Hi everyone,
I'm still hoping to get this working. Below is a sample script I would
like, but the GRASS call via SEXTANTE does not produce an output or
raise any errors, although it does print the help for the function.
Any suggestions?
Thank you,
Martin
import sys
import os
sys.path.append(/usr/share/qgis/python/plugins)
sys.path.append(os.getenv(HOME)+/.qgis/python/plugins)
import PyQt4
import sextante
import qgis
import qgis.utils
def main():
app = PyQt4.QtGui.QApplication(sys.argv)
qgis.core.QgsApplication.setPrefixPath(/usr/lib/qgis, True)
qgis.core.QgsApplication.initQgis()
sextante.core.Sextante.Sextante.initialize()
run_script(qgis.utils.iface)
def run_script(iface):
this shall be called from Script Runner
sextante.alglist()
sextante.alghelp(grass:r.los)
dem = sys.argv[1]
out_uri = sys.argv[2]
x = sys.argv[3]
y = sys.argv[4]
sextante.runalg(grass:r.los,
input=dem,
coordinate=,.join(x,y),
output=out_uri)
if __name__==__main__:
main()
On Tue, May 28, 2013 at 2:41 PM, Victor Olaya vola...@gmail.com wrote:
Definitely that sounds interesting, and I guess that SEXTANTE is a
right choice for reimplementing your ideas.
about calling algorithms from python, if you are mainly going to use
GRASS ones, you can probably do it without SEXTANTE, but using
SEXTANTE will allow you to get more functionality.
I would suggest you to start by writing a simple SEXTANTE algorithm
that calls the algorithms needed for you model. I could help you on
that, and then we can see how to maybe take it out of the normal
QGIS/SEXTANTE framework to allow it to be executed without the full
QGIS GUI (I uderstand that is what you are looking for)
feel free to contact me if you need more help
2013/5/28 Martin Lacayo mlac...@stanford.edu:
Hi Filipe and Victor,
Yes, I am part of the software team working on InVEST. I am currently
working on transitioning the aesthetic quality (viewshed) model from
our 2.0 ArcGIS dependent framework to a 3.0 ArcGIS independent
framework. Part of our 3.0 framework is a standalone QT based GUI, for
which we hope to enable command line calls (see issue 813 in our
repository invest-natcap.googlecode.com) eventually, but it currently
set to a medium priority. I understand that once that is working it
would be fairly simple to add a wrapper in SEXTANTE, right? There are
a lot of factors that go into the development decisions for InVEST, so
while I can't say specifically that there is a plan to bring InVEST to
QGIS, but the changes we are making should make that very possible.
In the meantime, I am faced with the challenge of transitioning the
aesthetic quality model away from ArcGIS with the hopes that SEXTANTE
can address this and other geoalgorithms needs.
Any insight or advice would be much appreciated.
Thank you,
Martin
On Tue, May 28, 2013 at 1:51 PM, Filipe Dias filipesd...@gmail.com wrote:
Hi, you are working on InVest right? If so, have you considered making
InVest inside Sextante Toolbox? In CC I'm copying Victor Olaya, who is the
main developer of Sextante so he can help with that.
As a QGIS user it's very exciting for me to know that you are working on
bringing Invest into QGIS.
Regards
Filipe Dias
On Tue, May 28, 2013 at 7:43 PM, Martin Lacayo mlac...@stanford.edu wrote:
Hello,
I would like to make external calls to SEXTANTE with a Python script
or via the command line. I'm interested in using all the
geoalgorithms, but in particular I am interested in the GRASS
geoalgorithms, and specifically in r.viewshed at this moment. Is this
possible?
I found this post which seems very close to answering the question:
http://gis.stackexchange.com/questions/28701/how-to-run-sextante-algorithms-outside-of-qgis-python-console/60725#60725
However when I try calling sextante.runalg I get an error seemingly
related the fact that the code is not being run inside the QGIS Python
console (qgis.utils.iface is None).
Our FOSS software (naturalcapitalproject.org) is developed on Linux
but packaged for Windows. Any suggestions or advice? We are hoping to
reduce our development time and eliminate duplicated efforts.
Thank you,
Martin
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