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 toppics for a map.

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Adding feature class to active map from geodatabase

An extension of the question answered here: Adding feature class to Map in CURRENT project using ArcPy in ArcGIS Pro? This method adds the feature class to the first map in the project, but what if I ...
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QGIS adds layer to GEOPACKAGE layer but displays "could not find layer"

I have noticed something strange when merging layers (not matching attribute tables) together. When I try this QGIS responses 'Export in vector data failed. Could not find layer.' So far so bad. When ...
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Using ArcPy to add layer to map

I am having trouble adding my result to the current map using ArcPy. I keep getting this error problem, "ValueError." Here is my script: Result = arcpy.analysis.Clip('FeatureClipped','...
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Layer Blending in ArcGIS Pro and Publishing to service

I've been working on a service to publish and have made a very clean map using layer blending. However, when publishing as a Web Map, a web layer WMS and a Map image, it removes the blending of my ...
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3 votes
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Using QGIS expression with overlay_nearest() function to create line connecting point to two nearest points of other layer

I have in QGIS ver 3.22 two point layers named: source_p target_p I want to point automatically with a line from the source_p layer to the two nearest points on the target_p layer. Manually, I was ...
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Different EPSG projections in one map

I have some data from different part of the world (US and Europe) and I have to display them on the map. How can I make one WEB map with a few EPSG?
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Zooming using getLayerExtent property of MapFrame not always zooming using ArcPy with ArcGIS Pro

To see this problem: Start ArcGIS Pro 3.0.0 (or any version you wish to test) Create a new project using the Map template, call it TestProject in C:\temp and tick the checkbox to make a new folder ...
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How to stack layers (slope, curvature, aspect, etc) derived from DEM to form multi-band images in QGIS?

Made a DEM from Landsat imagery and derived the aspect, slope, curvature, TWI, etc layers (generic flood conditioning factors). I now need to incorporate these layers and feed them to a LSTM neural ...
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Using Make Feature Layer from URL with token in ArcPy

I have a Python script tool that makes use of a feature layer hosted on a map server. Originally, I got the layer by making a feature layer using the code below. lyr = arcpy....
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Filter/delete polygons if they are surrounded by other polygons

I've been looking for a method to extract polygons (here in green) witch are surrounded by other polygons (red ) in QGIS. How can I do this?
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Join raster color with point layer

I have a raster of the world considering different climatic zones. Then I have a layer with major cities worldwide. Now I want to join the information of colour into the point layer. The option of ...
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1 answer
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Setting layers from GeoJSON property

I have a .js file with 19000 entries from where I want to create layers from a feature.properties.Issue. I have tried diferent approaches I have found in here but for some reason the layers are not ...
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How we reflect the Z-value in Derived?

I using QGIS Desktop 3.20.0 (free download). How we show the Z-value in Derived? Please refer the screenshot.
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Map automation using ArcPy with ArcGIS Pro

I wrote Python code with the ArcPy library. The main purpose of script is to load a locally stored shapefile, assign it a style, labels, and then use a layout template to automate map generation. What ...
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1 answer
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Filling layer shapes with images based on filenames on QGIS

I have a grid shaped layer. There is a special cadastral map image file for each grid name. The name of the image files is the same as the grid ids. There are thousands of images and layers available. ...
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Show/hide layer by clicking on HTML link in Leaflet?

I have 7 GPX files that I successfully loaded into a Leaflet map. My problem is that I would like to show/hide each of them using some link on the web page. Let say that links have the following code: ...
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Old project now shows up blank (no more layers)

I've been working on this project for months now. Today I opened it up and it was blank, no layers, no nothing. I'm using version 3.16 of QGIS I've tried opening multiple other projects and they all ...
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Merging series of raster layers pairwise in QGIS based on same date

I have a series of satellite images from different time periods. For each date, I have two adjacent images that I want to merge. The layer names contain the datetime information, based on which the ...
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Making Grouped Layers in ModelBuilder using ArcMap

I started using ArcMap 10.4 just a few weeks ago, I've started to get a handle on the ModelBuilder however I can't seem to make the layers I export be automatically grouped. So far this is the most ...
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Import symbology based on stats using ArcMap

When I import dozens of NDVI layers to ArcMap, I have to manually create the classified symbology (Natural Breaks - Jenks) for each of them. If I import that symbology to another layer, it won´t re-...
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4 votes
1 answer
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Spatial queries with QGIS provider feature filter (layer filter)

QGIS offers the option to use layer filters: Layer Properties > Source > Provider Feature Filter, see documentation: Query Builder. As far as I can see, this filter is only able to filter based ...
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Select interaction with openlayers: multi equals true. How to store all layers?

I have a select interaction, with multi option equal to true. This interaction is used with popup, following code https://viglino.github.io/ol-ext/examples/popup/map.popup.feature.html I store the ...
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GIS layers created using FME 2021 not visible in QGIS

QGIS 3.24 SQL Server 2015 I have GIS layers in SQL Server created using ogr2ogr and FME2021 All the layers are created using my machine. In my QGIS Desktop I can see all layers irrespective of how ...
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Calling name of layer in QGIS modeler [duplicate]

I want to know how to call the name of the layer in the QGIS modeler, but I cannot find a way to do this. For exemple my layer input in 'test' is called Lake, I wanted to be able to create an output ...
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Changing properties of existing layers no longer possible in latest QGIS

Latest QGIS 3.26 when a layer is highlighted and then select- Layer, Layer properties, it will only select the last layer to be created and it is impossible to change the appearance of any other layer ...
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3 votes
1 answer
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Transformation of coordinate systems

I have two layers - the first is in 5514 (S-JTSK_Krovak_East_North; sr_0.shp) and the second in 2180 (ETRS_1989_Poland_CS92; pl.shp). I think the coordinate system of both layers is correct. I need to ...
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Combining KMZ files keeps layers separate

