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Questions tagged [qgis]

QGIS is a cross-platform GIS application licensed under the GNU General Public License.

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4 views

.dwg visible in layer panel, not on map

I receive a .dwg file with a drawing of an installations at a particular address. Ideally, I'd use this file to add some other stuff in QGIS Grenoble. So, I use the DWG/DXF import thing: source ...
4 votes
4 answers
182 views

Creating new layer that shows the number of intersecting vector layers at each point in QGIS

I have a QGIS project file with over 50 layers, each representing a different species' habitat range. I would like to create a new layer that adds up the number of layers at each point in the map and ...
7 votes
5 answers
1k views

Keeping only internal borders in QGIS

I'm looking for the QGIS equivalent of TopoJSON's mesh function which goes through a vector layer and only keeps borders that are shared between multiple features. Here's an example of the output -- ...
0 votes
0 answers
6 views

I'm using QGIS 3.36 Maidenhead, how do I remove annotation boxes

As I said, I'm using QGIS 3.36 and I need to remove annotation boxes that I added but do not want to keep. I cannot find any option to delete or even edit them, only to add more. I've tried every way ...
2 votes
2 answers
9k views

Delete (don't hide) text annotations in QGIS

I feel like this question should have a really simple answer, but I can't find it anywhere. I added an annotation to my map while experimenting with different buttons, and it wasn't at all what I ...
5 votes
2 answers
12k views

How to convert shapefile to vector EMF?

I want to convert a shapefile to an EMF file. The EMF file must be a vector image, not a raster image. Please suggest to me some good packages or tools.
0 votes
0 answers
16 views

How to handle dynamically created buttons and their functionality at QGIS Plug-ins

I am making my first plug-in and I created a plug in with the plug-in builder. As far as I understand, and please correct me if I am wrong, the plug_in_dialog.py script should handle all the dialog ...
0 votes
0 answers
26 views

Filling each dot with information in point pattern pattern fill layer in QGIS

I create a polygon layer with a point pattern fill in QGIS. How do I label points in pattern fill?
0 votes
0 answers
7 views

How to load the last generated temporary GRB file into QGIS

A modulator generates outputs, one of them appears in the log. .... p: C:\Users\p\AppData\Local\Temp\processing_XlaQIL\f9b4c6a903984db787296bee038e79b3\CRAYFISH_OUTPUT_GRIB.grb... A .grb file is ...
1 vote
1 answer
33 views

QGIS - Retrieve the most recent value from the child table

I have a layer with objects (1_objects) whose status is regularly updated following visits. The updates are listed in the "Statuts" field of a table called 2_Statuts_suivi. I have set up a ...
-3 votes
0 answers
40 views

Import new linestring into existing QGIS layer [closed]

How can I import a new linestring into an existing multilinestring shapefile layer in QGIS.
0 votes
0 answers
30 views

QGIS Overlap analysis and R terra::intersect do not give the same results

I have performed an Overlap analysis between a Vector layer of classified values (Slope) and a series of smaller vector layers generated from KDE analysis. The aim was to produce a table with the ...
1 vote
0 answers
13 views

QGIS filled lines overlap issue [duplicate]

I want to have the hatched lines render like they are dissolved, I cannot merge them because they have different attributes so I am stuck not knowing how to fix this from layer styling.
5 votes
1 answer
895 views

gdal_rasterize failure with QGIS version 3.6.3

I have both QGIS 3.6.3 and 3.0.1 running on Windows 10 64bit. In 3.6.3 I am unable to rasterise a point layer, while the same operation seems to work in 3.0.1. I'm having to switch between versions ...
3 votes
3 answers
2k views

Adding a space in the "draw coordinates" "decimal with suffix" in QGIS v2.18.7

I am using QGIS v2.18.7. In the Print Composer I have turned on the "Draw coodinates" option "Decimal with suffix" to add these to my map. However, I need to add a space between the degrees symbol ...
5 votes
1 answer
2k views

ogr2ogr errors: PROJ: proj_create no database context specified, cannot prase CRS, proj.db lacks database.layout.version.major/minor metadata etc

I have a PostgreSQL/PostGIS database that I have been working on and it's generated in a docker container. I access it via PGAdmin to the docker DB or sometimes I create a backup and restore locally ...
5 votes
2 answers
1k views

Clustering of points based on 1 or 2 attributes

In QGIS: I have data of sightings of a particular animal that has been mapped as points. Some of these may be repeated sightings. I've classed the sightings according to 'SightCode' which represents ...
4 votes
1 answer
220 views

