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IsLonAxis(axis) - Is the specified celestial axis a longitude axis?

Description:
This is a read-only boolean attribute that indicates the nature of the specified axis. The attribute has a non-zero value if the specified axis is a celestial longitude axis (Right Ascension, Galactic longitude, etc), and is zero otherwise.
Type:
Integer (boolean), read-only.
Class Applicability:
SkyFrame
All SkyFrames have this attribute.
Notes:
  • When specifying this attribute by name, it should be subscripted with the number of the SkyFrame axis to be tested.


next up previous 264
Next: IsSimple - Has the Mapping been simplified?
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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
25th February 2013
E-mail:starlink@jiscmail.ac.uk

Copyright (C) 2014 Science \& Technology Facilities Council