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Questions tagged [layers]

A layer is a collection of information. It contains specific elements of a gis in a specific presentation method (e.g raster or vector layer). Layers can be edited separately in order to create individual topics for a map.

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3 votes
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QGIS rotate/translate features on several layers with different geometries simultaneously

I am working in QGIS with three vector layers (points, lines, polygons) and an aerial image. The features from these three layers are "connected", i.e. they should stay in the same position ...
Honeybear's user avatar
  • 2,504
0 votes
0 answers
33 views

QGIS CRS differs from CRS extent [closed]

I am having the same issue described in this post QGIS: CRS and CRS in extent different - what to do?, but there are no suggested fixes or answers. I have two polar grid layers, one created by me in R,...
Setophaga's user avatar
0 votes
0 answers
12 views

Create a trendline variable

i'm looking for create a variable with the linear fit data, so i can add to the map layer the new raster map with this band (variable), do you know how to do this? i want to create a raster where ...
Rodrigo Recavarren's user avatar
0 votes
0 answers
33 views

Sorting orders of layers for presentation

This is basic functionality that I use often but cannot get it to work on a particular project. QGIS 3.16. I have three symbology rules on a layer. The 'sub' layer(rule) that should be on top keeps ...
Sean's user avatar
  • 51
0 votes
1 answer
34 views

Issues loading a project with large non-local data in QGIS

I have some very large TIFFs from drone surveys that are on a Dropbox filing system. For anything to load in QGIS the file needs to be made available offline on Dropbox. Some of my projects have these ...
WillForestry's user avatar
1 vote
1 answer
51 views

Deleting GeoPackage vector layers and releasing open file handles with PyQGIS

On Windows 11 I have a PyQGIS script that creates layers from gpkg files. This all works perfectly fine. I want to delete these layers, recreate the gpkg files and reload them as layers again and this ...
John_nz's user avatar
  • 31
1 vote
1 answer
43 views

Layers corrupted after saving, closing and opening of QGIS project with PyQGIS

Using a Python script, I create a layer from a CSV file and then write it out to a gpkg file. I then create a group in the layer tree, load it in the gpkg file and add it as a child of the group. This ...
John_nz's user avatar
  • 31
-1 votes
0 answers
35 views

Option to Turn Off All Layers in Experience Builder Bookmarks

I have an Experience Builder Web App with an AGOL Web Map connected to it. The map has its own bookmarks. We had it setup in the Experimental Builder so users could click on a bookmark tab and zoom to ...
TheOmoSlide's user avatar
0 votes
0 answers
36 views

PDF output from QGIS with clickable layers AND a legend

I want to create a PDF with clickable (on/off) layers from a multilayered QGIS map - WITH - a legend and title. I can create a PDF with clickable layers which work from the map project window using ...
KLG_2640's user avatar
0 votes
1 answer
100 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
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
2 votes
1 answer
53 views

Exporting polygons to existing database in QGIS

I have exported a shp polygon file in QGIS to a table in pgAdmin. Now I have more polygons in QGIS that I want to export to the same table in pgAdmin. This means that I want to add the new polygons to ...
Alexi's user avatar
  • 71
1 vote
0 answers
63 views

splitGeometry does not produce two geometries with PyQGIS

I am working on a script that checks features for (rough) rectangularity and splits them if they are not. If I correctly understand the splitGeometry method, it should produce two geometries if ...
RavenS's user avatar
  • 11
0 votes
0 answers
29 views

Google Earth Engine: Layer becomes blurry after zooming in

Using Google Earth Engine, is it possible that when I zoom in on a layer, it becomes blurry? Is this due to insufficient clarity of the layer itself or is it due to a free account?
wow's user avatar
  • 1
0 votes
1 answer
25 views

What does the "-1" in GeoServer "Maximum number of granules to load" / "MaxAllowedTiles" mean?

I'm trying to set an ImageMosaic layer in GeoServer. The default value of the field Maximum number of granules to load is -1. Is it the same with the MaxAllowedTiles found in some examples in the net? ...
GregStef's user avatar
  • 214
1 vote
1 answer
60 views

How to apply specific styling to Group layers in the LayerList Widget

Using ArcGIS Maps SDK for JavaScript 4.24, I would like to change the formatting of Group Layers within the LayerList Widget, such that the group layers can be immediately distinguished from non-group ...
Stephen Lead's user avatar
  • 21.2k
1 vote
1 answer
69 views

Cannot copy and paste into a layer

I am having a very frustrating problem in ArcMap. (This is all within the one enterprise geodatabase.) I am trying to copy and paste a feature from one layer to another (similar layers). I have been ...
Vaughn Golding's user avatar
4 votes
0 answers
39 views