Determining coordinates of point B and C given distance and coordinates from point A to point B and C in QGIS

I have vessel heading, angle and distance to the animal sighting (С) and distance to point B. I need the coordinates for both points C and B. How do I go about this for many marine mammal sightings in ...
2 votes
3 answers
2k views

Incomplete export of data from a Postgres table

I'm having a serious data export problem with the PGAdmin widget and pgsql2shp (QGIS too). The problem lies within converting a PostGIS table to shapefile. I put in 3234 feature counts...and I get ...
3 votes
2 answers
512 views

Building a rectangle around a font marker using the geometry generator

In able to show labels in a legend (see my other question regarding the legend here: QGIS styling a legend) I need to show points as rectangles with the same height but a length based on the length ...
0 votes
1 answer
493 views

Make background image visible at all scales in webmap QGIS2web

I'm trying to produce a web map using the QGIS2web plug in and leaflet output, but the background image is not visible when I zoom in beyond some scale. Is there a way to control the scales a ...
0 votes
2 answers
81 views

Easiest way for non-programmers to add my script to QGIS

QGIS 3.36.2, Python 3.12.3 I've got a script (about 500 lines of code) that I add to my project and test with the "Open Existing Script" button of the Processing Toolbar (it's not formatted ...
1 vote
0 answers
14 views

Pop-up message or sound notification in QField app?

I would like to add a notification to our QField app. We have a route tracking layer (MultiLine with a real-time distance column) and a measurement (Point) layer. While route tracking, we need to take ...
0 votes
0 answers
12 views

Subbasins generated instead of whole basins via SAGA NextGen

Before I resume my comeback geofictional project in earnest, I'd like to report on another shortcoming on QGIS 3.30 (at least on my system). The version of SAGA GIS used in QGIS has a convenient tool ...
1 vote
2 answers
779 views

Unable to create Package for QField

The "Package for QField" option is inactive. It's my first project I want to transfer to QField. I'm using 3.16.11-Hannover on a Mac OS HighSierra and QField Sync 3.4.4.
1 vote
0 answers
17 views

QGIS 3.38.1-1 embedded symbols not loading

New unwanted behaviour in 3.38.1-1 (code version 3d4177afc6): embedded symbology from imported KMLs are ignored. This happens in both upgraded and new projects. I am an admin on Trailforks, and ...
0 votes
0 answers
31 views

How to add an XYZ Layer with non-standard tile grid in QGIS?

When I have a TMS endpoint, like: https://tile.openstreetmap.org/{z}/{x}/{y}.png, I know I can add it to canvas via Layer -> Add Layer -> Add XYZ Layer.... However, this assumes that the {z}/{x}/...
0 votes
0 answers
35 views

Publish WFS/WMS in QGIS equivalent to ArcGIS Server

Is there an equivalent to ArcGIS Server, on which you can publish ArcGIS projects in e.g. WMS or WFS, a way to achieve this in QGIS without a plugin? And if not, which plugin (except qgis2web, i tried ...
1 vote
0 answers
40 views

Points disappear after applying rule based symbology (QGIS Maidenhead)

Trying to colour points by a field I have in a shapefile. The data field I'm interested in is called "main_commo" I've put in the 3 rules (in this format: "main_commo" = 'LEAD') ...
1 vote
2 answers
22 views

QFieldCloud data loss after synchronising, can I retrieve the lost data?

I have recently started using QFieldloud. All was working fine, I surveyed my site with all my data stored locally on my phone. I tried to synchronise/push changes to the cloud which seemed fine but ...
0 votes
1 answer
35 views

Fields that fill in automatically

I want to create a point layer with an ID field that fills in automatically as I digitize a geometry. It's possible? How can I do?
0 votes
0 answers
20 views

QGIS raster georeferencing. Is it possible to get a table with a coordinate and a pixel corresponding to it on the ORIGINAL raster?

I have an image of some area (raster) and I need to, knowing coordinate, get pixel on that raster. But if I will use raster georeferencig, I'll get a distorted GeoTIFF. Can I get this data from ...
0 votes
1 answer
31 views

Merging two (or more) selected objects in a geojson file within QGIS

I need to merge two selected, but spatially unconnected, polygon objects into one polygon object within QGIS. They both have the same attribute value within the one attribute field. The file is a ...
1 vote
0 answers
25 views

QGIS and MapInfo projections - EPSG3301 (Estonian Coordinate system/projection: L-EST97 1 mm)

I have MapInfo .tab file with points. Tab file is created with MapInfo Pro version 2023 (release build 142). The .tab file's coordinate system (projection) is Estonian coordinate system. In MapInfo it'...
6 votes
3 answers
1k views

Calculating limits of visible horizon of location in QGIS?

