[GRASS-dev] image rectification from command line only ?
michael.barton at asu.edu
Tue Mar 4 13:58:58 EST 2008
I don't know of any documentation for this. I guess just look at
existing examples. Perhaps make a test case and rectify them in.
That's what I did when working out the format for the GUI versions of
this. You'll have to make a group and put the file into the group
Michael Barton, Professor
Professor of Anthropology
Director of Graduate Studies
School of Human Diversity & Social Change
Center for Social Dynamics & Complexity
Arizona State University
Tempe, AZ 85287-2402
voice: 480-965-6262; fax: 480-965-7671
On Mar 4, 2008, at 11:32 AM, Nicolas MERLET wrote:
>> -----Original Message-----
>> From: grass-dev-bounces at lists.osgeo.org
>> [mailto:grass-dev-bounces at lists.osgeo.org] On Behalf Of Michael
>> Sent: Tuesday, March 04, 2008 6:38 PM
>> To: grass-dev at lists.osgeo.org
>> Subject: Re: [GRASS-dev] image rectification from command line only ?
>> On Mar 4, 2008, at 10:00 AM, grass-dev-request at lists.osgeo.org wrote:
>>> Date: Tue, 4 Mar 2008 17:04:27 +0100
>>> From: "Nicolas MERLET" <admin at merletn.org>
>>> Subject: [GRASS-dev] image rectification from command line only ?
>>> To: <grass-dev at lists.osgeo.org>
>>> Message-ID: <018801c87e11$6d0d9690$6642000a at NICOLAS>
>>> Content-Type: text/plain; charset="us-ascii"
>>> hi all,
>>> i need to rectify an image automatically (i assume using
>> i.points and
>>> i.rectify). as far as i've been able to see, i.points is to use in
>>> monitor mode ? so does anyone know how to use it from the command
>>> line (and
>>> only from the command line) ?
>>> thanks for helping...
>> i.points lets a user interactively set ground control points (GCPs)
>> for an unrectified image, using a rectified image. This particular
>> process cannot be automated since it is interactive by definition.
>> However, if you already know the ground coordinates of a set of xy
>> points for an image, you can build a POINTS file and i.rectify will
>> georectify the image from the command line.
> that would be enough as my GCP are pre-calculated. however i haven't
> any documentation about the POINTS files structure. where can i find
> it ? (i
> just have http://grass.itc.it/gdp/html_grass63/i.rectify.html)
> moreover, assuming we use i.rectify there's no paramater to give
> points, so
> i suppose i just have to copy my POINT file in my image group so that
> i.rectify will be able to find it ?
> again, thank you very much for helping !
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