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[GREG1\]SET SEXAGESIMAL [X [Nx]] [Y [[Ny]]
Set X axis labelling in sexagesimal notation with Nx decimals (resp. Y).
The default (Nx=1, Ny=0 and no sexagesimal notation) is nearly always
perfect for everybody.
So, this command is used for two restricted purposes:
- to enable sexagesimal notation of axis when a projection is in use,
the system is GALACTIC and the /ABSOLUTE option is required (for
EQUATORIAL systems, the sexagesimal notation is always used in this
case, but the default for GALACTIC system is a decimal representa-
tion of degrees).
- to specify the number of decimals when using ABSOLUTE labelling
(see BOX /ABSOLUTE or AXIS /ABSOLUTE).
Note that, when a realistic tick spacing is required by the user or (the
default) GreG computes this spacing automatically, labelled tickmarks
will fall on rounded values, so no decimals will appear (unless the
field of view is smaller than a few arc seconds).