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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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Create a map of different bat locations across two towns using OpenStreetMap [closed]

I'm very early on in the project and haven't used QGIS before. To begin with I want to have my project focus on two towns that I can easily jump between without any lag, I'm just wondering if this is ...
louis roberts's user avatar
3 votes
1 answer
65 views

QGIS Labeling expression to format a values list in a series of 2 columns of 2 records

From a layer of overlapping points (identical coordinates) containing the field "RC", I'm using the following expression to make the label of unique values: array_to_string(array_distinct(...
Ingrid Ingravida's user avatar
1 vote
1 answer
43 views

Importing layer data to QGIS from UMAP and converting it into correct Coordinate Reference System

I have drawn some polylines in the UMAP and saved them as a layer. Later, I figured out that QGIS is more suitable for my project. Then, I am trying to export the data from UMAP to QGIS. The data can ...
Light's user avatar
  • 17
1 vote
0 answers
44 views

Grouping data points based on proximity and minimal count of attribute in QGIS

I am using QGIS to map animal counts on farms in the Midwest US and using a circle polygon to show where there are more than 30,000 animals between all the farms in that specific area. Each data point ...
Ryan Whalen's user avatar
1 vote
0 answers
25 views

NetWorkErrorException when running QuickOSM plugin in QGIS

I can't run the QuickOSM plugin in QGIS. I have tried reinstalling the plugin but it doesn't work This is the log from Python error: Traceback (most recent call last): File "C:\Users/LISBETH/...
Lisbeth Adventiana's user avatar
1 vote
1 answer
25 views

How to set projection for Pacific-centered raster

I have a project in QGIS that I need to add a raster file to (.nc). The projection is EPSG:4326, but its boundaries are 0 to 360. How can I center the raster over the Atlantic ocean (180). Or, change ...
tony_c_graphics's user avatar
0 votes
1 answer
25 views

Need to convert a layer of QGIS line intersections into nodes

In order to use the GAMA ABM software's driving skill functionality, I need to import a file of line segments containing the roads and a file of nodes containing the road intersections. I want to use ...
Kevin A's user avatar
3 votes
1 answer
49 views

Merging attributes from line layer and polygon layer in QGIS

I am using QGIS 3.32 and have a grid layer with hexagons (so polygons) and a line layer. I would like the hexagons, which are overlapping the line layer to "take on" the attributes of the ...
jtheb's user avatar
  • 73
0 votes
0 answers
18 views

Issue with authoring attribute driven text label SLDs for QGIS

I'm attempting to create attribution-driven SLDs, for text labels, that will work within QGIS. This is giving me issues and I'm not quite sure how to proceed. As a simplistic example of what's ...
GbHeathcoteOS's user avatar
1 vote
0 answers
25 views

Raster upside down in QGIS

I have raster which, when opening on QGIS, the map turns out to be upside down. I tried fixing the data gdal_translate -of netCDF -co WRITE_BOTTOMUP=NO meancount_25.nc meancount_25_fixed.nc. Is there ...
proy's user avatar
  • 95
2 votes
1 answer
25 views

Aggregate function with two polygon layers resluts in incorrect attributes when using Filter = intersects

I have 2 polygon layers (Property Boundary, Land Cover) and what I am trying to do is have it so that when I add a new polygon feature in Land Cover, it inherits the attribute information from my ...
nola's user avatar
  • 89
0 votes
1 answer
38 views

Spatial selection of intersected entities within a shape does not take the new entity

I'd like to retrieve part of shape A from layer A in relation to the boundary of my layer B. After making an intersection, I end up with a new layer, "intersect_layer". Using spatial ...
MesanGeo's user avatar
0 votes
0 answers
52 views

Difference of circle buffer area to calculated area in QGIS

When I create a circular buffer around a point feature in QGIS 3.36.3-Maidenhead in EPSG:25832 of a 10 km radius with 1000 segments I get 313961275.193 m² as a result. I calculate the area by typing $...
m4D_guY's user avatar
  • 49
0 votes
0 answers
26 views

Model designer crashes when applying layer styles

I have a problem with the designer model. I'm looking to automate the application of layer styles via the model designer. I have several layers over several years using the same style that I saved. So ...
CARA Guillaume's user avatar
0 votes
0 answers
18 views

scp landsat not showing

why not showing landsat in preprocessing obtion?c I cannot find Landsat in my preprocessing toolbar. I have only preprocessing options of clip raster bands, image conversion, masking bands, mosaic ...
sh kim's user avatar
  • 1
0 votes
0 answers
24 views

Extracting Road Sections where Footpaths Exist in QGIS

I am trying to see if it's possible to extract the road network in QGIS, but only where there is a footpath along that section. This is so that we have a line representing footpaths but on the road ...
Joshua J Geoghegan's user avatar
0 votes
1 answer
32 views

Aligning separate datasets with different CRS in QGIS for the purposes of terrain modelling

