Linked Questions
12 questions linked to/from Parallelising GIS operations in PyQGIS?
4
votes
2
answers
5k
views
Processing multiple files simultanously using python
I have 11000 point shapefiles to run Near tool on against another point shapefile.
I am looking for a way to process 10 files at the same time.
Is there a way to process so many files using Python ...
- 221
2
votes
2
answers
477
views
Clip lines to grid using pyQgis
I have created a regular grid of (square) polygons using Processing->Create grid.
I would now like to iterate over my grid squares and clip an underlying road network within each grid square. I can do ...
- 143
1
vote
2
answers
4k
views
Clip, or intersect, lines to polygon with QGIS
On QGIS 2.16.2, I have a polygon layer of states and a line layer of streets. What I want is all streets that lie within a certain state, either as an additional attribute or as a sub-layer.
In the ...
- 153
9
votes
1
answer
2k
views
Is it possible to do parallel processing in GDAL and QGIS?
It seems like processing a large raster dataset in QGIS can cause a crash, for example in QGIS failing to complete clip or intersect and crash dump in qgis. Is it possible to use GDAL parallel ...
- 1,024
6
votes
2
answers
2k
views
Python and QGIS multiprocessing documentation?
Where can we find better documention for python QGIS multiprocessing.
Especially regarding the multiprocessing of python and QGIS.
- 313
6
votes
3
answers
627
views
How to run qgis scripts in parallel across remote server(s)
I have a stand alone python script using qgis that I wrote with the help of the SE question here
The script takes three arguments being; an input file path, an output file path, and another input ...
- 1,441
2
votes
1
answer
803
views
Why does the QgsFeatureIterator crash in my stand alone script?
I'm trying to write a standalone script in qgis 2.10 in ubuntu
I have written a script which crashes when I run from bash but works fine from inside the qgis desktop environment. The script is:
#!/...
- 1,441
20
votes
2
answers
18k
views
Accessing QGIS processing with PyQGIS
I want to access the explode lines function in Python outside of QGIS from a standalone script.
What module do I have to load in order to use it?
How can I access processing?
from qgis.core import *
...
- 7,914
10
votes
2
answers
2k
views
Will core functions in QGIS exploit multi-threading?
After reading Enabling multithreaded processing in QGIS?, I was wondering if QGIS 2.6 will include this when running various processes. I checked online and I could only find that multi-threaded ...
- 75k
3
votes
1
answer
2k
views
arcpy with multiprocessing throws "UnpickleableError: Cannot pickle <type 'geoprocessing Layer object'> objects"
I'm attempting to speed up a process which is currently running synchronously, by using the python multiprocessing module.
I'm having trouble sending a feature layer to a function which is called by ...
- 21k
2
votes
1
answer
2k
views
Multiprocessing error in QGIS with Python on Windows?
I have this error when I try to use Manager() from python multiprocessing library.
(Just start QGIS open Python console and execute the two following lines)
>>> import multiprocessing
>&...
- 21
16
votes
3
answers
4k
views
Porting Avenue code for Producing Building Shadows to ArcPy/Python for ArcGIS Desktop? [duplicate]
Whuber provided an answer at Producing building shadows using ArcGIS Desktop? which required using Avenue code.
Any idea how to make it work in ArcGIS Desktop 10?
- 413