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Questions tagged [filtering]

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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 ...
Bill C's user avatar
  • 937
7 votes
4 answers

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") =...
Jessica's user avatar
  • 73
2 votes
0 answers

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 ...
Rii Pii's user avatar
  • 383
0 votes
0 answers

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. ...
Muneer Kalliyil's user avatar
4 votes
1 answer

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 ...
fuckdatepalms's user avatar
2 votes
1 answer

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. ...
Mike S's user avatar
  • 21
1 vote
0 answers

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 ...
franciel's user avatar
0 votes
1 answer

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 ...
Marin Mirošević's user avatar