66
votes
Accepted
GRASS not working with QGIS says This algorithm cannot be run
If I open QGIS with the shortcut "QGIS Desktop 3.6.0 with GRASS 7.6.0" everything works fine. If I open QGIS with the shortcut "QGIS Desktop 3.6.0" I get the same error as you.
...
- 1,336
48
votes
Accepted
What is OSGeo4W?
OSGeo:
OSGeo is an umbrella organisation (Foundation) that supports many Open Source GIS Projects. Some of the more well known ones are: QGIS, GeoServer, and OpenLayers.
Being part of OSGeo gives a ...
- 16.4k
37
votes
Merging all tiles from one directory using GDAL
You could create a virtual mosaic from all Tiff files:
gdalbuildvrt mosaic.vrt c:\data\....\*.tif
and convert it afterwards:
gdal_translate -of GTiff -co "COMPRESS=JPEG" -co "PHOTOMETRIC=YCBCR" -co ...
- 5,338
37
votes
Using OSGeo4W shell with Python 3
There's no need to edit batch files (and break python 2.7 in the process) or set environment variables manually.
Just run py3_env which sets the shell up for Python 3 automatically, then run python3.
...
- 64.9k
18
votes
Accepted
Using OSGeo4W shell with Python 3
There is a not well documented command build into OSGeo4W Shell which sets the shell up to python3 as Luke mentions
py3_env
Basically it sets your PYTHONHOME and the correct PATH. Then you can call ...
- 2,069
12
votes
Accepted
Convert raster to a CSV values and lat long based on raster value in QGIS
As GDAL supports writing to X,Y,Z (CSV) ascii, you could use gdal_translate:
gdal_translate -of xyz -co ADD_HEADER_LINE=YES -co COLUMN_SEPARATOR="," input_raster output.csv
To avoid writing NoData ...
- 64.9k
11
votes
Accepted
Compiling resources.qrc with QGIS 3.20 (could not find qt5_env.bat)
You no longer need to run qt5_env.bat and py3_env.bat (I guess). Just run
pyrcc5 -o pathtoplugin\resources.py pathtoplugin\resources.qrc
- 76.2k
11
votes
Install Python library in QGIS as non-administrator
Since you don't have admin privileges, when you install a package using QGIS Python Console/Editor as follows, it is installed to C:\Users\user\AppData\Roaming folder.
import subprocess
subprocess....
- 76.2k
9
votes
What is OSGeo4W?
Look at the OSGeo: Open Source Geospatial Foundation site. You will see that they support Desktop applications (GRASS GIS, QGIS,...), Web Mapping projects (OpenLayers, GeoServer,MapServer ...), ...
- 54.4k
8
votes
No module named 'osgeo'
Try this,
pip install --global-option=build_ext --global-option="-I/usr/include/gdal" GDAL==`gdal-config --version`
- 259
8
votes
How to install OSGeo4W libraries in older version of QGIS (2.16)?
OSGEO4W only offers the current point release, the one before (currently 2.18.3), and the dev and LTR version.
For older Windows versions, you can still grab the standalone installer from http://...
- 76.5k
8
votes
Using OSGeo4W shell with Python 3
If you want to make the change permanent you can modify the batch file OSGeo4W.bat located in your QGIS (or OSGEO) directory and just add:
call "py3_env"
below the line calling
call "%~dp0\bin\...
- 351
8
votes
GRASS not working with QGIS says This algorithm cannot be run
I had the same problem but I managed to solve it by renaming my grass folder from "grass76" to grass-7.6.0".
- 101
7
votes
Installing qgis-ltr or qgis-ltr-full with OSGeo4W or both?
qgis-ltr-full is a metapackage. I don't know exactly what packages it selects, but I believe it might select things like qgis-globe-plugin and qgis-grass-plugin in addition to qgis-ltr. You will not ...
- 4,605
7
votes
QGIS Server sending UPDATE... WHERE NULL to postgis in a WFS layer
Finally, Matthias Kuhn, one of the developers of QGIS gave me the key.
