ISOCAM Interactive Analysis User's Manual Version 5.0 - ISO - ESA

14.7. CREATING HARDCOPY PLOTS 153
14.7 Creating hardcopy plots
14.7.1 Using xcontour
This is a widget-based program for producing contour plots for screen display and postscript
output. You call it with a single image, specifying the window for display (keyword win) ifyou
wish:
CIA> xcontour, raster_pds.raster, win=1
xcontour presents you with a widget for choosing contour levels and contour label sizes.
• Click on apply when you want to see your contours plotted.
• Click on annotate to display a widget which allows you to annotate text and graphics to
your plot. This is usual for marking regions of interest in an image. options gives you the
postscript output options available. Options for producing an output file are available in
the drop-down menu under the push button file.
• Click on print to screen dump the graphics window to a postscript file.
14.7.2 Screen dumps with ps color
ps color produces a postscript or GIF format file from the contents of an IDL graphics window.
This routine has keywords for: specifying a filename for the output file, choosing the window to
dump to the file, setting the orientation of the postscript output to landscape, passing a title
for the plot and placing the ESA/CEA copyright notice in the plot window margin. Note that
ps color needs sufficient room in the margins for placing text. If the margins are not wide
enough for this you may have to adjust your plot (see the IDL User’s Manual). Each of these
keywords appear in the following example in the order in which they have just been described.
CIA> ps_color, filename=’test.ps’, win=0, /landscape, title=’hhh’, $
CIA> /copyright
Alternatively, ps color can produce GIF output:
CIA> ps_color, filename=’test.gif’, win=0, /gif
You may find the routines white and black useful with ps color. These routines change
the colour table to black on white and back to white on black, respectively, making your output
plot more readable (and saving printer toner).
14.8 Redirecting graphics to the postscript device
ps open and ps print are used to redirect graphics to the postscript device. The former opens
an output postscript file and the latter closes the file.
Several keywords can be supplied to ps open. In the example below the output file to be
created contains a plot in portrait orientation, in colour and in encapsulated format. Without
setting the keywords it defaults to landscape, grey-scale and normal postscript, respectively.
The name of the output file is idl.ps.