All Questions
42,191 questions
2
votes
1
answer
66
views
Orthographic projection extent in QGIS
I have a world-map-layer in QGIS, such as the one by typing "world" in the coordinate box.
I then set the project-crs to a custom orthographic projection. The world-layer gets reprojected on ...
- 1,379
1
vote
0
answers
46
views
Create line segments from points
I successfully coverted *.fit files to a *.sqllite database that I then imported to QGIS. I have a layer called trackpoints that I processed using Geometry by expression to create the features from ...
- 301
0
votes
0
answers
60
views
How to preserve layer transparency when creating virtual layers in QGIS?
I have about 500 raster layers. I have applied transparency settings (deleting the background white color) to all of these layers. Now I want to merge all these layers without losing resolution by ...
- 149
0
votes
0
answers
33
views
Misalignment using a QGIS exported .tif when reading it with Leaflet on R
I'm using QGIS 3.34.11 and I've georeferenced an image (that was in a custom Albers projection) that fits the OSM standard map on the back according to what i expected and well enough for my purposes. ...
1
vote
0
answers
34
views
Deriving subtended angle in QGIS
Is there a tool to calculate the subtended angle between an observer & observed point(s)?
I've searched on "angle" and generally hunted, but not found anything.
- 619
0
votes
0
answers
44
views
QGIS adding field to multiple layers
is it possible to add a new field to multiple layers (with same geometry)? Layerstyles will only save the style. When I need the same field in all of my point layers, I must do this step by step and ...
- 51
0
votes
0
answers
44
views
Virtual layer combined with x layer in group (QGIS)
Is it possible to combine a virtual layer with a layer in group? For my project:
I create a group "A"
place a point layer "A"
place a virtual layer "A" with a little ...
- 51
0
votes
1
answer
63
views
QGIS Batch processing for minimum bounding geometry?
I wouldn't call myself a QGIS "expert" so I'm asking for any recommendations/solutions.
During a project I've collected individual animal locations in a zoological institution in 10 min ...
- 9
1
vote
0
answers
47
views
Classifying spatial data using QGIS [closed]
I have two files: geologie.dbf and Legenda_Geologie.xls. I need to classify some regions within the area that I am studying but I am not exactly sure how to do that.
Do I need to manually type the ...
- 11
2
votes
1
answer
114
views
Same CRS but different location in QGIS
In QGIS I have two files supposed to be located in the same area but they're not overlapping.
The first one is a shapefile of buildings downloaded with projection "CH1903 / LV03" and ...
- 21
1
vote
0
answers
95
views
Error when importing DWG file in QGIS
In QGIS 3.34.9 I am trying to import a DWG file (from Autodesk AutoCAD 2019) into QGIS using the Import tool (Project > Import/Export > Import files from DWG/DXF), but I can´t.
What am I doing ...
2
votes
1
answer
83
views
Selecting and cropping certain area in QGIS
In QGIS I don't know how to crop an area of geologie within the boundaries of my studied area, which is UAT_Iasi.
Can you please give me some suggestions?
- 21
0
votes
0
answers
39
views
QGIS 3D map not showing labels
I am trying to get labels to show up in the QGIS 3D map viewer. I can see the label in the viewer, if I don't add the symbol to the 3D view, under layer styling.
However, as soon as I add the symbol ...
- 363
0
votes
1
answer
55
views
QGIS copy fields in empty geopackage or reset FID
How to copy all fields and styles in a new geopackage without features? I will create a new geopackage. I´ve saved the style from an other geopackage and import this in a new geopackage. All styles ...
- 51
0
votes
0
answers
39
views
Raster Calculator in QGIS 3.40 results into two satellite images side by side
I am currently working on two Sentinel-2 images. I want to use the downloaded images to calculate the NDBI.
Initially, I mosaicked the Bands 8 (NIR) and 11 (SWIR) of the two different Sentinel-2 ...
- 1
0
votes
0
answers
66
views
Exporting shapefiles from QGIS to Unreal Engine
I am a beginner with QGIS and Unreal Engine.
I have a shapefile of rivers.
What steps do I need to take to export the shapefile from QGIS so that it can be utilized in Unreal Engine and align properly ...
- 1
0
votes
1
answer
61
views
Correct non-matching edges between polygons in QGIS
In QGIS the processing algorithm 'Validate Coverage' identifies cases of non exactly matching edges between adjacent polygons. Like in the picture below : although vertices 1. 2. and 3. of the left ...
