Re: [ferret_users] lines at grid boundries

[Ansley Manke <ansley.b.manke@xxxxxxxx>]

Hi Ashley,
There are a few ways to do this kind of thing. 

1) To make graticule lines across the plot, located at the tic marks of 
any plot, use the /graticule qualifier on your plot command.

  yes? SHADE/GRATICULE var

The Users Guide has more on this qualifier, which can be made so that 
you control the horizontal and vertical graticules separately, and 
choose the color and style of the lines drawn.  Look under the plot 
commands SHADE, PLOT, etc.

2) To plot the grid coordinate locations there is a family of scripts 
gratxy.jnl, gratxz.jnl, etc  which draw lines at the (X,Y)  or (X,Z), 
etc coordinate locations. See how these scripts work by typing

  yes? go/help  gratxy.jnl

Notice how the script sets specific levels and uses a CONTOUR command to 
draw the lines; you might want to make your own version of the script 
and change how the levels are specified if your coordinates are located 
somewhere else than integer values.

3) Also, check the script gridlines.jnl  which allows you to specify a 
delta value in units of the coordinates, and will draw dashed lines at 
the specified locations.

  yes? go/help gridlines.jnl

Ansley



Ashley Watson wrote:
> Hi ferreters,
>
>     I am trying to draw lines that separate grid boxes. For example, I 
> have plotted the variable "rose" for selected region.
>
> yes? use etopo20
> yes? set reg/X=108E:112E/Y=3N:5N
> yes? shade Rose
>
> How can I draw graticule exactly at grid boundries on this plot.
>
> Regards
>
> Ashley

--

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Ansley Manke, NOAA/PMEL   ansley.b.manke@xxxxxxxx
7600 Sand Point Way NE, Seattle WA
Phone 206-526-6246,  FAX 206-526-6744