Questions tagged [qgis-plugins]

Software plugins that add functionality to the QGIS package

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1answer
57 views

Why is the asc file associated with Fusion CanopyModel different from the GeoTiff I create?

I'm working in Python (using PyQGIS) to create a digital surface model from .las data. When I use fusion:canopymodel it creates a .dtm file, and a .asc file. I then convert the .dtm file to .tiff ...
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34 views

Installing plugin for Time Manage Error Manage

I've tried installing different versions and have now reinstalled both Python and QGIS to see if that made a difference however, I still can't resolve the problem. This is the error message I still ...
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28 views

Importing points within a series of non-geolocated pdf maps and Excel data

I have a series of maps that have been drawn on by hand (points and areas) that have been given to me as PDFs, along with a series of interview PDFs explaining what those points and areas are (there ...
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134 views

QGIS 3.16 and newer not commiting merge when string exceeds 255

I have been developing a QGIS plugin with PyQt5 in QGIS 3.10 for a while now. The plugin gets layers from an api, displaying features of POINT, LINESTRING or POLYGON (wtk) in layers. When the wtk-...
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31 views

Using dropdowns in Openoise plugin

I've been using the Openoise plugin successfully for several years. I haven't used it for the past 3-4 months, but when I used it this week the dropdown combo boxes in the "Calculate noise levels&...
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88 views

Problem with the alexbruy repository with plugins for QGIS

I have tried to install some of the QGIS plugins in the alexbruy repository https://plugins.bruy.me/plugins/plugins.xml, but for each plugin get the following message: Plugin installation failed: ...
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75 views

QGIS find steepest path on a DEM [Path of a drop of water]

Is there an algorithm or plugin in QGIS to find the steepest path on a DEM given a point (the path followed by a drop of water)?
4
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1answer
120 views

Plugin development for QGIS 3.16 (Windows): how to handle dependencies on external packages?

I've been working on a plugin for use with QGIS 3.16. I have developed it locally and I want to now deploy it so others can use it. The problem or rather question I'm having is: How do I deal with ...
7
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1answer
144 views

Advanced search terms in the Semi-automatic Classification plugin

Background: At QGIS 3.18.1, I can successfully download Sentinel Level-1C imagery by entering the granule that covers my area of interest (10UGU) in the Advanced search box. Now I would like to ...
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1answer
115 views

Python Error at QGIS startup

I am unable to solve the following python error in the General tab of the Log Messages when I startup QGIS: 2021-03-29T09:19:03 WARNING Traceback (most recent call last): File "C:/...
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29 views

Swath profile plugin

im trying to install the toolbox Swath profile, but the program send me an error "NameError: name 'Line_shapefile' is not defined". How can i install it?
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2answers
184 views

Zoom in layer with PyQGIS

I am working on creating a plugin on QGIS 3.10. This plugin loads two layers in my QGIS project. I would like to zoom in the layer extent of AEE_layer. Unfortunately despite the code that specifies to ...
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1answer
147 views

PyQGIS `iface` object for layer event handling in QGIS plugin testing

I'm writing a functional test for the QGIS plugin I'm developing. There's a button in the plugin that is enabled only if there is a valid vector layer present. The thing I'm bumping into is the layer ...
1
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1answer
79 views

How can I calculate the distance between multiple points in a network?

I have multiple points on multiple lines in a network and I need to know the length between these points along the network. I need an OD matrix, like the QNEAT3 distance matrices but for the distance ...
2
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1answer
156 views

QgsTask.fromFunction not running on_finished method unless an exception is raised in the task

I'm trying to create a task to process some geometry intersections in a QGIS plugin I've created. I'm following 15.2.2 Task from function from the PyQgis Developer cook book exactly as its shown. I ...
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2answers
406 views

Getting directory path from QgsFileWidget using PyQGIS

I use Plugin Builder and Qt Designer to create a plugin on QGIS. I would like to export a PDF file with results of processing. I try to use QgsFileWidget, to get the directory, but I cannot connect ...
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34 views

Reloading QGIS plugin every time to make it work

I'm not "fluent" in PyQGIS but using some tutorials I managed to put together a plugin that acquires the clicked point's coordinates and saves a QRcode containing the link to Google Maps for ...
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156 views

