


                                  - 1 -



       COMMAND

       llllggggmmmmiiiirrrrrrrroooorrrr,,,, llllttttmmmmiiiirrrrrrrroooorrrr ---- mmmmiiiirrrrrrrroooorrrr iiiimmmmaaaaggggeeee aaaaccccrrrroooossssssss rrrreeeeffffeeeerrrreeeennnncccceeee lllliiiinnnneeee

       USAGE

       llllggggmmmmiiiirrrrrrrroooorrrr ----llll|hhhh _r_e_f_e_r_e_n_c_e

       llllttttmmmmiiiirrrrrrrroooorrrr ----llll|hhhh _r_e_f_e_r_e_n_c_e

       DESCRIPTION

       ----llll          Reflect low side to high side.

       ----hhhh          Reflect high side to low side.

       _r_e_f_e_r_e_n_c_e   Longitude or latitude of reflection plane.

       Please see the mmmmiiiirrrrrrrroooorrrr command for a simplified version of
       mirroring.

       LLLLggggmmmmiiiirrrrrrrroooorrrr and llllttttmmmmiiiirrrrrrrroooorrrr are very nearly analogues of each
       other.  Their command structure is much the same and these
       commands differ only in the orientation of the the data
       reflection operation, i.e., longitudinal versus latitudinal.

       LLLLggggmmmmiiiirrrrrrrroooorrrr results in the copying of each longitude from the
       source side of longitude _r_e_f_e_r_e_n_c_e to its mirror image
       position on the destination side of the longitude _r_e_f_e_r_e_n_c_e.
       Similarly, llllggggmmmmiiiirrrrrrrroooorrrr copies each latitude from the source
       side of latitude _r_e_f_e_r_e_n_c_e to its mirror image position on
       the destination side of the latitude _r_e_f_e_r_e_n_c_e.

       In both instances the source side of the image relative to
       _r_e_f_e_r_e_n_c_e is indicated by your choice of the ----llll or the ----hhhh
       switch argument.  The former refers to the low numbered
       longitude or latitude side while the latter refers to the
       longitude or latitude side bearing numbers higher than
       _r_e_f_e_r_e_n_c_e.

       Both commands result in the resetting of either the
       longitude range (llllggggmmmmiiiirrrrrrrroooorrrr) or the latitude range (llllttttmmmmiiiirrrrrrrroooorrrr)
       to their full range values so that full (wrap around)
       reflections can be achieved without regard to the proximity
       of the reference longitude to currently set range limits.

















                                  - 2 -



       CAVEATS

       The degree of prudence required in selecting an appropriate
       reference, longitude or latitude, is largely contingent upon
       your taste for surprises.  Generally speaking, the reference
       should effectively split one or more prominent features and
       be essentially parallel with that feature's natural plane of
       symmetry.  This is much more easily achieved in the
       longitudinal case than in the latitudinal case for many
       frequently digitized subjects, e.g., the human head.

       The cleanest appearing results are usually achieved when you
       shift the the image (llllggggsssshhhhiiiifffftttt or llllttttsssshhhhiiiifffftttt) so that the feature
       about which you wish the reflection to occur lies at either
       longitude 256 or latitude 128 as the case may be.












































