Re: [GRASS-user] Cartografia
Hi Nuno This list is in english and mostly about GRASS related issues. Your question is neither. Since you are posing a very specific question about availability of geological data charts in a portuguese district, It'd be better to ask about it at a more appropriate place. Maybe try the local portuguese OSGEO chapter's mailing-list? Best regards ;) 2011/7/6 nunosousa84 nuno_sousa_1...@hotmail.com: Boa tarde a todos, Alguém sabe de alternativas para obter a cartografia digital geológica à escala 1:25000 em particular para o distrito de Viseu (n.º167,168,157,158,147,148)? O LNEG tem mas os preços são descomunais. Abraços, Nuno Sousa View this message in context: Cartografia Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user -- ___ ___ __ Ricardo Garcia Silva ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] using not so common characters in Python Script
Hi António
I usually start all my python scripts with the following two lines:
#!/usr/bin/env python
# -*- coding: utf-8 -*-
The first line is nice for linux users. The second line ensures that I
can write non-ASCII characters in my code.
In your case, just add this second line to your script and make sure
it is either the first or second line of the script.
I recommend adding both lines to the top of the file, as a good practice.
If you'd like to know more just check out the link that the grass
error is giving you.
Cheers
2011/5/18 António Rocha antonio.ro...@deimos.com.pt:
Greetings
I would like to include some sentences with characters like á ã àó in my
grass.message strings. It seems it's not possible Because I get this
grass.fatal(_('á'))
I get:
File C:/local/scripts/x.teste, line 41
SyntaxError: Non-ASCII character '\xe1' in file
C:/local/scripts/x.teste on line 41, but no encoding
declared; see http://www.python.org/peps/pep-0263.html for
details
Is it possible?
Thanks
Antonio Rocha
__ Information from ESET NOD32 Antivirus, version of virus signature
database 6132 (20110518) __
The message was checked by ESET NOD32 Antivirus.
http://www.eset.com
___
grass-user mailing list
grass-user@lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/grass-user
--
___ ___ __
Ricardo Garcia Silva
___
grass-user mailing list
grass-user@lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] GRASS'c Python core function to use as g.mlist
Hi Jenny
Because I got this error:
p=grass.mlist_grouped ('rast', pattern=pattern,
mapset='PERMANENT')
This command runs fine on my system (by replacing 'pattern' with a
valid pattern string'). Maybe it is a version problem? I'm running
GRASS 6.4.0 on Ubuntu 10.10, coming from the ubuntugis-unstable
repository.
If I avoid using mapset I get a dictionary variable in which, each entry is
the list of rasters for each MAPSET.
Maybe you can solve your problem by discarding the rest of the output.
If you only want the rasters present in the 'PERMANENT' mapset and
since mlist_grouped returns a dictionary with mapset names as keys,
you can keep just the value associated with the 'PERMANENT' key. So,
you can just do:
# returns a list with rasters present in the 'PERMANENT' mapset
p = grass.mlist_grouped('rast', pattern=pattern)['PERMANENT']
On Mon, Mar 14, 2011 at 3:00 PM, Jenny Turner jennyturner1...@gmail.com wrote:
Hello Ricardo
Thanks for your feedback but the problem is that mapset cannot be used as
input.
Because I got this error:
p=grass.mlist_grouped ('rast', pattern=pattern,
mapset='PERMANENT')
TypeError: mlist_grouped() got an unexpected keyword
argument 'mapset'.
If I avoid using mapset I get a dictionary variable in which, each entry is
the list of rasters for each MAPSET.
Am I doing something wrong?
Thanks
Jenny
On Fri, Mar 11, 2011 at 2:29 PM, Ricardo Filipe Soares Garcia da
ricardo.garcia.si...@gmail.com wrote:
Hi Jenny
Long story short: use your command like this (note the asterisk on the
'pattern' variable):
# python code
p=grass.mlist_grouped ('rast', pattern='output*', mapset='Mapping')
I am using the Ipython shell to script grass. It has a cool feature,
that if you type the name of a function followed by two question
marks, you can see the source code of the function (as long as it is
coded in python itself).
So, in doing:
grass.mlist_grouped??
It is possible to see that the mlist_grouped function is internally
calling the 'g.mlist' command with only the 'm' flag.