- 23
0
votes
0
answers
52
views
QGIS 3.38.3-Grenoble Points to path drawing lines that are not part of the track
I am working on a project for measuring the effort from our GPS tracks. The tracks were imported from .gpx files only with track_points.
When I use the Points to path for some tracks the lines are not ...
-1
votes
1
answer
64
views
Finding detailed info about QGIS Expressions [closed]
I am using QGIS Expressions for showing images in DISPLAY hints:
After some trail and error the following works:
<img src= "file:///[% @project_folder || to_string('/BILDER/') || "BILD&...
- 7,235
0
votes
0
answers
30
views
QGIS and constraints with groups
I will make two fields 'group' and 'group feature' with a constraints rule, where each group have no duplicate 'group feature' id. Each feature 1 till 3 will only once per group. How can I set up a ...
- 51
2
votes
1
answer
108
views
"Failure connecting to API: HTTP Error 403: Forbidden" error when geocoding CSV file using MMQGIS Plugin in QGIS
I'm not sure what's going on, but has anyone encountered this error?
My CSV contains addresses, city, province and country, which are all found automatically by the plug-in. When I execute the request,...
- 21
2
votes
0
answers
34
views
Labelling feature with count of values from another layer in QGIS
I have a layer A with 900+ features. There are two relative attributes: cpl (text) and number (integer).
The attribute cpl has 50 variations and the attribute number has 3. Each feature is unique but ...
- 33
5
votes
0
answers
63
views
Adding a `new line` symbol to a layer name in the QGIS layer table
Currently, you can copy and paste the text with a newline break and it will appear normally in the name of any layer in the QGIS layers window.
Is there any way to create a newline break using the ...
- 8,208
1
vote
1
answer
58
views
How can I rasterize a vector object, while keeping it's height value?
It's a simple building, with a height of 60 meters.
I tried using the vector-raster tool, but I ended up with a 40 GB object(?), that won't show up on the map. And then I used TIN interpolation (...
- 13
0
votes
0
answers
20
views
How to keep the python console open in QGIS? [duplicate]
How to make sure the "python console" and the "editor" are open upon launching QGIS? I tried searching in the Python Console Tab in the "Settings > Options" but could ...
- 3,349
1
vote
0
answers
22
views
Error in QGIS when translate rasters and using the clip raster by a mask layer tool
I have been working on 2 separate projects with raster data. For one I have been trying to clip the raster by a masking layer and the other one I have been trying to convert/translate the data. For ...
- 11
1
vote
1
answer
44
views
QGIS expression to symbolise road condition between values
I am using QGIS 3.22.16. I try to symbolize a road condition. The result wanted is:
Equal 2 if Minor > 0.3
Moderate > 0.2
severe > 0.1
Equal 1 if
0.2 < Minor <0.3
0.1 < Moderate <...
- 360
4
votes
1
answer
63
views
Curve or align the legend to a curved map frame
Is it possible to curve a legend to align with a circle frame in the layout view? For example in the image below, I would like to either curve my legend along the outside of the grey circle or the ...
- 367
1
vote
0
answers
52
views
Polygon misalignment issue
I've been tasked with coming up with a flood evacuation plan for a neighborhood, but the shapefile I've been given has misaligned polygons. The layer CRS is EPSG:3380 - GDM2000/Selangor Grid
Any ideas ...
1
vote
0
answers
33
views
QGis CRITICAL Layer vlayer (virtual layer)
While export offline with QField sync I´m getting follow error:
CRITICAL Layer vlayer : Error while executing feature count request : Query preparation error on SELECT Count(*),Min(MbrMinX("&...
- 51
1
vote
0
answers
34
views
QGIS: DB Manager query returns data, but when I load the layer the attribute fields are empty
I'm querying data in DB Manager and my query works (see attached image) and when I load it in as a layer the geometry displays properly, but the layer's attribute table is empty (see second image). It ...
- 11
1
vote
1
answer
86
views
Creating temporal raster (timeseries) in PyQGIS
QGIS can animate a temporal raster using the Temporal Controller. I am trying to programmatically create a layer in Python that can be animated in this way.
What I can do so far is to create a numpy ...
- 13
0
votes
0
answers
33
views
QGIS- Do Triggers Bypass Default Values in SpatiaLite?
I'm working with SpatiaLite and using triggers to update or insert data into other tables.
Is it expected behavior, or could it be a bug, that when I insert a new feature using a trigger, such as:
...
