NAME
        OrthoSlice2D

   DESCRIPTION
        This module extracts a 1-D lattice from any 2-D lattice at any grid point
        along one of its axes.  The same data and coordinate types used for the
        input lattice are used for the output lattice.  If the coordinate type is
        curvilinear then the number of output coordinate variables can be
        directly specified.  This is useful for some modules such as NAGGraph
        which demand 1 coordinate variable on a 1-D lattice, while other
        modules such as Particles2 can handle up to 3 coordinate variables on
        a 1-D lattice.  If the input lattice is not 2-D then no slicing will be done;
        it will just flow through to the output lattice.

   INPUTS

      Input -- Lattice
         This is the 2-D input lattice from which to slice a 1-D section.

   WIDGETS

      Axis -- Radio Box
         This determines which axis to slice along (I or J).  The selected axis will
         be left out of the resulting lattice.

      Slice Number -- Slider
         This is the grid point at which to slice along the selected axis.

      # Curvilinear Vars. -- Option Menu
         This determines how many coordinate variables should be sent out for
         a curvilinear lattice.

   OUTPUTS

      Output -- Lattice
         This is the sliced lattice reduced to the appropriate single axis if the
         input lattice is 2-D.  Otherwise, it's a duplicate of the input lattice.

   KNOWN PROBLEMS
      There are no known bugs.

   SEE ALSO
      MultiSlice, OrthoSlice, OrthoSlice2G, OrthoSlice3D, OrthoSlice4D,
      Particles2, Slice
      
      -
      
      Hans Vahlenkamp (Hans.Vahlenkamp@noaa.gov)
      Geophysical Fluid Dynamics Laboratory / NOAA
      Princeton University Forrestal Campus
      http://www.gfdl.noaa.gov