Reading the documentation for the g.mlist command [1], I realize that,
without using the -r or -e flags, this command accepts wildcards[2] as
the 'pattern' string. The asterisk (*) is the wildcard character for
substituting for any zero or more characters. So, in order to get a
string that starts with 'output' and after that can have anything, you
just type 'output*'
[1] - http://grass.fbk.eu/grass64/manuals/html64_user/g.mlist.html
[2] - http://en.wikipedia.org/wiki/Wildcard_character#Computing
On Fri, Mar 11, 2011 at 12:10 PM, Jenny Turner
jennyturner1...@gmail.com wrote:
Greetings
I'm doing a GRASS Python Script where I need to list a set of raster
maps
but I'm not using its exact name but a basic regular expression (r flag
in
g.mlist function).
So I want to find a list of rasters with output on its name:
p=grass.mlist_grouped ('rast', pattern='output', mapset='Mapping')
But I get null entries because no raster map is named output only
output01
output02 output03 ...
I want to list all raster maps with output on itsd name. How can I do
this
using grass.mlist_grouped?
Thanks
Jenny
___
grass-user mailing list
grass-user@lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/grass-user
--
___ ___ __
Ricardo Garcia Silva
--
___ ___ __
Ricardo Garcia Silva
___
grass-user mailing list
grass-user@lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] GRASS'c Python core function to use as g.mlist
Hi Jenny
Long story short: use your command like this (note the asterisk on the
'pattern' variable):
# python code
p=grass.mlist_grouped ('rast', pattern='output*', mapset='Mapping')
I am using the Ipython shell to script grass. It has a cool feature,
that if you type the name of a function followed by two question
marks, you can see the source code of the function (as long as it is
coded in python itself).
So, in doing:
grass.mlist_grouped??
It is possible to see that the mlist_grouped function is internally
calling the 'g.mlist' command with only the 'm' flag.
Reading the documentation for the g.mlist command [1], I realize that,
without using the -r or -e flags, this command accepts wildcards[2] as
the 'pattern' string. The asterisk (*) is the wildcard character for
substituting for any zero or more characters. So, in order to get a
string that starts with 'output' and after that can have anything, you
just type 'output*'
[1] - http://grass.fbk.eu/grass64/manuals/html64_user/g.mlist.html
[2] - http://en.wikipedia.org/wiki/Wildcard_character#Computing
On Fri, Mar 11, 2011 at 12:10 PM, Jenny Turner
jennyturner1...@gmail.com wrote:
Greetings
I'm doing a GRASS Python Script where I need to list a set of raster maps
but I'm not using its exact name but a basic regular expression (r flag in
g.mlist function).
So I want to find a list of rasters with output on its name:
p=grass.mlist_grouped ('rast', pattern='output', mapset='Mapping')
But I get null entries because no raster map is named output only output01
output02 output03 ...
I want to list all raster maps with output on itsd name. How can I do this
using grass.mlist_grouped?
Thanks
Jenny
___
grass-user mailing list
grass-user@lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/grass-user
--
___ ___ __
Ricardo Garcia Silva
___
grass-user mailing list
grass-user@lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Running an external executable file from a Python Script
Hi (Olá) in order to figure out what is your current working folder (or active folder) you can do # python code import os os.getcwd() # end of code This will return a string with your current working folder. As Glyn is stating, if you are going to call this external binary from within a python script you can use a grass.Popen object (or just a normal subprocess.Popen). The grass.Popen object allows you to capture your external binary's output and (eventual) error messages. In the following example, I'm running the 'ls -l' external command, using the /home/Documents directory as a working directory for the external command. Please adapt to your problem / operating system: # python code import grass.script as grass externalCommand = [ls, -l] # note that it is a list externalProcess = grass.Popen(externalCommand, stdout=grass.PIPE, stderr=grass.PIPE, cwd=/home/ricardo/Documents) sdtout, stderr = externalProcess.communicate() # to show the output of your external program print(stdout) # end of code Hope it helps ;) 2011/3/10 Glynn Clements gl...@gclements.plus.com: António Rocha wrote: My question is, when I'm running a GRASS python Script what is my active folder in order to place there my Parameter file? Or, is there any way to change my active folder while I'm running GRASS python Script? By active folder, I presume that you're referring to the current directory (aka working directory, current working directory or CWD). This is inherited from the calling process; e.g. if you run a script from a shell, the script's current directory will be the shell's current directory. When executing a command via subprocess.Popen(), you can specify its current directory via the cwd= parameter. The grass.Popen() and grass.call() functions accept this parameter, as do all of the grass.*_command() functions for running GRASS modules. You can change the current directory for the current process using os.chdir(), but that should normally be avoided, as any relative filenames will then be interpreted relative to the new current directory, whereas the user probably intended them to be relative to the initial current directory. -- Glynn Clements gl...@gclements.plus.com ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user -- ___ ___ __ Ricardo Garcia Silva ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] WinGRASS: Error when importing GRIB files
