[GRASS-dev] Re: grass-dev Digest, Vol 21, Issue 74

[Michael Barton]

On Jan 28, 2008, at 3:39 AM, grass-dev-request at lists.osgeo.org wrote:

> Date: Sun, 27 Jan 2008 23:44:42 -0800 (PST)
> From: Hamish <hamish_b at yahoo.com>
> Subject: Re: [GRASS-dev] what does zoom= do?
> To: grass-dev at lists.osgeo.org
> Message-ID: <236028.36339.qm at web45803.mail.sp1.yahoo.com>
> Content-Type: text/plain; charset=iso-8859-1
>
>> Glynn:
>>> It would be possible to implement the -a flag unconditionally,
>
> Hamish:
>> I prefer to use '-a' on an as-needed basis.
> ...
>> g.region n=9975 s=25 w=25 e=9975 res=50
>> # ** -a at this step would align to "00" and "50" not "25" and "75"
>
>
> I was reading 'unconditionally', as meaning "always", not as when  
> "when
> given with out other conditions". I've now spotted that double meaning
> but am unsure which meaning was intended. I assume the latter.
>
>
> Hamish
>
>

What I thought you meant and thought was a good idea would be the  
following...

g.region nsres=10 -a

...means that the region would be aligned to 10m in the NS direction  
and the current resolution (whatever that is) in the EW direction.

g.region -a

...would align to the current resolution in both NS and EW

g.region -a res=10

...would align to a 10m resolution in both direction.

Michael

____________________
C. Michael Barton, Professor of Anthropology
Director of Graduate Studies
School of Human Evolution & Social Change
Center for Social Dynamics & Complexity
Arizona State University

Phone: 480-965-6262
Fax: 480-965-7671
www: <www.public.asu.edu/~cmbarton>