Help for GENGRID

PURPOSE

     GENGRID creates an ibis file containing a grid in the first two
columns.  The user can select the number of columns if more than four
are desired (all will be double precision).  If other types of columns
are desired (say character), they can be joined in the usual way.

     To turn the grid into a geom grid, two more columns must be
provided by the user, usually by mapping the first two columns with
PIXMAP using a reference (mapped) image, or by applying PICMTCH4 to
a pair of images.
	   
CALL
     gengrid output parms
  WHERE:
     output       is the output ibis table containing a grid in two columns
     parms        specify the size and spacing of the grid


  
OPERATION

The ibis file is generated with IBIS-GEN and the grid points are calculated
by the routine MF3.

PERFORMANCE

A 1000 x 1000 grid should only take a few seconds.

Restrictions
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PROGRAM HISTORY:

Original Programmer: A. L. Zobrist, 01 Nov. 2001
Current Cognizant Programmer: B. A. McGuffie

2022-06-27 B. Crocco afids to opensource