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Changes Introduced in V5.3

The following describes the most significant changes which occurred in the AST library between versions V5.2 and V5.3:

  1. The details of how a Frame is aligned with another Frame by the AST_FINDFRAME and AST_CONVERT functions have been changed. The changes mean that a Frame can now be aligned with an instance of a sub-class of Frame, so long as the number of axes and the Domain values are consistent. For instance, a basic 2-dimensional Frame with Domain ``SKY'' will now align succesfully with a SkyFrame, conversion between the two Frames being achieved using a UnitMap.

  2. Added method AST_MATCHAXES to the Frame class. This method allows corresponding axes within two Frames to be identified.

  3. The AST_ADDFRAME method can now be used to append one or more axes to all Frames in a FrameSet.


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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