Scripts which make use of any of the removed or modified parameters will fail when run with KAPPA V0.13. Such scripts will need to be changed to take account of the new features introduced in this release. Check the lists below for details.
Several new applications have also been written to support the use of the WCS component. If no WCS component is present within an NDF, applications which read the WCS component will attempt to find suitable WCS information in one of two other sources. First, any IRAS90 astrometry structure contained within an NDF extension will be used. If no such structure can be found, any FITS header cards in the FITS extension will be used. Applications which write WCS information to an NDF will always write it in the form of a WCS component.
One of the major changes is that some graphics applications which
previously had many parameters to control the appearance of the plot
(ABSLAB, ORDLAB, FONT, PLTITL, etc.), now use a single STYLE
parameter instead. The value supplied for a STYLE parameter should be a
group of plotting attributes. Defaults for unspecified plotting
attributes are read from text files within $KAPPA_DIR (e.g.
$KAPPA_DIR/kappa_style.def. Alternative defaults files may be specified
by setting environment variables (e.g. KAPPA_STYLE) to hold
the name of the defaults file to use.
Another major change is that the new and modified applications no longer use the global COSYS parameter to select data (i.e. axis) or world (i.e. pixel) co-ordinates. Instead, each NDF carries knowledge around with it of several co-ordinate `Frames', one of which is nominated as the current co-ordinate Frame. This information is stored in the WCS component of each NDF. All interaction with a given NDF uses the current co-ordinate Frame when referring to positions within the NDF. The new application WCSFRAME can be used to change the current co-ordinate Frame in an NDF.
A more minor change is that the PXSIZE and PYSIZE parameters have been removed from the modified graphics applications. These parameters were previously used to specify the absolute size of the picture in metres. PICDEF can now be used to do this, using the new SIZE parameter. A picture of the required size should be created before running the appropriate plotting application.
The section ``Graphics Database'' has been
completely re-written to illustrate the new WCS facilities of the AGI
graphics database. In addition, two new sections have been added:
Co-ordinate Systems'' describes the use of WCS information
within NDFs, and ``Plotting
Styles and Attributes'' relates the use of graphical style parameters.
KAPPA --- Kernel Application Package