I would like to develop a 3D model of a site located in Vermont, USA. I will be using the state's LiDAR dataset which I am pretty comfortable with. However, I need to coordinate this topographical ...
Carlos Guzman's user avatar
0 votes
2 answers
70 views

Labeling a multiline layer in QGIS

is there any methode to create a line next to my multiline feature indicating where it starts and ends and display the length (available as one of my fields) on it at the same time? Since my line is ...
Juan Sebastian Barajas Narvaez's user avatar
0 votes
0 answers
26 views

Using fields defined from other functions in QGIS Model Designer

I'm creating a rough service map for multiple states and providers based on publicly available FCC Data. I have recently switched over to QGIS and am trying to build a simple model. I need to dissolve ...
Stuart Miller's user avatar
0 votes
0 answers
39 views

QGIS Cannot reopen GeoJSON file after saving

I've recently encountered an unexpected issue with QGIS. When creating and editing a new GeoJSON file (collecting polygons), everything goes smoothly until I try to save. Occasionally, I receive the ...
ReutKeller's user avatar
  • 2,169
0 votes
0 answers
29 views

Fixing Semi-Auto Classificaton Plugin

Recently I did analysis with SCP and I notice it can change the system processing ram so I curiously changed that hopefully the program will process data faster. But it was a mistake I guess because ...
Ghulam Husein's user avatar
0 votes
1 answer
48 views

Loading comma separated value into QGIS 3.36.3 is problematic [closed]

I have a West Virgina oil and gas well CSV file. I tried to load it to a layer using the 'Add delimited text layer' option. It did load but utterly mangled the layer attributes upon conversion. I ...
Carl Huxohl's user avatar
0 votes
0 answers
37 views

How to merge rasters with the QGIS modeler

Using the QGIS modeler, I want to automate the following sequence: 1: Filter point clouds, 2: Convert each slab obtained into DEM 3: Merge all MNT with the model below, I only obtain a fusion of a ...
fcka's user avatar
  • 985
0 votes
0 answers
27 views

QGIS - qgis2threejs exporter not displaying layers

I'm new to using the qgis2threejs exporter. I'm trying to use a satellite base map and then my point data has x, y, z. They appear as expected in QGIS, but aren't appearing in the qgis2threejs ...
user832190's user avatar
0 votes
1 answer
61 views

Georeferencing a historical map -

I am georeferencing a historical map and then trying to harmonise it with polygons from another file. I am trying to think about the best way to do this with respect to setting control points. To give ...
Cola's user avatar
  • 1
0 votes
0 answers
19 views

Python errors using QGIS and Google Earth plugin

I'm new to this and I'm trying to use QGIS with the Google Earth Engine and PlanetScope plugins but I got this message, 2024-06-25T15:43:01 CRITICAL Authentication Manager : Retrieving ...
user247408's user avatar
0 votes
0 answers
34 views

Remove pixels from a raster in QGIS

I have a raster map and I would remove isolated pixels or groups with less than 4 adjacent pixels. How can I do it in QGIS?
Salvatore Praticò's user avatar
0 votes
0 answers
34 views

Raster calculator substraction does provides wrong values TIN interpolated raster (QGIS)

new here. The objective is to calculate the volume of contours I made, I've tried with very simple geometries with no luck (half a sphere in this case). I contours I made were TIN interpolated with ...
LauraTechrem's user avatar
3 votes
2 answers
244 views

Forcing QGIS to export using left hand rule

I've downloaded some polygons to import them into a SQL Server geography instance for some testing. My issue is that every time I export them to a .csv file using QGIS 3.36.3, the Polygons are output ...
Just_Some_Guy's user avatar
1 vote
0 answers
34 views

Place labels as close to centroid as possible without collision in QGIS

In QGIS, I want to print a map to a PDF and use labels for my polygons with the following criteria: Show all labels The labels do not collide The labels are placed as close to the centroid of the ...
00koeffers's user avatar
0 votes
0 answers
32 views

QGIS/GDAL warp(reproject) throws 'ERROR 5: dfMax should be strictly greater than dfMin' when run in Python script

I have ~ 150 .xyz-files (DEMs) which I try to reproject. When I reproject them within QGIS via raster -- > warp everything works fine. First I tried the batch processing option with warp(reproject)...
i.i.k.'s user avatar
  • 1,709
1 vote
1 answer
47 views

Coloring a QGIS Map with an RGB Column, and Creating a Legend that follows the same color

I'm working on a project in QGIS where I need to color a map using RGB values from a specific column in my dataset (RGB). However, I also need to create a legend that shows the units with their actual ...
Cicada73's user avatar
1 vote
1 answer
45 views

QGIS using Geometry Generator to connect multiple points within a layer separately

I have a CSV layer containing roughly 50,000 individual point vectors of vessel tracking data. The attribute columns are date/time, latitude, longitude, vessel ID and vessel name. Some vessels have ...
Lane Simkin's user avatar
5 votes
1 answer
169 views