- 825
0
votes
0
answers
45
views
Executing SQL select against OGR datasource without listing every table
My aim is to filter and join multiple tables, then display as points in QGIS. I'd like to do this in a single vrt definition. My issue seems to be that if I don't define the tables in the ...
- 81
1
vote
0
answers
45
views
Problems to install QGIS on Debian 11 (Bullseye) after 25/October/2024
I have been used QGIS-ltr in Debian 11 for a long time, but QGIS vanished of my computer at October 27, 2024.
I have limited knowledge about Debian.
Then, I ran "sudo apt autoremove" and ...
0
votes
0
answers
39
views
QGIS Print Layout layers can't be rotated without the map boundaries also rotating
QGIS 3.38.3 Windows 11 Home
After creating Shapefile layers in a project, I then created a print layout showing the layers. After inspecting the print layout I saw that I'd achieve a better display ...
- 997
0
votes
1
answer
116
views
What plugin is this? [closed]
Not sure where is best to ask this but I saw a guy in a YouTube tutorial use the below icon/plugin(?) when drawing lines on QGIS. Just want to know what it is? He was drawing nice curves, is it a ...
- 19
5
votes
1
answer
271
views
Export QGIS attribute table as Excel sheet changes column order and sorting
In the attribute table of a layer in QGIS, I can re-organize my columns and sort my data according to my needs. When I export my layer as an Excel file, both my column organization and sorting ...
- 2,691
0
votes
2
answers
43
views
Can't select Bold [closed]
I have a text in the layout, but can't select the bold option. I can do it through html, but the boldness ins't enough.
What is the problem?
I have the 3.36.1 version.
0
votes
1
answer
66
views
Measuring distance from house to Natural Park [closed]
We have built a house and are being prosecuted for building within 2km of a natural park.
How do I check?
0
votes
1
answer
75
views
Resize the QdialogButtonBox when the entire QGIS window is resized (Qt Designer)
I am creating a QGIS plugin with Qt Designer and want the QDialogButtonBox (the box containing the OK and Cancel buttons) to resize when the main window is resized. In the default QGIS dialogs (see ...
- 792
0
votes
0
answers
30
views
Unable to read TIFF data in QField
I am trying to upload my QGIS project to QField Cloud. Unfortunately I always get an error concerning the TIFF file.
This is the error:
Warning! Your QGIS project may not work as expected on QField.
...
- 1
1
vote
0
answers
34
views
Size problem in QGIS clustering
I've configured cluster symbols for point features, utilizing the "Assistant" sizing method linked to a specific attribute. However, when multiple features form a cluster, the symbol size is ...
- 39
0
votes
0
answers
27
views
Points with Z (depth) values in QGIS 3D view
If it is possible to visualize points (x,y) that have, in addition, z (depth) column, on that certain depth value, in QGIS 3D view, then how do I do it?
Perhaps a plugin has to be used, for that ...
- 659
6
votes
2
answers
111
views
Save and load column arrangements in QGIS
In QGIS, I sometimes work with layers that have many columns in their attribute table. I can arrange these columns using the 'organize columns' function to suit my needs. Occasionally, there are up to ...
- 2,691
1
vote
0
answers
50
views
Unexpected behavior with custom transparency of raster in QGIS 3.24.3
I have noticed an unexpected behavior while playing with custom transparency of a single band raster (Digital elevation model; .flt format).
I mistype the transparency value I wanted and made it 500% ...
- 11
2
votes
0
answers
43
views
Is it possible to mask a raster based on a quartile of the pixel distribution using QGIS?
I have a DEM of a crop canopy. It's pretty trivial in QGIS to draw a polygon and calculate the average or median height using zonal statistics. However that often underestimates the overal crop height ...
- 41
2
votes
0
answers
59
views
Cesium tiles to 3D format (gpkg/cityjson/obj)
I am intending to use the amazing "Rotterdam in 3D" (https://www.3drotterdam.nl/) dataset to 3d-print. I am able to load the whole tileset as scene into QGIS.
Now I would like to export an ...
- 33
1
vote
2
answers
154
views
QGIS symbology geometry generator
I´ve create a project now with a rule based symbology and there are problems with my geometry generator. I ´ve got two point layers "buffer" and "GNSS". Both with identical styles. ...
- 51
0
votes
0
answers
31
views
Auto-Incrementing text field labels QGIS [duplicate]
I am trying to create points in QGIS & Qfield that auto-increment. For instance, Ground Control Points for drone data, "GCP-001, GCP-002... and so on" to display on the map label.
...
