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PolyMap
-
Map coordinates using polynomial functions
- Description:
- A PolyMap is a form of Mapping which performs a general polynomial
transformation. Each output coordinate is a polynomial function of
all the input coordinates. The coefficients are specified separately
for each output coordinate. The forward and inverse transformations
are defined independantly by separate sets of coefficients.
- Constructor Function:
- AST_POLYMAP
-
Inheritance
- The PolyMap class inherits from the Mapping class.
-
Attributes
- The PolyMap class does not define any new attributes beyond
those which are applicable to all Mappings.
-
Functions
- In addition to those routines applicable to all Objects, the
following routines may also be applied to all Mappings:
- AST_POLYTRAN: Fit a PolyMap inverse or forward transformation
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AST A Library for Handling World Coordinate Systems in Astronomy
Starlink User Note 210
R.F. Warren-Smith & D.S. Berry
24th May 2011
E-mail:ussc@star.rl.ac.uk
Copyright (C) 2009 Science \& Technology Facilities Council