Closing connection to SpatiaLite DB in QGIS

I have a SpatiaLite DB that has been used to generate some layers in QGIS (via a PyQGIS script, using the native:extractbyextent processing tool). Once these layers have been generated, they are saved ...
Tom Brennan's user avatar
  • 5,249
0 votes
0 answers
27 views

QGIS: display a common graduated style based on a common attribute column of all layers

QGIS: I have several layers which contain the same attribute with different values (for example attribute X). I want to display a common graduated style based on the common attribute column of all ...
user243380's user avatar
0 votes
2 answers
57 views

QGIS: Make larger symbols appear behind smaller symbols from the same layer

Points from a point dataset (delimited text file) are shown with graduated colors and graduated size. The symbology setting is as in figure A. The points overlap each other according to their listing ...
stonebe's user avatar
  • 467
0 votes
0 answers
42 views

Showing attribute-form with objects of another shapefile in QGIS

QGIS 3.34.6: I have two layers, layer 1 shows different bridges, and layer 2 contains different events at these bridges in different years. Each event is one object in layer 2. I would like to get an ...
Bertram's user avatar
  • 483
2 votes
1 answer
141 views

What is the name given to the table layer in QGIS?

What name is given to this selected layer? It's not a vector layer where you can add geometries, it's something like a table or spreadsheet.
Aloísio Ângelo's user avatar
1 vote
1 answer
62 views

Croping a layer to match another one in QGIS [closed]

I am running an experiment to compare several layer of the same AOI however some layers are larger than the others. In order for my experiment to work, the layers should show the exact same AOI ...
David Smith's user avatar
1 vote
0 answers
33 views

QGIS - getting the graphics from the OSM standard to polygon representing my research area

I´m new to QGIS and are trying to make a copy of a certain area: But I want the graphics and scale to follow along from the original map. Not just retrieve a single color polygon. The polygon is I ...
William Knutsson Gustafsson's user avatar
0 votes
0 answers
27 views

Geoprocessing outputs no longer appearing in selected folder, appear at top of Layers pane

I recently upgraded from QGIS 3.28.10 (Firenze) to 3.34.5 (Prizren). I'm noticing that the results of geoprocessing do not appear in the selected folder or above the selected layer in the Layers pane. ...
Lukas Kucinski's user avatar
1 vote
0 answers
44 views

Join Layers for PyQGIS

I am using version 3.0 and above. Below is my code where i want to join two layers. I didn't get any error but the Charting Layer doesn't show update on fields. I need to join UPI field of Excel file ...
unknown's user avatar
  • 11
0 votes
0 answers
10 views

Python IDLE crashes while trying to remove a Layer from an mxd containing a lot of layers using ListDataFrames

Problem My ArcGIS 10.8.1 crashes whenever I try to open an MXD project that contain Basemap layers. I need a script to remove Basemap layers without opening these MXDs but Python IDLE also crashes ...
Dan G. Ochoa's user avatar
0 votes
0 answers
41 views

Free tile layer without roads or labels

Is there a free tile layer without roads and labels ? I'm trying to create interactive history maps and current city names and roads are irrelevant. I'm looking for a tile layer that only displays ...
Noan Cloarec's user avatar
0 votes
0 answers
19 views

QGIS crash everytime post not saving new layer

I edited one layer but closed project without saving it. Now my project is opening but it crashes within 2 - 3 minutes' of opening. What all I can do to save my work?
Rahul Raj's user avatar
1 vote
0 answers
43 views

How to set new layers as active layers by default in QGIS

Whenever I add a new layer, I want QGIS to set that new layer as the active layer. This is the default behaviour in QGIS for Mac but not in QGIS for Windows. How could this be achieved?
nelson____'s user avatar
0 votes
0 answers
28 views

How to set legend layer invisible in PyQGIS

How I can to set layer (memory layer in my case) invisible in legend, but visible at map? I saw QgsLegendRenderer.setNodeLegendStyle(node, QgsLegendStyle.Hidden) solution, but I can't find a way to ...
Dezmonder's user avatar
0 votes
1 answer
82 views

CSV with Coordinates in QGIS [closed]

I want to upload a CSV in QGIS (add layer "Data source manager", "delimiter text"). Every time when I'm uploading the file it won't show me as a point layer. What am I doing wrong?
Vivien Müller's user avatar
3 votes
0 answers
27 views

Placement of a temp layer

Updated to 3.34.4-Prizren and when creating a temp layer like "Union" or "SinglePart(?)" it used to be placed in the direkt spot over the layer that was active in the layerpanel(?) ...
Åke Eriksson's user avatar
0 votes
1 answer
55 views

Change appearance of highlighted polygons [duplicate]

