4
votes
Accepted
Calling Turf.js nearest point function equivalent in QGIS using a Python script
You can use the QgsSpatialIndex class which has a nearestNeighbor() method.
E.g. to iterate over a point layer, finding the nearest point and distance for each feature, you could do something like:
...
- 20.6k
4
votes
OSGeo4W updating is failing - OpenCL.dll was not found
I encountered a similar issue while installing QGIS 3.34 via OSGeo4W after a fresh Windows 10 installation. After trying for hours, I was able to solve the problem by applying the following:
...
- 76.2k
3
votes
Updating pre-3.32 HTML code in label boxes
In the composer, we now have to use the html box tool instead of the regular label box:
With this type of box the code works:
Thanks to @JGH for helping me unlock this mystery.
- 335
3
votes
QGIS text size of label is zero one decimal place if contains one decimal place
I found the problem. It was due to the installed plugin “OSM Data Sync”. Because without the plugin, it keeps the text size with one decimal place
I reported an issue to the developer.
OSM Data Sync - ...
- 61
3
votes
Accepted
"Incorrect parameter value for LAYERS" error when saving CSV to GeoPackage with PyQGIS
You can make a QgsVectorLayer of your CSV URI which will be accepted by the package algorithm.
A couple of things to note:
The %dir suffix is missing from your CSV URI in the LAYERS property of the ...
- 14.9k
1
vote
Automatically populate a field on a form from a lookup table depending on what is selected in a different field on the same form in QGIS
One option is to use a Value Relation and Filter expression.
With lookup data table as follows (layer named "data", lookup field is 'model', result field is 'code'):
Then in the data entry ...
- 3,860
1
vote
Accepted
Automatically populate a field on a form from a lookup table depending on what is selected in a different field on the same form in QGIS
One way is to use a Virtual Field.
With lookup data table as follows (layer named "data", lookup field is 'model', result field is 'code'):
I created a virtual field ('code') in my data ...
- 3,860
1
vote
Accepted
How to use 'to_dm' function in model designer?
For this instance, the answer was to have the Field Name be the resulting Field, not an existing Field. I see now there is an option 'Create New Field' that I missed.
- 31
1
vote
In QGIS 3.x for Windows, is it possible to add more files to the Project > Open Recent menu?
Yes, Settings -> Options -> Advanced -> App -> maxRecentProjects
Source : https://github.com/qgis/QGIS/issues/33720
- 43
1
vote
Cannot create layer because "unable to open database file" in QGIS 3.2.0?
I recently produced this exact same error when trying to create an gpkg output in a folder that doesn't exist yet. I added a routine that first creates the folder and that solved the issue.
# create ...
- 2,334
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