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NatLon - Native longitude of the reference point of a FITS-WCS projection

Description:
This attribute gives the longitude of the reference point of the FITS-WCS projection implemented by a WcsMap. The value is in radians in the "native spherical" coordinate system, and will usually be zero. See the description of attribute NatLat for further information.

The NatLon attribute is read-only.

Type:
Floating point, read-only.
Class Applicability:
WcsMap
All WcsMaps have this attribute.


next up previous 264
Next: Naxes - Number of Frame axes
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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
24th May 2011
E-mail:ussc@star.rl.ac.uk

Copyright (C) 2009 Science \& Technology Facilities Council