RS & GIS (QGIS Plugin) not producing Land Surface Temperature Layer

Recently I downloaded this plugin as it has demonstrated capability to produce Land Surface Temperature Calculated layer. I tested this plugin using the Landsat 8 contents straight from USGS Earth ...
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36 views

QgsExtentGroupBox draw on canvas causing odd behaviour

I am trying to make the most of the QgsExtentGroupBox from the Qt designer QGIS widgets in a plugin I'm building (using pluginbuilder 3.2.1, and QGIS 3.16 builtin Python 3.7 and Qt Designer). ...
2
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1answer
38 views

Quickmapservices plugin not showing Google or Bing layers

Ive installed QGIS 3.10.14 on a new windows machine and then the Quickmapservices plugin. However, when I go to the menu, it doesn't show google or bing options. Were they discontinued along the way? ...
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31 views

Is it possible to add an export button to Qgis2Web web interface after filtering certain layers?

I created a webmap with pointdata using Qgis2Web. There are a few filters available, and I would like to give users the opportunity to export the filtered points to for example a CSV or XLSX. Is that ...
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1answer
84 views

Install qgis-server-font-loader Plugin on QGIS 3.4.8 (Windows Server 2016)

I'm trying to install this plugin: https://github.com/avinet/qgis-server-font-loader. First I copied the Zip-folder in C:\OSGeo4W64\apps\qgis-ltr\plugins then I opened QGIS and installed the plugin ...
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1answer
196 views

QGIS iface.addVectorLayer() results in incorrect field length

I ambuilding a python plugin for QGIS. As part of the plugin, I do: iface.addVectorLayer(geoj, self.selectedLayer, 'ogr') This is basically adding a layer to the project, with geoj: a geojson string, ...
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0answers
42 views

Why do R scripts not show up amongst the Providers in QGIS3.18?

I have installed the Resource Sharing plugin (3.18) and have installed the QGIS R script collection as instructed elsewhere. Why do the R scripts not now show up among the Providers or in the ...
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22 views

Using QGIS (or PostGIS), determine which network featureIds are shortest path between two points

I have a network layer, and a layer of target start/end points (both as coordinate sets and as start feat_id and end feat-id). like: featid, geom and start_coord_x, start_coord_y, start_featid, ...
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32 views

How to handle NULL values in QgsExpression()?

When I try to add multiple conditions in QgsExpression() eg: QgsExpression(f"input='{abc}' OR value='{def}'") here abc = 1 and def = NULL. Even though abc is having value I am getting NULL ...
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0answers
82 views

Error when installing QAD plugin: Plugin 'qad' could not be loaded due to an error calling its method classFactory()

I am trying to install the QAD plugin and it appears this error: No se pudo cargar el complemento 'qad' debido a un error al llamar a su método classFactory() AttributeError: 'QVariant' object has ...
2
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0answers
46 views

Reverse viewshed analysis in QGIS (finding a point with the largest view of an area)

Planning a drone survey which will be terrain following at 10m above the surface. I am trying to plan where I will be controlling the drone from where I can have line of site to the drone. I have made ...
2
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1answer
500 views

QGIS 3.16 - Print layout grid coordinates in DMS?

I am trying to create a grid with coordinates printed in degrees, minutes, and seconds in print layout of QGIS 3.16. The project is defined to EPSG:32652 WGS 84/UTM Zone 52N. When I go to Grid > ...
2
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1answer
84 views

Creating points along line based on line lengths

I have a road network network (polyline shape layer) with multiple line lsegments. Each line segment has different line length as shown in image 1. I am trying to generate points along lines based on ...
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0answers
35 views

Importing Python Library Inside QGIS Plugin for all OS using Subprocess

I am writing a QGIS python plugin which needs pandas library to function. I have searched the GIS.SE and there are many similar questions but none talks about using subprocess and that if it will work ...
1
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2answers
61 views

QGIS loading a layer every 5 seconds (Threading)

Im trying to load a point layer from a CSV-file with a QGIS Plugin every 5 seconds. The Coordinates in this CSV-File which are used to locate the point layer are changed every few seconds. I tried to ...
3
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1answer
117 views

How to call QgisInterface class in a plugin

I'm trying to access the QgsLayerTreeView class through the QgisInterface class in the python plugin I have created. Ultimately I want to be able to return the selected node (group or layer) from the ...
1
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0answers
57 views

