Questions tagged [qgis-3]
for questions specific to the 3.x series of QGIS.
4,544 questions
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How to dimension and observe distances and dimensions or lengths of map elements in QGIS 3.4 [closed]
To inform interested parties about the zoning and impacts of the Municipal Regulatory Plan on various properties, I need to learn how to dimension areas in QGIS 3.4 to graphically indicate distances ...
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QGIS Rendering stops and progress bar running with geometry errors
I've recently started to experience an issue whereby my session stops rendering the map and the map render progress bar (not quite sure what it is actually called) in the bottom is constantly running/...
- 3,870
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QGIS Form // Attached tool / Big performance problem for table opening
I work with Windows with QGIS 3.34.13-Prizren.
I have a Qgis project destined to be shipped on a tablet for the field (Qfield).
The project contains a polygonal layer of 3427 objects (file shp). There ...
- 1,106
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Identity tool in QGIS cause some parts to shift, especially when working with large shapefiles
I'm working with the Identity tool in QGIS 3.34.7-Prizren (SAGA Next Gen 1.1.0), using two shapefiles: Hansen data (36 MB)
and boundary data (1.35 MB)
The result shows some shifted parts (leaving some ...
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107
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QGIS with 10m DEM produces pixelly hillshade. How to smooth out?
I am using QGIS 3.44. I have a 10 m DEM. I am trying to make a map for print that is quite large at 62.5" wide and 83" high. My hillshade always becomes very pixely and was wondering if ...
- 199
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67
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Rule based categorizing of layer styling in QGIS leaving out empty categories
I use QGIS Server to publish data for maps on my monicipality's website. I have a dataset with data in potentially nine different categories but with quite few features all together so that several ...
- 11
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36
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WFS BBOX not being sent
I'm experiencing very inconsistent behaviour with QGIS WFS connections, not through PyQGIS, but through the GUI (I have't tested in PyQGIS). Using the debugging log I can see that sometimes QGIS doesn'...
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Embossing parts of map as "pop-up" with "Geometry-Generator" in Symbology
I have embossed (pop-up) parts of my map by adding a symbol in the Symbology section. As type of the symbol-layer I have selected "Geometry-Generator" and selected "Polygon/Multipolygon&...
- 75
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122
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Saving results in already created GeoPackage with QGIS graphical modeler script
I have a QGIS graphical model. I want to save the results in an empty GeoPackage (just with one dummy layer).
The PyQGIS script below works and creates the wanted GeoPackage beforehand, but now I want ...
- 967
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145
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Using Model Builder "enumeration" input with multiple string values to populate field using QGIS Field Calculator [closed]
In QGIS Model Builder, I’m using an "enumeration" input that allows the user to select from multiple string values (e.g., "option1", "option2", "option3").
I ...
- 1,138
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Catch or Suppress GDAL Error when using QgsRasterLayer in a standalone script
I am trying to get raster sublayers from fileGeodatabase using gdbLayer = QgsRasterLayer(gdbPath, "OpenFileGDB", "gdal") in a standalone pyqgis script and I am getting this error.
...
- 156
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130
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Cannot Merge Raster files in QGIS
I am getting the error
RuntimeError: Cannot allocate result buffer
when I am trying to merge two raster TIFF files in QGIS. Both files are saved on the drive. Files have some overlapping parts. By ...
- 25
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94
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Exporting aliases I/O names from vector layer attributes to GeoPackage using PyQGIS
I want to export a vector layer to GeoJSON file, but with some field aliases. Presently, I'm exporting it with fields only.
fields = ["field_1", "field_2"]
idxs = [layer.fields()....
- 133
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Convert raster DEM (digital elevation model) to CAD for 3D modelling
I got a digital elevation model as a raster file (1 meter resolution, area of interest 10 Acres). I want to convert it to a real 3D model-file, that I can use in FreeCAD for further 3D modelling. What ...
- 113
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Merging rasters but ignoring NoData from one of rasters only in QGIS
Let's say I have three raster files: "Germany", "Hamburg", "Dresden".
Only one of those rasters, i.e. "Hamburg", contains "NoData" that I would like ...
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