Olá António On my windows VM, I have an older osgeo4w install, that hasn't got GRIB support available. Maybe thats your problem as well? Run the command gdalinfo --formats through the osgeo4w shell. Look for the GRIB format at the output. If you cannot find a line that says GRIB there, your GDAL doesn't support it, and GRASS won't be able to read it, as it depends on GDAL. 2010/11/29 António Rocha antonio.ro...@deimos.com.pt: Hi I'm using WinGRASS (6.4.1) in Osgeo4w and I'm having a problem in the import of GRIB files. I'm using r.in.gdal, as I have used in Linux, and I'm obtaining the following error: ERROR 4: `C:\Data\GISDataBase\GRIB_codes\new03.grib' not recognised as a supported file format. What might be missing? Thanks Antonio __ Information from ESET NOD32 Antivirus, version of virus signature database 5657 (20101129) __ The message was checked by ESET NOD32 Antivirus. http://www.eset.com ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user -- ___ ___ __ Ricardo Garcia Silva ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] elevation profile
Hi I think r.profile[1] can probably help you get to the output you want. In the past I had looked into doing the exact same thing as you. I ended up using SAGA GIS[2], as it has a predefined module that does exactly this task, and I was in a hurry ;) Good luck [1] - http://grass.itc.it/grass64/manuals/html64_user/r.profile.html [2] - http://www.saga-gis.org On Thu, Jul 15, 2010 at 8:41 PM, John C. Tull jct...@gmail.com wrote: Hi John, You will likely get a more complete answer from others, but you seem to be on the right track with v.drape. From there, you can add a column for cumulative length with v.db.addcol, then run v.to.db with option=length to add a length column to your 3d vector. You might be able to subsample from there. Another possibility would be to run v.segment to generate points at your desired length interval for the original vector. Then you could run v.drape on the resulting points file and work from there or somehow pipe the point coordinates into r.profile. Good luck, John On Jul 15, 2010, at 12:25 PM, John Callahan wrote: Hopefully a quick question that I'm struggling with. (I'm a long-time GIS user but trying to move my work to GRASS and other FOSS4G.) I'm using GRASS 6.4 RC6 on Windows XP. I have a raster grid representing elevation at 2meter resolution. I have a line shapefile representing roads (about 20 roads total). I would like to get ASCII text files of x,y,z at about 1 or 2 meter intervals along each road. Any ides of what I can try? I thought v.drape might work. This converts my 2D road shapefile to 3D, but I'm not sure where to go from there. And this doesn't help getting 1 or 2 meter intervals. I also tried r.profile but this requires input as a listing of x,y coordinates, not shapefiles. I know there's a step here I'm missing. - John ** John Callahan, Geographic Information Scientist Delaware Geological Survey, University of Delaware URL: http://www.dgs.udel.edu ** ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user -- ___ ___ __ Ricardo Garcia Silva ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] grass 6.4 rc5 and python scripting
how/where do you set the variable? it needs to be set before GRASS begins. I have set the GRASS_ADDON_PATH variable in my ~/.bashrc, like this export GRASS_ADDON_PATH=/home/ricardo/gisProjectos/grassAddons in the gnome menu entry prefs do you have start in terminal ticked? Yep, it actually says Application in Terminal, and it is selected -- ___ ___ __ Ricardo Garcia Silva ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] network analysis: cost columns and v.net.alloc problem
Hello list I have a problem with the setting up of a vector map for network analysis: - I have two cost columns associated with the cost of traveling on each direction of arcs (so the afcol and abcol). - It happens that on some arcs (representing streets) sometimes it is not allowed to travel in one direction, and in that case the cost is set to -1 - Now I have a set of points that I can connect to the network and then I want to calculate sub-nets for each point (using v.net.alloc) - When I connect the points to the network (using v.net), new lines get created to expand the network and link it with the points - These new lines get created and are assigned the cat of the main line from which they got extruded - The problem is: it happens that the cost associated with the main arc gets assigned also to this new line that connects the point to the network. This is due to the fact that both lines share the same cat (the key to the attribute table) - So if the main line had a cost of -1 assigned to one of the travel directions it means the new line will also have this same cost. This will make it impossible to travel (to or