\CANCEL MODE VERIFY
! Description: create an overlay of XZ graticule lines to show the axis values 

! Note: you may need to change the PPL LEV commands to contour over the
!       range of the axes for your data.  
! Example:
!     yes? use levitus_climatology
!     yes? shade/y=0/x=140:190/z=0:500 temp
!     yes? go gridxz

SET GRID/SAVE
SET GRID				! grid from last data access
CONTOUR/OVER/SET/NOLABELS X+(Z*0)	! "Z*0" to create 2D structure
PPL PEN 1,1
PPL LEV () (1,400,1,-3) (10,400,10,-1) DARK(10,400,10)
PPL CONTOUR/OVER
CONTOUR/OVER/SET/NOLABELS Z+(X*0)
PPL PEN 1,1
PPL LEV () (-1000,1000,10,-3) (-1000,1000,100,-1) DARK(-1000,1000,100)
PPL CONTOUR/OVER
SET GRID/RESTORE

SET MODE/LAST VERIFY
