Package skyview.geometry
Class CoordinateSystem
java.lang.Object
skyview.geometry.CoordinateSystem
- All Implemented Interfaces:
Serializable
,Component
The class defines coordinate systems in terms of the
operations needed to transform the standard coordinate
system (currently J2000) to the coordinate system
associated with the object. Most coordinate systems will
be defined as simple rotations, but some coordinate systems
may involve more complext transformations.
A factory method is available to generate Coordinate systems from
a given string. Typically a string is comprised
of an initial and an epoch (e.g., "B1950", "J1975.5"). Any string
beginning with "G" is assumed to be Galactic coordinates.
- See Also:
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Field Summary
FieldsModifier and TypeFieldDescriptionstatic final CoordinateSystem
Standard B1950 coordinatesstatic final CoordinateSystem
Standard Galactic coordinatesstatic final CoordinateSystem
Standard ICRS coordinatesstatic final CoordinateSystem
Standard J2000 coordinates -- the reference frame -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionstatic CoordinateSystem
Get a coordinate system by name.static CoordinateSystem
abstract Rotater
Get the rotation associated with the projection.Get the distortion associated with the projection.Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
Methods inherited from interface skyview.Component
getDescription, getName
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Field Details
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J2000
Standard J2000 coordinates -- the reference frame -
B1950
Standard B1950 coordinates -
Gal
Standard Galactic coordinates -
ICRS
Standard ICRS coordinates
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Constructor Details
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CoordinateSystem
public CoordinateSystem()
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Method Details
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getRotater
Get the rotation associated with the projection. -
getSphereDistorter
Get the distortion associated with the projection. By default there is no distortion, but subclasses, notably BesselianProjection, can override this. -
factory
Get a coordinate system by name.- Parameters:
name
- A designation of the desired coordinate system. Normally the name is an initial designating the general frame and orientation of the coordinate system followed by an epoch of equinox, e.g., J2000, B1950 E2000.45. The initial letters are:- J
- Julian Equatorial Coordinates.
- B
- Besselian Equatorial Coordinates.
- E
- Julian Ecliptic Coordinates
- H
- Helioecliptic coordinates.
- G
- Galactic coordinates. Only the first letter is parsed.
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factory
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