Rendering polygon by two variables in QGIS

I have a set of polygons with two variables "variable 1" which can take values A, B, C, D, and E and "variable 2" which can take values V, W, X, Y and Z. I would want to render the ...
Stephen Clark's user avatar
0 votes
1 answer
99 views

Displaying two different layers in the same coordinate systems in QGIS

This looks like an easy solution but, for the life of me, I cannot manage to solve this. I have browsed this website where solutions were provided but unfortunately, none have produced the desired ...
Olivier Hubert's user avatar
2 votes
2 answers
74 views

Raster Calculator - Batch Processing

I have 30 raster files from 1981 to 2010. Every raster has 12 bands, again corresponding to dates from June 1 to June 12. I want to calculate the mean for all the bands from 1981 to 2010. Normally, I ...
proy's user avatar
  • 95
0 votes
0 answers
28 views

Can't set different font sizes for labels in QGIS

I use the Easy Custom Labeling plugin to draw lines along which inscriptions are placed (curves). The font size is set by itself, although I set certain parameters, and the size is displayed as it ...
GeoEth's user avatar
  • 385
0 votes
1 answer
98 views

Incorrect distances when measuring on QGIS, leading to buffers and density maps being much larger

I have created a boat traffic map on QGIS 3.36.2. Here, I have a vector layer containing different points connected to show the boat routes in the Andaman and Nicobar Islands in India. To ensure that ...
Amisha Nakhwa's user avatar
-1 votes
0 answers
69 views

Advancements in QGIS on ARM

I'm looking into getting a new Surface Pro with ARM processor. Will I be able to find a workaround to run QGIS?
Josh Wilde's user avatar
0 votes
0 answers
52 views

Extracting border from shapefile and then calculate distance to the border

I started with a states boundaries shapefile. I want to extract a part of state border and then calculate the distance of village centroids to the nearest point on this border. I have already ...
Ak2020's user avatar
  • 1
0 votes
0 answers
18 views

Importing GeoTIFFs in GeoServer with Float32 type bands

I have a system where users can import GeoTiff files with float32 type. When importing these files into QGIS, the application automatically applies color enhancements using cumulative count cut with a ...
Vahe Karamyan's user avatar
0 votes
0 answers
30 views

Not finding EPSG:2964 while setting CRS to work on Albers Equal Area for Alaska dataset

I want to work on Alaska dataset as guided by the QGIS manual that is provided in the portal for which I am providing the link - https://docs.qgis.org/testing/en/docs/user_manual/introduction/...
Amulya's user avatar
  • 1
0 votes
0 answers
44 views

Error saving KML as shapefile using QGIS

I have imported a .kml as vector, worked on that and saved after some addition in the data. The error message received is: Export to vector file failed. Error: Creation of layer failed (OGR error: ...
AbuYahya's user avatar
0 votes
0 answers
19 views

Filtering legend items to only show one instance in an atlas or report

Trying to generate an atlas or report, and my QGIS has a layer copies in several locations. My coverage layer/ control variable goes something like this. I have a map item and a legend Item 1. ...
Cleverer's user avatar
3 votes
1 answer
220 views

Khmer Language is not properly displayed in layer fields in QGIS

I have created a new shapefile layer which uses Khmer language fields. The encoding is UTF-8. When I create new fields in Khmer in the attribute table it displays perfectly. Then as soon as I hit save ...
Tim Frewer's user avatar
0 votes
0 answers
24 views

Filtering QGIS atlas output by later groups

I have a QGIS project that has layers arranged in groups. I want to generate an atlas that will produce a separate map for each group based on the layers. I would also like to include a legend that ...
Cleverer's user avatar
3 votes
1 answer
94 views

Trouble with QGIS .shp files and .dbf files

I am currently trying to add a series of files called "LotNumber", it has a .dbf and .shp file that has already been made on ArcMap. When I try to add a vector layer in QGIS and add either ...
Devin's user avatar
  • 31
1 vote
1 answer
31 views

QGIS modeler adding field with a pre-calculated value but doesn't work after first successful try

Using the modeler, I want to add a new column to my layer. The new column will be used as a label and consists of a number and strings: for example "layername" and "length". Both ...
QGIS-beginner's user avatar
0 votes
0 answers
36 views

Python Error on QGIS 3.34.X

I installed QGIS on my computer but it encounter a python error as show below. I am not an expert on GIS. 2024-06-21T15:19:19 WARNING Python error : Couldn't load plugin 'rastertool' due to an ...
Spokesman1's user avatar
-1 votes
0 answers
22 views

Plugin or external function

I want to use two tables in QGIS with which I want to achieve the following. TabA should contain project names and TabB should contain log entries, i.e. a 1:n relationship. When entering a new log ...
FlyingEagle's user avatar