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         if( coord_in ) *coord_in = ins[ 0 ];

/* If so, invert the map so that it goes from pixel to wcs. Here on we
   use "map" in place of the supplied Mapping "smap", so modify the other
   supplied arguments so that they refer to the single output of "map". */
         astInvert( map );
         lbnd_in += ins[ 0 ];
         ubnd_in += ins[ 0 ];
         coord_out = 0;

/* If the output was fed by more than one input, annul the split mapping
   and use the supplied nmapping. */
      } else {
         (void) astAnnul( map );
         map = astClone( smap );
      }
      ins = astFree( ins );

/* If the supplied Mapping could not be split, use the supplied nmapping. */
   } else {
      map = astClone( smap );