QGIS GUI not starting

Recently, I installed QGIS 3.10.14. I tried to start the application but QGIS would not start after the "setting up GUI" and "Starting Python". I also tried to uninstall QGIS and ...
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0answers
37 views

Drawing polygon around a raster (only where pixels have data) QGIS

I have a raster (grey scale image with white background [can change to e.g. green]). I want to make a polygon of the extent of the pixels with data (outline)- not the whole raster file. How can I do ...
2
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1answer
44 views

Enabling snapping on features created with PyQGIS [closed]

I have implemented a custom digitizing tool derivated from QgsMapToolDigitizeFeature class. Here is the code written to save the feature into the layer: layer.dataProvider().addFeatures([feature]) ...
1
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0answers
19 views

QGIS: Landover Analysis Dialog Box Too Small

When I open the Landcover Analysis plugin within QGIS, the information in the dialog box is overlapping and doesn't fit the window. Even if I increase the size of the dialog box. It makes it pretty ...
1
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1answer
92 views

Is there a plugin for calculating the walking time in QGIS 3

In the previous QGIS version there's this plugin: Walking time but it's not compatible with QGIS 3. Is there another plugin doing the same thing?
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0answers
52 views

Installing LecoS plug-in for QGIS v3.16 on Mac Big Sur

I am new to QGIS and was learning some spatial analysis. I have tried to install LecoS plug-in on QGIS v3.16, unsuccessfully. I have tried the All-in-one version, but when I install the plug-in I got ...
1
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1answer
196 views

Connecting Qt Designer GUI to python code in QGIS Plugin

I am creating a Plugin for QGIS 3.10 and have made a (big?) mistake. I started by creating the whole GUI in Qt Designer and the corresponding code in Qt Creator with C++. Now I have realized that I ...
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0answers
31 views

QGIS spline plugin tool cannot be imported

I'm using QGIS 3.10.14 and installed the spline plugin for digitizing curves. However, I get the error message below when I try and load the spline plugin. Traceback (most recent call last): File &...
3
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1answer
162 views

How can I control a custom parameter in QGIS WMS/WMTS/WFS webservices

GeoServer layers can be configured to be very flexible with parameters in at least these two ways: viewparams pass through to the SQL view (link) time/elevation/custom dimension (link and link) A ...
7
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1answer
86 views

Bivariate legend plugin throws NameError exception

While using QGIS 3.10 and 3.16 on Mac OS X Big Sur, the Bivariate legend plugin throws a NameError exception. How do I fix this or work around it? The following stack trace is from QGIS 3.10. The 3.16 ...
1
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1answer
31 views

Georeferencer Plugin: Installed but does not appear in raster menu (QGIS 10.3, Windows 10)

I see that others have had problems finding a rouge georeferencer window, or using the plugin. But when my student tries to use the confirmed installed georeferencer plugin in QGIS 3.10 on Windows 10 ...
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0answers
50 views

Two Separate QGIS Plugins Under one Provider

I have developed a QGIS processing plugin that has a processing provider of its own. That plugin is working fine. Now I am developing a second plugin and I want to provide it the same provider so that ...
0
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1answer
61 views

Name of QGIS Plugin

What is the name of this QGIS Plugin?
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63 views

Returned non-zero exit status 2 gdal_merge.py in QGIS plugin

I'm trying to merge several files within a QGIS plugin via gdal_merge.py. In Anaconda distribution exactly the same code works as it is like that. I suppose Python in QGIS can't find gdal_merge.py. ...
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0answers
20 views

Coordinates problems when converting DXF to SHP

I had a DXF converted by a QGIS plugin called "AnotherDXF2Shape V0.9". When I overlayed the shapefile on Google Maps, the draw is not in the same position as it should have been. The ...
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0answers
87 views

Handling multiple QGIS Plugins in one custom menu

I want to create multiple plugins (for example 'Plugin_1', 'Plugin_2', etc.) which are independent of each other, but which are organized in one custom menu. For example 'MyMenu'. I am also aware of ...
2
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2answers
159 views

Conditional statements PyQGIS

I am looking for a simple example to create a conditional statement in the pyQGIS console. Today I wrote a simple script to add a field [CAT] to a vector layer. This script can be found below. I want ...

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