Appendix D  FIGURES

The figures in this appendix are intended to help illustrate some of
the ideas explained in the text.  Captions for the figures are located
on the pages facing the images for quick reference.  Below is a list
of the contents of Appendix D.


          PAGE      FIGURE

           D-3      Examples of graphs and 3-D objects

           D-5      Examples of 2-D objects

           D-7      Example of a cross section, or sky cut, and
                    its "complementary" cross section

           D-9      Example of zooming

           D-11     Example of dipole subtraction


Figure D.1  Graphs and 3-D Objects
----------------------------------

The figure at the right shows examples of graphs and 3-D objects.
Graphs include line plots (top), histograms, etc.  3-D objects are
called spectral cubes, or stacks of skycubes.  UIMAGE represents these
three dimensional objects as shown in the bottom figure on the
opposite page.  (See section 4.2.7 for more information about object
classification.)


Figure D.2  2-D Objects
-----------------------

This figure shows some examples of 2-D objects, which include skycubes
(top left), any face(s) of a skycube, 3-D surface plots of skycubes
(top right), and reprojections (lower figure).  Although mildly
confusing, 3-D surface plots are considered 2-D objects because the
3-D plot is simply another representation of a skycube and not
actually a 3-D object.  (See section 4.2.7 for more information about
object classification.)


Figure D.3  Cross Sections/Sky Cuts
-----------------------------------

This figure explains the View "complementary" cross section option in
the Cross sections, sky cuts menu.  After two points have been
specified, UIMAGE automatically draws the shorter arc of the great
circle (upper right).  However, if you choose the View "complementary"
cross section option, UIMAGE will draw the other part of the arc
(upper left).  The graphs show data value vs. position along the arc.


Figure D.4  Zooming
-------------------

This figure shows an example of UIMAGE's zoom function.  When you
begin this option, the zoom window (bottom window in the figure) is
initially empty.  Once the empty window is resized and a zoom factor
chosen, click <MB1> on the zoom center and the zoom is displayed in
the previously empty window.  The box on the original data object (top
window in figure) shows the region that will be displayed in the zoom
window.

This example used a 6 x 6 zoom window and a zoom factor of 7.


Figure D.5  Reprojections and Dipole Subtraction
------------------------------------------------

The top figure on the opposite page shows an example of a Mollweide
reprojection.  The figure underneath shows the same data after a
dipole subtraction.