Questions tagged [filtering]
The filtering tag has no usage guidance.
12
questions
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Filtering intersections to exclude artificial boundaries in Shapely
I'm working on a project where I need to find intersections between contours using the Shapely library. However, I'm running into an issue where some of the intersection points are incorrectly ...
0
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0
answers
46
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Filter two columns based on if they are within 100m2 of each other
I need to filter these two columns based on if they are within 100m2 of each other. I'm not familiar with query builder, so I tried some stuff but most didn't work. I would assume that the solution is ...
2
votes
0
answers
95
views
DSM to DTM limited by polygon
I am currently struggling with a specific DSM to DTM conversion requirement over a raster dataset in QGIS. DSM was born from photogrammetry and I need to automatically get rid of houses and vegetation....
- 121
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1
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123
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QGIS value relation dropdown filter by overlay_nearest
I have in QGIS 3.28.8 two point layers: source_p and target_p
I want in source_p layer to create a dropdown to "TargetFID" field with Value Relation to target_p layer with only 3 nearest ...
- 474
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60
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QGIS - Is it possible to select only features of one particular colour from a georeferenced image?
QGIS 30.0 Windows 10 Pro
I have a project to which I want to add a layer. The source for the new layer is a Tif image on which areas of infestation of a plant disease are shown in an orange colour. I ...
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7
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4
answers
1k
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Filtering date field on year using QGIS
In QGIS I'm trying to filter a specific year out of my field dates (type = QDate). It should not be so hard, still I'm unable to make it work.
I've tried for instance:
year("surveys_date") =...
- 73
2
votes
1
answer
177
views
QGIS dynamic filtering parent and child features
I have in QGIS 3.22 point layer, I'm trying to visualize the table:
fid
point_name
parent_relation_to_fid
1
point-X
1
2
point-Y
1
3
point-X
2
4
point-Z
3
5
point-Y
3
6
point-X
2
7
point-Z
4
I ...
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59
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Matching lower level shapefiles with higher level shapefiles
I was trying to combine two shapefiles with different levels of administrative units. when I run it, it is showing error like this.
Feature (344) from “Sector_Boundary_2006” has invalid geometry. ...
4
votes
1
answer
319
views
Filtering Data to Categorize Points in QGIS
I have a geojson file with all my data, in QGIS I only want to display some points and have tried to filter them through symbology for the layer doing so by making them categorized points and using an ...
2
votes
1
answer
274
views
Is GPS data already filtered?
I was driving around in my car, with a GPS module on the roof. The data I collected is somewhat suspicious. The module I used is a standalone GPS module (L80-M39) integrated into a PiHat LORA-module. ...
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0
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77
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Masking non-vegetation areas in image
I'm having a little trouble masking non-vegetation areas in my images.
I'm using Sentinel-2 images, and I have land use and cover across my country (Brazil). To this end, I reclassified this land use ...
- 11
0
votes
1
answer
234
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Lizmap content filtering for different users and other
I am absolute begginer with Lizmap.
It would be great if I could get some explanation so i am able to continue with Lizmap and my Qgis data web publishment project.
Can i setup content filtering in ...
- 651