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ProjP(m) - FITS-WCS projection parameters

Description:
This attribute provides aliases for the PV attributes, which specifies the projection parameter values to be used by a WcsMap when implementing a FITS-WCS sky projection. ProjP is retained for compatibility with previous versions of FITS-WCS and AST. New applications should use the PV attibute instead.

Attributes ProjP(0) to ProjP(9) correspond to attributes PV$<$axlat$>$_0 to PV$<$axlat$>$_9, where $<$axlat$>$ is replaced by the index of the latitude axis (given by attribute WcsAxis(2)). See PV for further details.

Type:
Floating point.
Class Applicability:
WcsMap
All WcsMaps have this attribute.


next up previous 264
Next: Projection - Sky projection description
Up: AST Attribute Descriptions
Previous: PreserveAxes - Preserve axes?

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