#  This macro snaps edge nodes to a geodetic map frame.

  # first, change the display to raster only.
graphics
view map

  # next, create a set of single branch nodes (to be snapped).
crit_clear
crit_type  4
crit_exec  21  nodes with exactly one branch

  # now, snap the last set to the geodetic map frame.
level_snap  21  32  32  2.500000  0  1

  # finally, display the map vectors & show the user what they have by
  # displaying the raster, the vectors, and highlighting the corners.
graphics +n0 +h34
