Other 2-D representations of 3-D data

CHANNEL-MAPS	Sequence of contour plots in evenly spaced intervals
GRID-SPECTRA	Set of postage-stamp sized spectra on RA/Dec grid
PLOT-LINE-PARAMETERS	Plot (sub)set of $T_{max}$, $V_{max}$, $\Delta v_{eq}$ or $\int T\,dv$.
ROTATE-MAP	Regrid cube to new set of spatial axes

In addition to the normal contour maps of a single plane of the cube, there are also three other display modes. Spectra at each point can be displayed using GRID-SPECTRA (Fig 3.6) where the area treated in this way is decided using SET-MAP-SCALES and SET-MAP-PARAMETERS as before.

PLOT-LINE-PARAMETERS (Figure 3.7) produces autoscaled contour plots of the integrated intensity, peak intensity, equivalent line width and velocity of peak emission over the area and velocity/frequency range of interest. It can also plot the first and second moments of the line profile, which for high S/N data are the velocity centroid and dispersion (variance).

CHANNEL-MAPS (Figure 3.8) produces a sequence of maps of the

integrated or average emission in successive ``slices" (not necessarily of zero thickness) of the cube. Thus it will produce sequences of spatial maps, of longitude-velocity diagrams or whatever. Like CONTOUR-MAP, the maps from CHANNEL-MAPS can be rotated with respect to the nominal map axes to give cuts along arbitrary spatial directions. The contours used are those set by SET-CONTOUR-LEVELS on the last occasion it was used in manual (i.e.non-automatic) mode.

Where possible, a scale-bar is presented either above or to the right of a greyscaled plot -- where ever there is most room. A scale bar is not presented however when there are multiple greyscales in force on the one picture, as in the output from PLOT-LINE-PAR when more than one parameter is plotted. As with single maps, spatial coordinates may be labelled either relative to the map centre (in arcseconds of offset), or, if appropriate, as absolute positions.