	LOGICAL FUNCTION TM_SAME_GRID_DEF( grid1, grid2 )

*
*
*  This software was developed by the Thermal Modeling and Analysis
*  Project(TMAP) of the National Oceanographic and Atmospheric
*  Administration's (NOAA) Pacific Marine Environmental Lab(PMEL),
*  hereafter referred to as NOAA/PMEL/TMAP.
*
*  Access and use of this software shall impose the following
*  obligations and understandings on the user. The user is granted the
*  right, without any fee or cost, to use, copy, modify, alter, enhance
*  and distribute this software, and any derivative works thereof, and
*  its supporting documentation for any purpose whatsoever, provided
*  that this entire notice appears in all copies of the software,
*  derivative works and supporting documentation.  Further, the user
*  agrees to credit NOAA/PMEL/TMAP in any publications that result from
*  the use of this software or in any product that includes this
*  software. The names TMAP, NOAA and/or PMEL, however, may not be used
*  in any advertising or publicity to endorse or promote any products
*  or commercial entity unless specific written permission is obtained
*  from NOAA/PMEL/TMAP. The user also understands that NOAA/PMEL/TMAP
*  is not obligated to provide the user with any support, consulting,
*  training or assistance of any kind with regard to the use, operation
*  and performance of this software nor to provide the user with any
*  updates, revisions, new versions or "bug fixes".
*
*  THIS SOFTWARE IS PROVIDED BY NOAA/PMEL/TMAP "AS IS" AND ANY EXPRESS
*  OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
*  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
*  ARE DISCLAIMED. IN NO EVENT SHALL NOAA/PMEL/TMAP BE LIABLE FOR ANY SPECIAL,
*  INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
*  RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
*  CONTRACT, NEGLIGENCE OR OTHER TORTUOUS ACTION, ARISING OUT OF OR IN
*  CONNECTION WITH THE ACCESS, USE OR PERFORMANCE OF THIS SOFTWARE. 
*
*
* Check to see if the guts of the two grids are identical

* revision 0.00 - Steve Hankin - based on TM_FIND_LIKE_GRID by  M. Verschell
* 12/3/92 *sh* - on mpsnorm axes ignore inner/outer
* IBM port 14apr94 *kob* : Logical expressions need to be compared
*			   using NEQV and EQV
* V674 2/12 *acm* 6D Ferret: use nferdims rather than 4 for dimension indexing

* Include files

	include 'tmap_dims.parm'
#include "tmap_dset.parm"
#include "gt_lib.parm"
	include 'xtm_grid.cmn_text'
	
* Argument definitions
	INTEGER*4	grid1, grid2

* Local definitions
	INTEGER*4	i

	DO 100 i=1,nferdims
	  IF (grid_line(i,grid1) .NE. grid_line(i,grid2) ) GOTO 1000
          IF ( grid_line(i,grid1) .NE. mpsnorm ) THEN           ! 12/3
             IF (grid_out_prod(i,grid1) .NEQV. grid_out_prod(i,grid2))
     .	                                                   GOTO 1000
          ENDIF
  100	CONTINUE

* All nferdims axis matched - check grid rotation
	IF (grid_rotation(grid1) .NE. grid_rotation(grid2)) GOTO 1000

* they match
  	TM_SAME_GRID_DEF = .TRUE.
        RETURN

* they don't match
 1000   TM_SAME_GRID_DEF = .FALSE.
        RETURN

	END
