value in meters, divided by the semi major axis of the ellipsoid.

invproject

public double[] invproject(double east,
                           double north)

Description copied from interface: Proj

Convert east/north to lat/lon.

Parameters:

east - east value in meters, divided by the semi major axis of the ellipsoid

north - north value in meters, divided by the semi major axis of the ellipsoid

Returns:

array of length 2, containing lat and lon in radians.

getParameters

public final LambertConformalConic.Parameters getParameters()

getAlgorithmBounds

public Bounds getAlgorithmBounds()

Description copied from interface: Proj

Return the bounds where this projection is applicable. This is a fallback for when the projection bounds are not specified explicitly. In this area, the round trip lat/lon -> east/north -> lat/lon should return the starting value with small error. In addition, regions with extreme distortions should be excluded, if possible. It need not be the absolute maximum, but rather an area that is safe to display in JOSM and contain everything that one would expect to use.

Returns:

the bounds where this projection is applicable, null if unknown