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- Description:
A UnitMap is a unit (null) Mapping that has no effect on the
coordinates supplied to it. They are simply copied. This can be
useful if a Mapping is required (e.g. to pass to another
routine) but you do not want it to have any effect.
The Nin and Nout attributes of a UnitMap are always equal and
are specified when it is created.
- Constructor Function:
- AST_UNITMAP
-
Inheritance
The UnitMap class inherits from the Mapping class.
-
Attributes
The UnitMap class does not define any new attributes beyond
those which are applicable to all Mappings.
-
Functions
The UnitMap class does not define any new routines beyond those
which are applicable to all Mappings.
Next: WcsMap - Implement a FITS-WCS sky projection
Up: AST Class Descriptions
Previous: SpecMap - Sequence of spectral coordinate conversions
AST A Library for Handling World Coordinate Systems in Astronomy
Starlink User Note 210
R.F. Warren-Smith & D.S. Berry
30th April 2003
E-mail:ussc@star.rl.ac.uk
Copyright (C) 2003 Central Laboratory of the Research Councils