GIS Stack Exchange
GIS Stack Exchange

Questions tagged [qgis-3]

for questions specific to the 3.x series of QGIS.

4420 questions
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Difference between Layer Definition File (qlr) and QGIS Layer Style File (qml)?

What is the difference between Layer Definition File (qlr) and QGIS Layer Style File (qml)? Which one is recommended? I have only used qlr so far. It seems store all the data displayed in the "properties" of the layer.
Ken T
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Missing "New 3D Map View" in QGIS3

I was really curious about the new 3D-Map-View function of QGIS3. Now, finally, QGIS3 just released but I'm missing the 3D Map View! It should be at View -> New 3D Map View but it…
MartinMap
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Disable showing content while moving features in QGIS 3

When moving features in edit mode, normally it shows features content (new position of features) in every displacement of mouse cursor as shown in the image. In case of small number of features, no problem. But while moving thousands of features,…
Kadir Şahbaz
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Installing QGIS3 on Ubuntu 16.04 Xenial: dependency problem

I am trying to install QGIS3 on my Ubuntu 16.04 Xenial. Following the instructions on the QGIS Website I added the following lines to my sources.list: deb https://qgis.org/ubuntugis xenial main deb-src https://qgis.org/ubuntugis xenial main I…
user116945
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QgsVectorFileWriter.writeAsVectorFormat differents QGIS 2 QGIS 3

A long time ago I wrote a plugin for my own use. The plugin works fine in QGIS 2.18 but not in QGIS 3.1. I used the script 2to3 and solved most problems.The only problem I am left with is the following. First my code that I use. import…
NvBgm
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QGIS 3 relationship strength "Composition"

is there somebody who can explain the usage of the relationship strength "Composition" in QGIS 3? What can the user do in detail when setting to "Composition"? Relationship strength sets the strength of the relation between the parent and the child…
geofee
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Using shared database authentication settings for organization environment?

My company is willing to share common QGIS3 configuration parameters between its users (ie. proxy configuration, WFS/WMS connections definitions, database connection definitions). For doing this, the documentation explains how to use a global…
johan wauzi
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QGIS 3.4 many-to-many relations in forms

On QGIS Attribute Forms, I want to display related Features which are connected via a many-to-many relationship table: Tables / QGIS Layers: Feature a: a_id, geometry, some more attributes Feature b: b_id, geometry, some more attributes Join table:…
Sebastian Schmidt
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Is there a QGIS 3 setting to completely turn off plugins?

I would like to turn off all plugins without uninstalling them. I usually do this while testing to rule out an issue being caused by a plugin. I am looking for the QGIS equivalent to the ArcMap Administrator setting BlockAddIns being set to…
Jay Cummins
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Using an animated GIF as a symbol in QGIS

Is there any possibility to use an animated GIF as a symbol marker in QGIS? I am working on real time lightening data, so I would like to make something like this: https://lyn.met.no, so far I have this: https://vimeo.com/565362710 Using a…
MortenSickel
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Interpolation with Breaklines- How to Apply Breaklines as Surface Discontinuties

I can't seem to get Breaklines to behave as defined here with the QGIS 3 (3.10 today) built-in Interpolation (TIN or IDW) . In my case I am preparing a subsurface structure map with geologic faults (Breaklines) with vertical displacements. Contours…
Joel
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Is it safe to delete .qgd files in QGIS 3?

I am managing some of my QGIS 3 map files in a git repository. With QGIS 2, the map files (.qgs) are text files, which can be easily handled by git; QGIS3 introduces an additional binary file (.qgd) which presumably stores some auxiliary…
tinlyx
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Where is the heatmap tool in QGIS 3.0?

I cannot find the heatmap tool in QGIS 3.0. I read that it has been moved from "Raster" to "Processing" but I cannot find it in processing either. Update: I do not see "Interpolation" under "processing"
Erich Purpur
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QGIS: copying a value from one row to another one in the attribute table?

I'm trying to replace the values of the column A and B by the value of the row 1 and row 2 of column C. (15B70C should be replaced by 63F200 and 94JH5 by 35V145) How can I automate that in the simplest way possible?
Linda
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QGIS 3.10.2. Projection Problem

Updating QGIS to the new version I have serious projection problems: I am loading a shape-file from STATISTIK AUSTRIA (an offical authority in Austria) with the following projection: PROJCS["MGI / Austria Lambert", GEOGCS["MGI", …
Kurt
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