On Jan 24, 2008, at 8:34 AM, Nikos Alexandris wrote:
Michael,
thank you for these important details for new GRASS users (like
me). On
the web I have found some good resrources for bash scripting. Is there
something for Python (for beginners) and maybe GRASS-oriented as well?
Thank you,
Nikos
On Thu, 2008-01-24 at 08:28 -0700, Michael Barton wrote:
On Jan 24, 2008, at 6:52 AM, [EMAIL PROTECTED]
wrote:
Date: Thu, 24 Jan 2008 05:12:03 -0800 (PST)
From: "Gabriele N." <[EMAIL PROTECTED]>
Subject: [GRASS-user] v.coordinate.sh - improve this script?
To: [EMAIL PROTECTED]
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=us-ascii
Hi list.
I made a script (attached) for the definition of interactive text
file
(containing the coordinates input and output) to be loaded later in
v.transform.
It is useful to write automatically coordinates in the text file.
Operation is simple:
- A load map (not georeference) and the map B (which may be
raster or
vector) and will open 2 monitor.
- We need to move the first monitor to the side of the second
monitor.
- Proceed doing a zoom (if necessary) on the first monitor (A map)
and then
identifying the input point (GCP) with one click. After this
transaction
will be made to locate the point on the second monitor (B map).
The pairs of points are identifying 4 (at least 4). For more points
see a
graphic which will require to continue with the process or not.
- After the inclusion of the points in your / home will be a text
file
'coordinate.txt' formatted for use in v.transform.
The script is certainly improved. For example viewing points
included (as eg
in i.points on in d.path) or shifting automatically monitors or
using snap
for the insertion points etc. ...
I have no programming experience, and I hope that someone can
help me
improve.
Gabriele
PS
Necessary installing xdialog and xmessage
http://www.nabble.com/file/p15063748/v.coordinate.sh v.coordinate.sh
--
View this message in context: http://www.nabble.com/
v.coordinate.sh---improve-this-script--tp15063748p15063748.html
Sent from the Grass - Users mailing list archive at Nabble.com.
Gabriele,
It is good to learn scripting of some kind because it really expands
the analytical capabilities of GRASS. However, I'm not sure why you
are trying to create a bash script for interactive georectifying.
i.points already does with with xmonitors. However, this will not
work on Windows because it doesn't support the underlying socket code
for the monitor drivers.
The TclTk GUI already has a more sophisticated replacement for this
function that works on all platforms.
Also, given issues (long known) that we've run into again with
running bash scripts on Windows, I think that now is the time to
begin to strongly encourage GRASS users and developers to try to
begin shifting their scripting to a platform that works on all OS's.
Since the new GUI will be in Python, I strongly suggest that we start
developing new scripts in Python and for anyone with time on their
hands ;-) start to create Python versions of existing scripts. The
more scripts that are available in Python, the more people will make
sure that Python is installed and will take a look at it, which will
lead to more scripts in Python, etc...
Already, a Python script can pop up the same TclTk GUI that a bash
script can, and has the option of popping up a wxPython GUI if this
is installed.
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>
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--
Nikos Alexandris
.
Department of Remote Sensing & Landscape Information Systems
Faculty of Forestry & Environmental Sciences, Albert-Ludwigs-
University Freiburg
.
Tel. +49 (0) 761 203 3697 / Fax. +49 (0) 761 203 3701 / Skype:
Nikos.Alexandris
.
Address: Tennenbacher str. 4, D-79106 Freiburg i. Br., Germany
Hi Nikos,
There is a Python scripting guide on the GRASS WIKI at <http://
grass.gdf-hannover.de/wiki/GRASS_and_Python>
There are many excellent tutorials for Python listed on the Python
home site <http://www.python.org>, including the 'learn Python in 10
minutes' tutorial at <http://www.poromenos.org/tutorials/python>.
There are also many books availale.
Python is much easier to work in than bash, as well as much more
powerful. It is also fully cross-platform meaning that your scripts
will work on Windows, Mac, and Linux. Since Python is also free and
easily downloaded, everyone can install it.
I strongly recommend that you work with the current version--2.5.1--
although we are trying to support 2.4 in the GUI.
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>
>
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