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The Mapping Model

The concept of a Mapping was illustrated in Figure [*]. It is a black box which you can supply with a set of coordinate values in return for a set of transformed coordinates. The two sets are termed input and output coordinates. You can also go back the other way and transform output coordinates back into input coordinates, as we saw in [*].


next up previous 264
Next: Input and Output Coordinate Numbers
Up: Inter-Relating Coordinate Systems (Mappings)
Previous: The Mapping Class

AST A Library for Handling World Coordinate Systems in Astronomy
Starlink User Note 211
R.F. Warren-Smith & D.S. Berry
24th May 2011
E-mail:ussc@star.rl.ac.uk

Copyright (C) 2009 Science \& Technology Facilities Council