ucar.unidata.geoloc.projection
Class RotatedLatLon

java.lang.Object
  ucar.unidata.geoloc.ProjectionImpl
      ucar.unidata.geoloc.projection.RotatedLatLon

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, Projection

public class RotatedLatLon
extends ProjectionImpl

Grib 1 projection 10 and Grib 2 projection 1. The Rotated Latitude Longitude projection algorithms that are coded here were given by Tor Christian Bekkvik . The rotated lat/lon projection coordinates are defined in the grid file that need to be converted back to unrotated lat/lon projection coordinates before they can be displayed. The X/Y axis only makes sense in the rotated projection.

Since:

Nov 11, 2008

Author:

rkambic, Tor Christian Bekkvik

See Also:

Serialized Form

Field Summary

Fields inherited from class ucar.unidata.geoloc.ProjectionImpl

ATTR_NAME, atts, defaultMapArea, EARTH_RADIUS, INDEX_LAT, INDEX_LON, INDEX_X, INDEX_Y, isLatLon, name, PI, PI_OVER_2, PI_OVER_4, TOLERANCE

Constructor Summary

RotatedLatLon()
Default Constructor, needed for beans.

RotatedLatLon(double southPoleLat, double southPoleLon, double southPoleAngle)
Constructor.

Method Summary

ProjectionImpl	constructCopy() copy constructor - avoid clone !!
boolean	crossSeam(ProjectionPoint pt1, ProjectionPoint pt2) Unknown usage
boolean	equals(java.lang.Object proj) Returns true if this represents the same Projection as proj.
ProjectionPoint	latLonToProj(LatLonPoint latlon, ProjectionPointImpl destPoint) Transform a "real" longitude and latitude into the rotated longitude (X) and rotated latitude (Y).
static void	main(java.lang.String[] args)
java.lang.String	paramsToString() returns constructor params as a String
LatLonPoint	projToLatLon(ProjectionPoint ppt, LatLonPointImpl destPoint) Transform a rotated longitude (X) and rotated latitude (Y) into a "real" longitude-latitude pair.

Methods inherited from class ucar.unidata.geoloc.ProjectionImpl

addParameter, addParameter, addParameter, clone, getClassName, getDefaultMapArea, getDefaultMapAreaLL, getHeader, getLatLonBoundingBox, getName, getProjectionParameters, getProjectionTypeLabel, isLatLon, latLonToProj, latLonToProj, latLonToProj, latLonToProj, latLonToProj, latLonToProj, latLonToProj, latLonToProj, latLonToProj, latLonToProj, latLonToProjBB, projToLatLon, projToLatLon, projToLatLon, projToLatLon, projToLatLon, projToLatLon, projToLatLonBB, setDefaultMapArea, setName, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

RotatedLatLon

public RotatedLatLon()

Default Constructor, needed for beans.

RotatedLatLon

public RotatedLatLon(double southPoleLat,
                     double southPoleLon,
                     double southPoleAngle)

Constructor.

Parameters:

southPoleLat -

southPoleLon -

southPoleAngle -

Method Detail

constructCopy

public ProjectionImpl constructCopy()

copy constructor - avoid clone !!

Specified by:

constructCopy in class ProjectionImpl

Returns:

a copy of this Projection

paramsToString

public java.lang.String paramsToString()

returns constructor params as a String

Specified by:

paramsToString in interface Projection

Specified by:

paramsToString in class ProjectionImpl

Returns:

String

latLonToProj

public ProjectionPoint latLonToProj(LatLonPoint latlon,
                                    ProjectionPointImpl destPoint)

Transform a "real" longitude and latitude into the rotated longitude (X) and rotated latitude (Y).

Specified by:

latLonToProj in interface Projection

Specified by:

latLonToProj in class ProjectionImpl

Parameters:

latlon - convert from these lat, lon coordinates

destPoint - the object to write to

Returns:

the given destPoint

projToLatLon

public LatLonPoint projToLatLon(ProjectionPoint ppt,
                                LatLonPointImpl destPoint)

Transform a rotated longitude (X) and rotated latitude (Y) into a "real" longitude-latitude pair.

Specified by:

projToLatLon in interface Projection

Specified by:

projToLatLon in class ProjectionImpl

Parameters:

ppt - convert from these projection coordinates

destPoint - the object to write to

Returns:

LatLonPoint convert to these lat/lon coordinates

crossSeam

public boolean crossSeam(ProjectionPoint pt1,
                         ProjectionPoint pt2)

Unknown usage

Specified by:

crossSeam in interface Projection

Specified by:

crossSeam in class ProjectionImpl

Parameters:

pt1 -

pt2 -

Returns:

false alwaya

equals

public boolean equals(java.lang.Object proj)

Description copied from class: ProjectionImpl

Returns true if this represents the same Projection as proj.

Specified by:

equals in interface Projection

Specified by:

equals in class ProjectionImpl

Parameters:

proj - projection in question

Returns:

true if this represents the same Projection as proj.

main

public static void main(java.lang.String[] args)