Re: [GRASS-user] nviz script don't work
Hello, At first - can You use NVIZ without any scripting? If Yes, then can You, please, send me script file off list? I can take a look at it. Some NVIZ parts are quite fragile and thus might be accidentally broken. Maris. 2011/5/17, Bornemisza Imre b...@freemail.hu: Hi, dear GRASS-Users, do you have idea, why nviz my fly-script don#39;t plays? Environment: VMware Player 3.1.3 build-324285 (on WinXP) (because I haven#39;t access to install a real Linux) Ubuntu 10.04.2-desktop-i386 (because 11.04 was instable) the install command was on the just installed Ubuntu: sudo apt-get install gdal-bin grass grass-doc GRASS version: 6.4.0RC5 script was made by d.nviz, the running commands: d.nviz -ice input=elevation.dem output=fly_01 dist=3000 ht=2000 frames=1000 nviz command:nviz elevation=elevation.dem vect=roads color=landuse script=fly_01.nvscr nviz answers: Loading raster map elevation.dem@PERMANENT... 100% Loading raster map landuse@PERMANENT... 100% Vector map roads@PERMANENT loaded (757 features) Entering script mode ... DONE! , but nothing moves. (If the answer in the Archives, send me please the URL and the method to find it next time.) Thanks for your help: Imre Bornemisza - born_AT_freemail_DOT_hu ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Error while exporting
Markus Metz wrote: The NULL value of the reclass map is not recognized as NULL value, but instead treated as a valid number. This seems to be a bug in the GRASS library, specifically in G_get_null_value_row() and has probably been around since GRASS 6.3. AFAICT, it has been around as long as G_get_null_value_row() has existed. G_get_null_value_row() returns the raw data, without any reclass applied. As it stands, this function probably isn't of much use. Remove? No, fix (as per r46323). If you only care about whether a cell is null or non-null, reading and decoding the actual data is needless overhead. If you need to read the data anyhow, then use that rather than reading the null data a second time (the raw data is cached, but conversion and masking will be re-done). r.out.gdal was the latter case, so it shouldn't have been using that function. OGSF is also the latter case, and should be fixed. r.neighbors is the former case (it's used for the the selection= parameter), so it should be using Rast_get_null_value_row(). There may be other modules which should be doing this but are actually reading the data. -- Glynn Clements gl...@gclements.plus.com ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Creating a coordinate image?
Jonathan Greenberg wrote: Is there any way to take a GRASS raster and generate two outputs where each pixel is the center coordinate of that pixel (e.g. you will have one x- image and one y-image)? I'm trying to produce a latitude map for solar calculations. r.mapcalc 'xmap = x() ; ymap = y()' -- Glynn Clements gl...@gclements.plus.com ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Re: Using temp files in Grass Script
Original-Nachricht
Datum: Tue, 17 May 2011 13:11:41 +0100
Von: Glynn Clements gl...@gclements.plus.com
An: Johannes Radinger jradin...@gmx.at
CC: grass-user@lists.osgeo.org
Betreff: Re: [GRASS-user] Re: Using temp files in Grass Script
Johannes Radinger wrote:
I found that thread about temporary maps...
e.g in my case in my python script i use:
#Convert river from vector to raster format
grass.run_command(v.to.rast,
input = river_gen,
overwrite = True,
output = river_raster,
use = val,
value = res)
#Thinning the rastarized river
grass.run_command(r.thin,
input = river_raster,
overwrite = True,
output = river_raster_thin)
and here is the map river_raster only temporary for the thinning
process and the river_raster_thin is used for further calculations.
At the moment I have a g.remove to remove the river raster after
the thinning process but should I handle that with temporary files/maps
and if yes how is that exactly done in my python script?
1. In general, you should make an attempt at ensuring that temporary
map names won't conflict with any existing map name. The usual
approach is to include both .tmp and the PID in the map name, e.g.:
import os
...
global tmpmap
tmp_map = 'river_raster.tmp.%d' % os.getpid()
2. Deletion should ideally be handled using an exit handler, e.g.:
import os
import atexit
import grass.script as grass
tmp_map = None
def cleanup():
if tmp_map:
grass.run_command('g.remove', rast = tmp_map, quiet = True)
def main():
global tmpmap
tmp_map = 'river_raster.tmp.%d' % os.getpid()
...
if __name__ == __main__:
options, flags = grass.parser()
atexit.register(cleanup)
main()
Using an exit handler ensures that the temporary map gets removed
regardless of how the script terminates (e.g. if it terminates due to
an exception).
Thank you for your nice examples how to do that with tmp files and the exit
handler.
Just some questions:
1) is the PID also used on windows systems? so can it be integrated in a script
which also windows users want to use? Is it correct that the PID is the same
value for running the whole script one time?
2) what exactly does the global tmpmap?
3)I've got a lot of tmp-files which will be created during the process, so is
there and option to tell the g.remove that all maps containing .tmp.%d' %
os.getpid() in the end should be removed instead of typing all the tmp map
files into the list of g.remove.
4) so the whole thing works that in the end all the tmp maps are deleted after
the processing of the script and after an exception etc.
/johannes
--
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[GRASS-user] using not so common characters in Python Script
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
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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
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[GRASS-user] Using d.vect in python script
Hi all, It's my first grass python script using all the bells and whistles (g.parser gui construction and the grass.run_command) so I might be asking something silly. Can I use d.vect and d.rast commands in python script so that the map is displayed in the GUI? I'm running the grass script inside the command console window. For instance, if I type: d.vect munic in the command console, the munic vector is displayed in the GUI but, if I put grass.run_command(d.vect, map=munic) in a python script and run this from the command console, nothing happens. Thanks for the help Daniel ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Convert Floating Point Raster to Integer Raster
Techies, In ArcInfo I used to write .aml code to covert Floating Point Grids to Integer Grids. Doing this produced a .vat table in the new Integer grid thereby giving me elevation data which i could then used to develop painted DEMS. Question...? Would r.mapcalc or r.reclass be the tools I would use?..could someone share some example code how I would make this conversion? I will sum. Bonjour. Michael D. Morin mmo...@cassblue.com ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Convert Floating Point Raster to Integer Raster
r.mapcalc integer_map = round(fp_maps) On Thu, May 19, 2011 at 7:04 AM, Michael Morin mmo...@cassblue.com wrote: Techies, In ArcInfo I used to write .aml code to covert Floating Point Grids to Integer Grids. Doing this produced a .vat table in the new Integer grid thereby giving me elevation data which i could then used to develop painted DEMS. Question...? Would r.mapcalc or r.reclass be the tools I would use?..could someone share some example code how I would make this conversion? I will sum. Bonjour. Michael D. Morin mmo...@cassblue.com ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
