
<change id=0025>
 <author> Neil Killeen </author>
 <date> 2000/07/24 </date>
 <avers> 1.4 </avers>
 <area> Tool </area>
 <package> coordinates </package>
 <module> coordsys </module>
 <type> Code Documentation </type>
 <category> New </category>
 <defects>  </defects>
 <summary>
A new tool called 'coordsys' has been added which allows manipulation of a coordinate system
 </summary>
 <description>
The coordsys tool can create coordinate systems in isolation.
Such a tool can also be made by the image.coordsys
tool function, and reset with image.setcoordsys

the coordsys tool can then be used to manipulate most
of the contents of the coordinate system
 </description>
</change>

<change id=0058>
 <author> Neil Killeen </author>
 <date> 2000/12/04 </date>
 <avers> 1.5 </avers>
 <area> Tool </area>
 <package> coordinates </package>
 <module> coordsys </module>
 <type> Code Documentation Test </type>
 <category> New </category>
 <defects>  </defects>
 <summary>
relative coordinates are now supported
 </summary>
 <description>
Support was added to the Coordsys tool
to handle relative coordinates (pixel or world)

ALso flexibility for different world coordinate format
types was imporved and offered wherever a world coordinate
is used.
 </description>
</change>

<change id=0059>
 <author> Neil Killeen </author>
 <date> 2000/12/04 </date>
 <avers> 1.5 </avers>
 <area> Library </area>
 <package> coordinates </package>
 <module> Coordinates </module>
 <type> Code Documentation Test </type>
 <category> New </category>
 <defects>  </defects>
 <summary>
Support added for relative coordinates
 </summary>
 <description>
The coordinates classes have been imporved to offer
support for relative coordinates (world or pixel)
 </description>
</change>

<change id=0060>
 <author> Neil Killeen </author>
 <date> 2000/12/04 </date>
 <avers> 1.5 </avers>
 <area> Library </area>
 <package> coordinates </package>
 <module> Coordinates </module>
 <type> Code </type>
 <category> Change </category>
 <defects>  </defects>
 <summary>
StokesCoordinate  internals changed
 </summary>
 <description>
The StokesCoordinate class has had its internals changed
so that referencepixel, reference value, increment, 
and linear transform matrix are all no longer used.
The functions to change these attributes now take no action.
 </description>
</change>

<change id=0067>
 <author> Neil Killeen </author>
 <date> 2001/01/10 </date>
 <avers> 1.5 </avers>
 <area> Library </area>
 <package> coordinates </package>
 <module> Coordinates </module>
 <type> Code </type>
 <category> New </category>
 <defects>  </defects>
 <summary>
Added pointng center to ObsInfo
 </summary>
 <description>
The ObsInfo class has been enhanced so that it now also
holds the pointing center (as distinct from the tangent point).
OBSRA and OBSEC are read/written from/to  FITS files
 </description>
</change>
