org.openstreetmap.josm.data.projection.proj

Class SwissObliqueMercator

java.lang.Object

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

org.openstreetmap.josm.data.projection.proj.SwissObliqueMercator

All Implemented Interfaces:

Proj

public class SwissObliqueMercator
extends AbstractProj

Projection for the SwissGrid CH1903 / L03, see Wikipedia article.
Calculations were originally based on simple formula.
August 2010 update to this formula (rigorous formulas).

Field Summary

Fields

Modifier and Type	Field and Description
private double	alpha
private double	b0
private Ellipsoid	ellps
private static double	EPSILON
private double	k
private double	kR
private double	phi0

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
SwissObliqueMercator()

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.
private void	initialize(double lat0)
void	initialize(ProjParameters params) Initialize the projection using the provided parameters.
double[]	invproject(double y, double x) Convert east/north to lat/lon.
double[]	project(double phi, double lambda) Convert lat/lon to east/north.

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

aasin, cphi2, invMlfn, isGeographic, mlfn, msfn, tsfn

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

ellps

private Ellipsoid ellps

kR

private double kR

alpha

private double alpha

b0

private double b0

k

private double k

phi0

private double phi0

EPSILON

private static final double EPSILON

See Also:

Constant Field Values

Constructor Detail

SwissObliqueMercator

public SwissObliqueMercator()

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

initialize

private void initialize(double lat0)

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 y,
                           double x)

Description copied from interface: Proj

Convert east/north to lat/lon.

Parameters:

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

x - 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.

Returns:

the bounds where this projection is applicable, null if unknown