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Compound Mappings (CmpMaps)

We now turn to a rather special form of Mapping, the CmpMap. The Mappings we have considered so far have been atomic, in the sense that they perform pre-defined elementary transformations. A CmpMap, however, is a compound Mapping. In essence, it is a framework for containing other Mappings and its purpose is to allow those Mappings to work together in various combinations while appearing as a single Object. A CmpMap's behaviour is therefore not pre-defined, but is determined by the other Mappings it contains.


Subsections

next up previous 264
Next: Combining Mappings in Series
Up: AST A Library for Handling World Coordinate Systems in Astronomy
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AST A Library for Handling World Coordinate Systems in Astronomy
Starlink User Note 211
R.F. Warren-Smith & D.S. Berry
7th December 2012
E-mail:starlink@jiscmail.ac.uk

Copyright (C) 2012 Science \& Technology Facilities Council