The WHERE clause is built checking the type of the primary key of the table. It should be an Integer and in some of my tables I ...
- 3,798
7
votes
Accepted
ogr2ogr commands with cmd
To debug the command, it can be helpful to echo it instead of running it, to see if any special characters are throwing things off. From inside a bat file, do:
echo ogr2ogr -sql "SELECT * FROM 'D:\...
- 4,963
6
votes
Installing File Geodatabase (*.gdb) support in QGIS
It is nice, in 2019, you do not need do above,
it is already supported in qgis 3.6.
Simple and easy by 3 steps:
Step 1: click the add vector button (red circle)
Step 2: select directory, ...
- 1,642
6
votes
Accepted
No module named 'osgeo'
This sounds like you have multiple python installations, and GDAL is installed on one and not the other.
Try the following (which I have based upon this). Create a text file within your python ...
- 2,373
6
votes
Accepted
OSGeo4W does not add bin directory to Windows PATH
is not recognized as an internal or external command, operable program or batch file
OSGeo4W specifically has closed the ticket to add this to the system path. The DLLS may conflict with other system ...
- 7,031
6
votes
How to setup Visual Studio Code (Windows) for PyQGIS 2 or 3?
We didn't want to use a script to open our workspace, so we finally found out how to configure Visual Studio Code through the settings.json file: https://github.com/isogeo/isogeo-plugin-qgis/blob/...
- 612
6
votes
NumPy array to Raster file (GeoTIFF)
By using a raster with integer values (1, 100) and one equivalent condition (myarray >= 35, myarray <= 7), following code would work as expected:
from osgeo import gdal, osr
import numpy
ds = ...
- 29.7k
6
votes
Accepted
Add FID to attribute table using ogrinfo
I found a simple way to add a rownumber with ogr
ogrinfo layer.shp -dialect SQLite -sql "UPDATE layer set ID = rowid+1"
- 365
6
votes
GRASS not working with QGIS says This algorithm cannot be run
Go to C:\Program Files\QGIS 3.12\apps\grass\grass78\ and copy the "bin" folder directly into C:\Program Files\QGIS 3.12\bin\.
Now the GRASS modules are in the specified path C:\Program Files\QGIS 3....
- 61
6
votes
Accepted
Why is osgeo4w (w QGIS 3.6.2) asking for admin rights?
The osgeo4w installer requiring admin rights is a long-standing issue. The installer requests admin rights because some features really do need to be installed as admin (they create Windows services, ...
- 64.9k
5
votes
Accepted
Loading WMS with PyQGIS
Apparently it needs a styles& in the URL, even when there is no style defined.
As the document OpenGIS Web Map Service (WMS) Implementation Specification
states on www.opengeospatial.org in ...
- 392
5
votes
Convert raster to a CSV values and lat long based on raster value in QGIS
Try this way with GDAL:
import os, sys
from osgeo import gdal
from osgeo import gdalconst
# get the arguments
InRaster = sys.argv[1]
OutCSV = sys.argv[2]
# open the raster and get some ...
- 25.6k
5
votes
Accepted
Reading various (non-.shp) vector types using ogrinfo
ogrinfo is meant to be used on single datasets. GDAL's Shapefile driver "treats a whole directory of shapefiles as a dataset, and a single shapefile within that directory as a layer" but that really ...
- 10.8k
5
votes
Reading various (non-.shp) vector types using ogrinfo
Directory of shapefiles is a special case for GDAL/OGR and it behaves like a datastore with many layers as you have noticed. As far as I know no other driver has similar behavior. You can test all ...
- 63.2k
5
votes
Using OSGeo4W shell with Python 3
Please make sure that py3_env to initiate the python with OSGEO Shell is not working. The right command is pythonw if you have the current version of QGIS (3.20).
5
votes
Accepted
Export spatial data from SQL Server to ESRI shapefile
If that is the exact command copied from your terminal, you simply need to be more careful with the spelling; there are spaces between quotation marks and the output file string. Try and replace your ...
- 29.3k
Only top scored, non community-wiki answers of a minimum length are eligible