Seeing as the My Maps app is no longer supported (from what I've read) I am trying to make an interactive map on Google My Maps just through an internet browser. The problem I'm having is that Google ...
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5 votes
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Making layer names in legend permanent using PyQGIS

While constructing a legend in Print Layout, I modify the names of the layers just in the legend, but not in the Layers panel (works as expected). Reproducible code is at bottom. However, after I ...
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Overlay callout to empty space on map

Is it possible to make a callout on the Overlay / box to place on map it outside the coordinates, so that we use an empty space to place the overlay. This is because if we have several overlay ...
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Leaflet toolTip-display is a function of layer order

My map creates 3 Leaflet GeoJSON layers representing state, county, and town features collections. Each feature (in each layer) is bound to a tooltip by the onEachFeature option. The toolTip displays ...
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QGIS doesn't show datapoints of .csv file

I am not yet familiar with QGIS and I am trying to add an Excel file with GPS points and data (add layer > add delimited text layer). The Excel shows up as a layer, but the points do not show on ...
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Transferring Noticing Script from arcpy.mapping to arcpy.mp

I am trying to reconfigure a script I have been using in ArcMap into ArcGIS Pro and have discovered the whole arcpy.mapping vs arcpy.mp. I am stuck on a section that is trying to list layers. Here is ...
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1 answer
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Finding features in QGIS with partly different attributes

I have several layers and they all have identical table organization. I need to find if there are any features that have a different names but the same UUID. I know that this could be done if I ...
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Layer definition as "not editable" - INPUT app

I am using QGIS 3.18. I have add two layers into my project. I have uploaded it to the INPUT app. How can I define that one of the layers could not be editable in the app.
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2 votes
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Expression to retrieve name of next underlying activated layer

I have a QGIS project with vector layer that contains many atlas features and then I have many different raster files "under" it and depending on what I want to export, I activate them. ...
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3 votes
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75 views

An outside script to load layers in QGIS

I have been piecing code together from a number of posts to python outside of QGIS that will open a QGIS instance and then load specific data I feed it. I am not to familiar with using the QGIS API ...
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1 vote
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ArcGIS Pro Layers - Update Data Sources with Model Builder & ArcPy

So I'm attempting to write a script that updates the data source for the layers in my map. The script is incorporated into a model and gets some of the pathways from the model's outputs. When I run ...
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1 answer
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Extending TileMill map (OSM CartoCSS) with layer and style for man_made=pier (YML/MSS, MML)?

I would like to extend the Stamen Toner map style (https://github.com/stamen/toner-carto/) with a layer to render piers (Way:area,man_made=pier). I managed to install tilemill on Ubuntu (https://...
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2 votes
1 answer
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QgsRasterLayer is invalid when run as standalone PyQGIS

The following code behaves as I expect when I run it in QGIS Python Console, but when I run it as a standalone from the console, the layer is invalid. urlWithParams = 'type=xyz&url=https://tile....
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Raster disappears from ArcGIS Pro after applying symbology

I've downloaded open data for soils from ISRIC: https://data.isric.org/geonetwork/srv/eng/catalog.search#/metadata/41cb0ae9-1604-4807-96e6-0dc8c94c5d22 There is an ArcMap document .mxd which opens ...
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2 votes
1 answer
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QGIS Offset Points by value

I've got one layer with a line (e. g. a road) and one layer with points (e. g. trees along the road). So far, the points are placed right on the line, but the attribute table of the point layer has a ...
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0 votes
0 answers
59 views

Unsupported geometry type 'Unkown type' in Layer - Unable to load project in QGIS

This is a seemingly simple issue but I can't seem to fix it. When I load my project in QGIS, I get an error message that says: "Unsupported geometry type 'Unknown type' in Layer ''. When I click &...
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3 votes
1 answer
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Importing layers from DWG and they aren't appearing on my QGIS map

I am extremely new to QGIS and havent been able to find a solution to this problem I ran into when trying to upload a .dwg file I was given. I imported the file using Project > Import/Export > ...
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1 vote
1 answer
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Aggregating child features with parent attribute values in QGIS

I found this question when looking for my answer Referring to the parent layer with aggregate functions in QGIS I need to do something similar. In another words I need to join attributes by field ...
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1 answer
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One of the multiple layers with different extents not visible in MapServer

I have 2 layers in the map file with different extents. In QGIS, I am able to see them one over the other in proper positions. However, when I am adding those 2 layers in the map file for MapServer (...
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1 vote
1 answer
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How to snap a graphic to a vector basemap layer

I'm using the Sketch Wdget in a map for drawing graphics. Is it possible to snap the drawings (polygons for example) to the roads that are part of the vector tile layer i'm using as a base map?
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5 votes
1 answer
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Deleting the same column(s) from different shapefiles in QGIS

In QGIS, I have a problem deleting the same column out of different shapefiles, is there a way to do this? I want to delete several columns out of all these layers, is there a way to do this without ...
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QGIS 3.22.6 Add letters to check boxes instead of ticks when using value relation widget

I am using QGIS 3.22.6. I have added a species list to a polygon layer using the value relation widget. For each feature I am able to tick/select which species are present within the polygon. Rather ...
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0 votes
1 answer
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Split Polygon in one layer based on boundaries in second layer

I have two different polygon layers, 1 and 2. Now i want to split polygons in layer 1 taking reference from polygons in layer 2. Is it possible in qgis???? Please find attached image as reference ...
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Saving layers from ArcSDE to layer file using ArcMap

I have an MXD with layers sourced to SDE feature classes. I am trying to save the layers as layer files. However, I can't get arcpy.SaveToLayerFile_management to do its job. Here's the code I use in ...
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