Questions tagged [vector-layer]
A vector layer represents geographic data whose features are given by sequences of points. (Contrast with a raster, which is a grid of values.)
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Exporting labels of vector GPKG to DXF on QGIS 3.34 GUI Windows 10
Objective: Generate a DXF grid of depth labels of a water body in AUTOCAD, a sample is shown here.
Input: I have a raster from which I have performed "raster pixel to points" to create a ...
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Drawing rectangle of road line with width as minimum distance between two buildings in QGIS
I have two layers:
line vector layer representing the road
polygon vector layer representing the buildings
How can I derive a rectangle shape (refer to green rectangle) for each road line whereby ...
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Reducing decimal places of coordinates in vector data using QGIS
I have polygon vector data, some of the polygons are imported from another 3D program (Agisoft Metashape). The imported polygons have up to 12 decimal places in the displayed coordinates (attribute ...
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How to keep attributes after a clipping operation in PyQGIS?
I'm trying to do a spatial clipping operation between 2 point layers, representing buildings and earthquakes, and a buffer area created by the user. The problem is that after operation, all attributes ...
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Vector layer still misaligned after reprojecting
I'm new to QGIS, and trying to figure out why my vector layers are still misaligned after reprojecting.
I am using ESRI topographic basemap EPSG:3857 WGS 84
Two datasets I have overlayed display ...
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Shifting / moving entire layer in QGIS
I'm trying to work on two sets of data :
Public roads (official source, purple on the image)
Network data (private source, brown on the image)
Both layers should overlap (at least, the network data ...
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Decrypt s63 IHO
I'm developing an OEM System for s63 charts.
I didn't find lot of information about the s63 decryption, however I read the IHO Data Protection Scheme, but I don't understand everything.
With Python, I ...
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QGIS - add OS NGD Tiles - API as a vector layer
I have been making good use of QGIS and found the help files able to get me through most problems, although now I am completely stuck at trying to get the "OS NGD API - Tiles" vector tiles ...
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Measurement display while creating a vector layer
I am trying to display the measurement tool on QGIS while I am adding a vector to a vector layer I created. I am using EPSG 4326 and I cannot figure out how to use the measurement tool while creating ...
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QGIS doesn't render QgsCategorizedSymbolRenderer
I'm trying to use QgsCategorizedSymbolRenderer to control the appearance of symbols in a vector layer. To create a simple layer (with circles of different colors), I'm using the following snippet:
vl =...
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Cloud-optimized vector format
Currently, cloud-optimized GeoTIFFs (COGs) are a great format for storing rasters on the cloud, with the ability to read only the portions that you need (stream) at a given time from a client.
Cloud ...
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Classify vector layer by area quantiles in QGIS
I have a vector layer with aroud 400 features, each having an assigned value (here displayed as a label).
I want to classify it into 5 groups (10%/20%/40%/20%/10% of the total area) based on the ...
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Extract a vector from a raster with a single boundary in QGIS
I have a "problem", I need transform a raster in a vector and it works but some pixels like the one in the print it is separated from the boundary, and for my use (a specific use of ...
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Event listener of removefeature does not get executed when a feature is removed from the vectorsource
As shown in the below posted code, I want to execute some side effects in evtListener when a feature is removed from the vector source.
At run time, when deleteSelectedGeometry function is invoked, ...
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QgsVectorLayer not loading correctly
I'm working with PyQGIS and have encountered an issue. While my code successfully creates a new layer (as evident in the screenshot attached), this layer does not load correctly into the project. I'm ...
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