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Re: [ferret_users] Changing grid units



Both setting the format of tic labels and re-defining data X and Y axes
in km worked well for me.

Thanks, Ansley!

--- Peng

----- Original Message -----
From: Ansley Manke <Ansley.B.Manke@xxxxxxxx>
Date: Tuesday, September 27, 2011 12:29 pm
Subject: Re: [ferret_users] Changing grid units

> 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
> 


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