I am an amateur at GIS. I installed QGIS Las Palmas version in Windows, I searched YouTube and also in Google but I didn't find this question. There is a website that one can input the coordinates of ...
0 votes
1 answer
33 views

3 of 6 1m_DEMs not loading; CRS issue [closed]

I downloaded six adjacent 1m Grayscale DEM from The National Map. When I load them into QGIS only 3 of the 6 appear as expected, the other three are just gray (no data) I started a new project in QGIS ...
1 vote
0 answers
25 views

QGIS - 2 value relation fields - automatically update the second one

I am working with two field that are using the value-relation widget. The first field named "Cd_Hab" lists the content of "IDC" from the layer "HABITATS_ATTRIBUTS". The ...
0 votes
1 answer
283 views

Burning in multiple fields when rasterizing (vector to raster) using QGIS

I have multiple attributes in a vector file which is .shp that I want to convert to a raster, this is because I want to make it the same resolution of another raster file. I will then convert that ...
0 votes
1 answer
79 views

Why is there a difference between Raw and Rendered results?

I saved two images from a Dem Tiff file in two different formats. There is no problem when saved as raw format. However, when you save it in rendered format, something like the second picture appears. ...
0 votes
1 answer
315 views

Cascading order of basins (next downstream basin) in QGIS, R, or Whiteboxtools

I am conducting a hydrologic analysis of DEMs. Suppose that I have the following basins in an area as shown below:. I need to get the cascading order of each of the basins. In other words, I need to ...
0 votes
1 answer
209 views

QGIS : mbtiles data (GeoServer) does not display

I succeed in GeoServer (2.18.1) to set a new mbtiles file. I can see the preview data (OpenLayers view) in GeoServer. Then I try to display the data throw QGIS (WMS). But the data does not display in ...
1 vote
1 answer
498 views

Exporting DXF from Revit to QGIS, loss of coordinates

I'm trying to combine Revit and QGIS. It's mostly about exporting Revit files as DXF and opening them in QGIS. Every file, no matter how I try to work with the projection in Revit (survey point and ...
0 votes
0 answers
7 views

Where to find the pg_service.cnfg file for an existing QGIS project with PostgreSQL connection? And how to make the file if the service name is blank? [closed]

I have an existing QGIS project to work on and the layers are from a postgresql connection. I want to open this project on QField on Android but it couldn't load the layers because it requires ...
0 votes
1 answer
31 views

QGIS crashes when I set the labels

I'm writing a script for QGIS, using the Python console. I noticed that when the script processes the rows about the label settings, when I delete the layer "terrFiltrati", QGIS crashes and ...
5 votes
4 answers
3k views

Changing Mouse Wheel zoom direction in QGIS?

I'm just starting to learn QGIS. I'm starting with the basic simple things. Coming from an ArcGIS background, I am used to the mouse wheel action zooming in and out the default ArcGIS way. QGIS ...
1 vote
1 answer
1k views

Error calculating LST in QGIS

I was using QGIS to calculate the LST of a city from Landsat 7 and 8 datasets. I was following online formulas to do the computation but I kept getting weird results (i.e. -17~62°C or 44~71°C; which ...
5 votes
2 answers
152 views

Selecting unsymbolised features in QGIS

In QGIS 3.34.5, I am symbolising a large area of point features extracted from OpenStreetMap. I currently have an ELSE clause that shows me the features that have not yet been symbolised in a large ...
9 votes
1 answer
1k views

GRASS v.clean tool in QGIS gives empty output

I am trying to run v.clean in QGIS 3.10.7. I have a 2D LineString dataset saved in GPKG format and I want to run v.clean to clean up some messy topology. But whenever I run it, I get the same result - ...
5 votes
1 answer
213 views

Missing measure line box/point during editing in QGIS

I've just updated my QGIS 3.4.4 to QGIS 3.10.8 and now I cannot measure distance and place points on the measured distance. As soon as I click on editing/adding a point the measure toolbox and line/...
0 votes
1 answer
24 views

QGIS 3.xx Mac Version installation clarification - What gets installed from single dmg file?

Can someone clarify what is installed exactly when I download the Mac versions of QQIS from the QGIS.org homepage? The .dmg file gets downloaded and I can drag the application to the Applications ...

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