org.openstreetmap.josm.data.projection.proj

Class Sinusoidal

java.lang.Object

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

org.openstreetmap.josm.data.projection.proj.Sinusoidal

All Implemented Interfaces:

Proj

public class Sinusoidal
extends AbstractProj

Sinusoidal projection (aka. Sanson–Flamsteed, Mercator equal-area projection)

This class has been derived from the implementation of the Geotools project; git 577dd2d, org.geotools.referencing.operation.projection.Sinusoidal at the time of migration.

Field Summary

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
Sinusoidal()

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.
double[]	invproject(double east, double north) 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, initialize, 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

Constructor Detail

Sinusoidal

public Sinusoidal()

Method Detail

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.

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