This routine returns a FrameSet describing the WCS information in an NDF. If the NDF has no WCS component, any IRAS90 IRA structure is converted into a FrameSet and returned. If the NDF has no IRAS90 IRA structure, then an attempt is made to read a FrameSet from the FITS headers in the FITS extension. If the NDF has no FITS extension, then the default NDF FrameSet is returned.

CALL KPG1_GTWCS( INDF, IWCS, STATUS )

INDF = INTEGER (Given)

IWCS = INTEGER (Returned)

STATUS = INTEGER (Given and Returned)

• If a WCS FrameSet is created form an IRAS90 astrometry structure or a FITS extension, it will be stored in the supplied NDF if write access is available for the NDF.

• The preferred AST encodings to use when interpreting FITS headers can be specified as a comma-delimited string using environment variable KAPPA_ENCODINGS. If this variable is not defined, then the normal default encodings are used (see FITSDIN).