Updated to 3.34.4-Prizren and when selecting a certain polygon the highlighting has changed to just the points/border going yellow. How do I change back so that the whole polygon turns solid yellow ...
Åke Eriksson's user avatar
3 votes
1 answer
110 views

Having layers on top of hillshade in QGIS

I am currently trying to import some OSM data into QGIS and styling it a bit. For what I want to do, it's necessary to have a hillshade and some contour lines, which i both managed to create following ...
Playfra's user avatar
  • 31
0 votes
1 answer
144 views

How to get the point of highest elevation inside a radius on a raster (PyQGIS)

I need to run some calculations on some raster points, as I'm trying to find the highest point in a given radius around where the mouse is clicked. So far I've managed to get the X and Y coordinates ...
oliver's user avatar
  • 95
0 votes
2 answers
90 views

Updating data sources in .aprx files

I am about to break a lot of data sources in our team's .aprx files because we are overhauling the places we are storing our data. Our data is stored in shapefile and file geodatabase formats. Is ...
Joshua Chan's user avatar
0 votes
0 answers
18 views

How to check the log of TOC layer in ArcMap, like "Results - Current Session"

I use ArcMap version 10.2. I want to check the usage history of the layer in Table Of Contents. (Add layers, delete layers, check layers, etc.) Is there a function or page that allows to check history ...
workman's user avatar
0 votes
0 answers
21 views

Invalid datasource when importing from Google Drive

I am using QGIS 3.2 and attempting to import a layer definition file stored on a company Google drive. Every time I import the file I get an "invalid datasource" error and I am unable to ...
user234346's user avatar
-1 votes
1 answer
59 views

QGIS how to know which ids are used in (All layers)

I've connecting to my provider WMS, but the problem I face is I want to know which layers and in which order they are setup in the (All Lager (All layers)) When I choose it, the layer panel shows one ...
Printer's user avatar
  • 101
3 votes
1 answer
70 views

QGIS Multi-layer selector for real time digitizing

From a project with more than one layer that are in Editing mode, I would need a solution that allows to, in real time, select the layer I want to digitize. The solution I would need would be, for ...
Ingrid Ingravida's user avatar
0 votes
0 answers
25 views

How do I merge shapes in different layers to one big area?

How do I merge shapes in different layers to one big area, I already tried "Vector > Data Management Tools > Merge Vector Layers" but that only puts the attributes of the layers in one ...
hptlucas's user avatar
0 votes
1 answer
25 views

Delimited text layer ACLED data base: I can't see all the points

I downloaded a CSV file from the ACLED database but I am struggling to see all the points on my map. I have over 2000 rows, so I should have 2000 points or so to showcase on my map when the longitude ...
LTNNOOR26's user avatar
0 votes
0 answers
25 views

Error with layer export

I am having problems exporting a layer in QGIS. The error message shows Export to vector file failed: Error: Creation of data source failed (OGR error: sqlite3_open(enedun24_planetaji.gpkg) failed: ...
Martins's user avatar
3 votes
1 answer
107 views

Saving workspaces with dynamic filepaths

We have a large amount of background mapping data saved in a OneDrive folder that is then synced to each user's laptop on their C drive. If one user saves a QGIS workspace on the company's shared &...
davehughes87's user avatar
1 vote
2 answers
189 views

Leaflet custom layers: how to make them to be combined by user?

I have created a Leaftlet map in an Angular project, using an extended version of tileLayer WMS class: export class ExtendedWMS extends TileLayer.WMS { constructor(baseUrl: string, options: ...
smartmouse's user avatar
1 vote
1 answer
307 views

LayerSwitcher in OpenLayers 8.2.0?

I was surprised to read that the latest version of OpenLayers (ie. 8.2.0) does not have a layer switcher control as in the earlier versions. After googling it seems that such a control has been nicely ...
Gery's user avatar
  • 2,135
0 votes
0 answers
34 views

Using a DEM to elevation data to an existing point shapefile

I have a point layer called air_quality_locations which contain points with air quality and ozone readings across California. I also have a 30m DEM for California. How do I take the elevation data ...
Jonathan Sharp's user avatar
3 votes
1 answer
67 views

Disallow layer renaming in a QGIS project

I have a QGIS project with multiple layers and would like to prevent the user from easily renaming the layers in the layer tree. Can I set this in the project's settings and if so, where/how?
bugmenot123's user avatar
  • 10.9k
1 vote
2 answers
151 views

Merging layers, then dissolving and keeping all attribute values in QGIS

I have three layers in QGIS, each with one feature, including some attributes. Layer 1 has attributes a, b, and c, Layer 2 has attributes d, e, and f and Layer 3 has attributes g, h, and i I want to ...
winnewoerp's user avatar
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