Re: [ferret_users] Changing grid units

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

Hi -
You could leave the grid as is, and set the format of tic labels to show 
enough digits, for instance

shade/set var
ppl xfor (f9.0)
ppl yfor (f9.0)
ppl shade

or using scientific notation

shade/set var
ppl xfor (e10.2)
ppl yfor (e10.2)
ppl shade

You might need to make bigger margins to make room for these labels (see 
the script "go margins")

The other option would be to redefine your axes in terms of Km and 
regrid the variables to the new axes.  See "DEFINE AXIS/FROM_DATA"  
where for instance the X coordinates converted to Km would be,

x[gx=xgrid]/1000

-Ansley

On 9/26/2011 11:58 AM, Ge.Peng@xxxxxxxx wrote:
> My data grid is polar_stereographic projection in meters:
>
> yes? sho grid
>   Default grid for DEFINE VARIABLE is ABSTRACT
>   Last successful data access was on grid GKV2
>      GRID GKV2
>   name       axis              # pts   start                end
>   XGRID     X (meters)         304 r   -3837500             3737500
>   YGRID     Y (meters)         448 r   -5337500             5837500
>   normal    Z
>   TIME1     TIME                 1 r   30-SEP-2007 00:00    30-SEP-2007 00:00
>
>
> Too long for the x and y tick labels for the negative numbers.
>
> How do I convert the X and Y axis from meter to km?
>
> Thanks,
>
> --- Peng