ucar.unidata.geoloc.projection.sat
Class MSGnavigation

java.lang.Object
  ucar.unidata.geoloc.ProjectionImpl
      ucar.unidata.geoloc.projection.sat.MSGnavigation

All Implemented Interfaces:

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

public class MSGnavigation
extends ProjectionImpl

Port Eumetsat MSG_navigation.c to java from http://www.eumetsat.int/idcplg?IdcService=GET_FILE&dDocName=zip_tools_msg_nav_c&RevisionSelectionMethod=LatestReleased

Since:

Jan 9, 2010

Author:

caron

See Also:

"http://www.eumetsat.int/idcplg?IdcService=GET_FILE&dDocName=PDF_CGMS_03&RevisionSelectionMethod=LatestReleased", "www.itc.nl/library/papers_2005/conf/gieske_pro.pdf", 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

MSGnavigation()

MSGnavigation(double lat0, double lon0, double major_axis, double minor_axis, double sat_height, double scale_x, double scale_y)
Constructor

Method Summary

ProjectionImpl	constructCopy() copy constructor - avoid clone !!
boolean	crossSeam(ProjectionPoint pt1, ProjectionPoint pt2) Does the line between these two points cross the projection "seam".
boolean	equals(java.lang.Object proj) Returns true if this represents the same Projection as proj.
ProjectionPoint	latLonToProj(LatLonPoint latlon, ProjectionPointImpl destPoint) Convert a LatLonPoint to projection coordinates
ProjectionRect	latLonToProjBB(LatLonRect rect) Create a ProjectionRect from the given LatLonRect.
static void	main(java.lang.String[] arg)
java.lang.String	paramsToString() Get a string representation of the projection parameters
LatLonPoint	projToLatLon(ProjectionPoint ppt, LatLonPointImpl destPoint) Convert projection coordinates to a LatLonPoint Note: a new object is not created on each call for the return value.
java.lang.String	toString() Get a String representation of this projection.

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, projToLatLon, projToLatLon, projToLatLon, projToLatLon, projToLatLon, projToLatLon, projToLatLonBB, setDefaultMapArea, setName

Methods inherited from class java.lang.Object

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

Constructor Detail

MSGnavigation

public MSGnavigation()

MSGnavigation

public MSGnavigation(double lat0,
                     double lon0,
                     double major_axis,
                     double minor_axis,
                     double sat_height,
                     double scale_x,
                     double scale_y)

Constructor

Parameters:

lat0 - in degrees; geosynch satelite is over this point

lon0 - in degrees; geosynch satelite is over this point

major_axis - in meters

minor_axis - in meters

sat_height - in meters

scale_x - convert between aperature size in radians and distance in km (xrad = xkm / scale_x)

scale_y - scale_factor = (nr - 1) * major_axis, nr = altitude of the camera from the Earths centre, measured in units of the Earth (equatorial) radius

Method Detail

toString

public java.lang.String toString()

Description copied from class: ProjectionImpl

Get a String representation of this projection.

Overrides:

toString in class ProjectionImpl

Returns:

the name of the projection. This is what gets displayed when you add the projection object to a UI widget (e.g. label, combobox)

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()

Description copied from class: ProjectionImpl

Get a string representation of the projection parameters

Specified by:

paramsToString in interface Projection

Specified by:

paramsToString in class ProjectionImpl

Returns:

string representation of the projection parameters

latLonToProj

public ProjectionPoint latLonToProj(LatLonPoint latlon,
                                    ProjectionPointImpl destPoint)

Description copied from class: ProjectionImpl

Convert a LatLonPoint to projection coordinates

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)

Description copied from class: ProjectionImpl

Convert projection coordinates to a LatLonPoint Note: a new object is not created on each call for the return value.

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)

Description copied from class: ProjectionImpl

Does the line between these two points cross the projection "seam".

Specified by:

crossSeam in interface Projection

Specified by:

crossSeam in class ProjectionImpl

Parameters:

pt1 - the line goes between these two points

pt2 - the line goes between these two points

Returns:

false if there is no seam

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.

latLonToProjBB

public ProjectionRect latLonToProjBB(LatLonRect rect)

Create a ProjectionRect from the given LatLonRect. Handles lat/lon points that do not intersect the projection panel.

Overrides:

latLonToProjBB in class ProjectionImpl

Parameters:

rect - the LatLonRect

Returns:

ProjectionRect, or null if no part of the LatLonRect intersects the projection plane

main

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