[GRASSLIST:2738] Re: i.rectify and image resolution

[Markus Neteler]

On Wed, Dec 05, 2001 at 03:09:25PM -0300, ulf at mail.zmt.uni-bremen.de wrote:
> Thanks for your answer! Now there is another problem: The rectified
> image seems to be causing problems in the target data set; at least I
> get segmentation faults of d.rast and ps.map. Depending on the actual
> region, the image is printed more or less completely. Do you have any
> suggestions how to track this down? 
> 
> Thanks, Ulf

Ulf,

I temporarily had this problem: reason was that the file system 
was full. Can you do us a favor and retry, and watch the disk
free status?
You may use
watch df -k
for that purpose (if watch is installed on your machine).
Noter, the temp files are stored in the LOCATION, not in /tmp!

Unfortunately i.rectify doesn't send an error if disk full occurs.
But it silently cleans up after finishing - so the user doesn't 
realize the problem.

In my case a cleanup of unused stuff helped. However, please try
again before freeing space - this is the chance to track down
the bug/problem (either to confirm above idea or to point out that it is a
different problem).

Thanks in advance,

 Markus

 
>  > I recall having had problems with option 1 (define smallest area).
>  > I always check the region settings in the target location to ensure
>  > my image does not get truncated.  I will check this out again and
>  > get back to you.
>  > 
>  > Charles Beaudry
>  > 
>  > 
>  > 
>  > > -----Original Message-----
>  > > From: ulf at mail.zmt.uni-bremen.de [mailto:ulf at mail.zmt.uni-bremen.de]
>  > > Sent: Wednesday, December 05, 2001 10:33 AM
>  > > To: GRASSLIST at baylor.edu
>  > > Subject: [GRASSLIST:2735] Re: i.rectify and image resolution
>  > > 
>  > > 
>  > > I copied the new datum/ellipse files over the original ones in my
>  > > grass5/etc directory. I then deleted and re-created the target
>  > > location/mapset with the resolution values, ellipsoid and map datum
>  > > you suggested. Anyway, I am still not able to specify a higher
>  > > resolution than 0.01 in i.rectify if I choose the option "2. Determine
>  > > the smallest region which covers the image". The other option ("1. Use
>  > > the current region in the target location") works apparently well.
>  > > 
>  > > Many thanks for your advice + help!
>  > > Regards, Ulf
> 
> -- 
> =======================================================================
>  Ulf Mehlig    <ulf.mehlig at zmt.uni-bremen.de>
>                Center for Tropical Marine Ecology/ZMT, Bremen, Germany
> -----------------------------------------------------------------------

-- 
Markus Neteler

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