The most comprehensive plotting function available is astGrid, which
can be used to draw labelled coordinate axes and, optionally, to
overlay coordinate grids on the plotting area
(Figure ). The routine is straightforward to use,
simply requiring a pointer to the Plot:
astGrid( plot );
It will draw both linear and curvilinear axes and grids, as required by the particular Plot. The appearance of the output can be modified in a wide variety of ways by setting various Plot attributes.
AST A Library for Handling World Coordinate Systems in Astronomy