from, according to the affected column) to the point in the end of this line. This fact will cause the v.net.alloc algorithm to not assign a subnet to this point, since it is in fact inaccessible. - Since both the main arc (the one belonging to the actual street) and the sub-arc (the one that just connects the point to the network) share the same cat, and thus the same entry in the attributes table, how can I fix the costs on the sub-arc without affecting the main one? - The only way I managed to uniquely reference these sub-arcs was with their internal ID (which I can see when I interactively query the vector's properties), but I can't seem to do much with it So, if I'm still making sense, can someone please offer some advice on how to solve this? - Will I have to manually delete the sub-arcs and then digitize them myself? It could work on this case, where I have only 9 points to connect, but if I had more... Thanks for your help -- ___ ___ __ Ricardo Garcia Silva ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] grass 6.4 rc5 and python scripting
Hello list I compiled grass-6.4.0RC5 (downloaded a tarball from the main site). I'd like to learn about scripting grass with python. Following the first sample script at the GRASS Python scripting library (http://download.osgeo.org/grass/grass6_progman/pythonlib.html) I created a test file called teste.py, and placed it on the Desktop. When I try to run it inside a GRASS session I am geting the following error: GRASS 6.4.0RC5 (aeigT3):~/Desktop ./teste.py sh: teste.py: not found Traceback (most recent call last): File /usr/local/grass-6.4.0RC5/etc/wxpython/gui_modules/menuform.py, line 1931, in module GrassGUIApp( grassTask( sys.argv[1] ) ).MainLoop() File /usr/local/grass-6.4.0RC5/etc/wxpython/gui_modules/menuform.py, line 335, in __init__ xml.sax.parseString( getInterfaceDescription( grassModule ) , processTask( self ) ) File /usr/local/grass-6.4.0RC5/etc/wxpython/gui_modules/menuform.py, line 1748, in getInterfaceDescription raise IOError, _(Unable to fetch interface description for command '%s'.) % cmd IOError: Unable to fetch interface description for command 'teste.py'. The file contents are just a copy+paste from the online example. Can someone point me to the cause of the error? Thanks in advance -- ___ ___ __ Ricardo Garcia Silva ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] grass 6.4 rc5 and python scripting
Thanks for your help Now I'll get on with the program! Hopefully I'll be able to build a script that can find the nearest hospital to an accident site on a vector network working ;) Cheers On Tue, Jun 30, 2009 at 2:51 PM, Martin Landalanda.mar...@gmail.com wrote: Hi, 2009/6/30 Ricardo Filipe Soares Garcia da ricardo.garcia.si...@gmail.com: Following the first sample script at the GRASS Python scripting library (http://download.osgeo.org/grass/grass6_progman/pythonlib.html) I created a test file called teste.py, and placed it on the Desktop. When I try to run it inside a GRASS session I am geting the following error: to launch wxGUI interface you need to copy teste.py to $GISBASE/scripts. Anyway CLI works in every case ./teste.py --help Martin -- Martin Landa landa.martin gmail.com * http://gama.fsv.cvut.cz/~landa -- ___ ___ __ Ricardo Garcia Silva ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] grass 6.4 rc5 and python scripting
Hello all Thanks for your good advice. I decided to go with the option of EXPORTing the grass addon path and put my scripts there, which works ok, well... kind of. It happens that when I launch GRASS from the terminal, the GRASS_ADDON_PATH gets correctly added to the PATH and I can load my test script. However, if I start GRASS from the gnome menu (or gnome-do) the GRASS_ADDON_PATH gets ignored. Maybe theres some config file that I have to tweak? On Tue, Jun 30, 2009 at 5:54 PM, Michael Bartonmichael.bar...@asu.edu wrote: It really does work. It's pretty nice. I don't know how .grassrc6 handles separators--GRASS specific or OS specific. Michael __ C. Michael Barton, Professor of Anthropology Director of Graduate Studies, School of Human Evolution Social Change Director, Center for Social Dynamics Complexity Arizona State University Tempe, AZ 85287-2402 USA voice: 480-965-6262; fax: 480-965-7671 www: http://www.public.asu.edu/~cmbarton On Jun 30, 2009, at 9:31 AM, Hamish wrote: Michael Barton wrote: 3. Set the GRASS_ADDON_PATH variable in the .grassrc6 file (or its equivalent in GRASS 7). For example, I could add... GRASS_ADDON_PATH: /Users/Michael/Desktop;/Users/Michael/Documents ...and any script on my desktop or in my documents folder would be accessible to g.parser and GRASS. (Note: I'm not sure if ; or something else should be the separator between paths). This is very convenient for having a permanent folder outside the main GRASS distribution location where you can put any custom scripts. does that really work?? it should be an environment variable, not a g.gisenv GRASS variable. the path separator on UNIXes is ':', the path sep on MS Win is ';'. but those shouldn't be needed here (unless you want to define multiple addon dirs). Hamish ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user -- ___ ___ __ Ricardo Garcia Silva ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
