org.openstreetmap.josm.data.projection.proj

Class LonLat

java.lang.Object

org.openstreetmap.josm.data.projection.proj.LonLat

All Implemented Interfaces:

Proj

public class LonLat
extends java.lang.Object
implements Proj

Simple Lat/Lon (pseudo-)projection.

Field Summary

Fields

Modifier and Type	Field and Description
private double	a

Constructor Summary

Constructors

Constructor and Description
LonLat()

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.
java.lang.String	getProj4Id() Replies the Proj.4 identifier.
void	initialize(ProjParameters params) Initialize the projection using the provided parameters.
double[]	invproject(double east, double north) Convert east/north to lat/lon.
boolean	isGeographic() Return true, if a geographic coordinate reference system is represented.
double[]	project(double latRad, double lonRad) Convert lat/lon to east/north.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.openstreetmap.josm.data.projection.proj.Proj

lonIsLinearToEast

Field Detail

a

private double a

Constructor Detail

LonLat

public LonLat()

Method Detail

getName

public java.lang.String getName()

Description copied from interface: Proj

Replies a human readable name of this projection.

Specified by:

getName in interface Proj

Returns:

The projection name. must not be null.

getProj4Id

public java.lang.String getProj4Id()

Description copied from interface: Proj

Replies the Proj.4 identifier.

Specified by:

getProj4Id in interface Proj

Returns:

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

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

Parameters:

params - The projection parameters

Throws:

ProjectionConfigurationException - in case parameters are not suitable

project

public double[] project(double latRad,
                        double lonRad)

Description copied from interface: Proj

Convert lat/lon to east/north.

Specified by:

project in interface Proj

Parameters:

latRad - the latitude in radians

lonRad - 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.

Specified by:

invproject in interface Proj

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.

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.

Specified by:

getAlgorithmBounds in interface Proj

Returns:

the bounds where this projection is applicable, null if unknown

isGeographic

public boolean isGeographic()

Description copied from interface: Proj

Return true, if a geographic coordinate reference system is represented. I.e. if it returns latitude/longitude values rather than Cartesian east/north coordinates on a flat surface.

Specified by:

isGeographic in interface Proj

Returns:

true, if it is geographic