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Questions tagged [overlapping-features]

Features that share some or all of their spatial location with other features.

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QGIS Overlap analysis and R terra::intersect do not give the same results

I have performed an Overlap analysis between a Vector layer of classified values (Slope) and a series of smaller vector layers generated from KDE analysis. The aim was to produce a table with the ...
Amantil's user avatar
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0 answers
40 views

Calculating of point stationing along axis in QGIS

I have this issue in QGIS: I need to calculate the stationing of start- and endpoints from line features (cable management system) alongside an axis (railway). The stationing should run along the axis ...
Martin's user avatar
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3 votes
2 answers
165 views

Changing values where two geometries are equal otherwise keep value with QGIS Virtual layer

I have two line layers in QGIS, of which one layer (layer 2 - yellow in the image) is a geometrical subset of the other (layer 1- blue in the image). The two layers also differ in their values of a ...
i.i.k.'s user avatar
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2 votes
1 answer
53 views

Python: Split Polygons where they overlap one another [closed]

I have a python script that produces a shapefile of polygons, created primarily using geopandas. I wish to split polygons where they overlap each other. Ideally removing all but one feature where ...
BlindedByBeamos's user avatar
1 vote
1 answer
56 views

Summing equal geometries with identical columns in QGIS

I have two vector layers with line geometries which share column names. The one is a subset of the other, and even though they share the same columns, they differ in their values. I would now like to ...
i.i.k.'s user avatar
  • 1,753
2 votes
2 answers
55 views

Finding overlapping line geometries (including subsets) in QGIS

I have a vector file with ~4000 line geometries. Some of the lines are overlapping, or more precise, it seems, that some lines are subsets of the longer geometry. How can I find all overlapping lines ...
i.i.k.'s user avatar
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1 vote
1 answer
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How to match the Target Feature with the largest overlap in the Join Feature layer? The opposite of 'largest overlap'

kind of solved: it appears I need QGIS for this task. Joining attributes by the biggest overlapping areas in QGIS • Largest overlap—The feature in the join features will be matched with the target ...
ThomasHaarlem's user avatar
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50 views

Overlapping 2 raster data

I have a raster file which a vegetation indices file where a certain indices value say: 0.2-0.4 is represented in Green Color and rest in white as shown: I now want to overlap slope for my study area ...
Walker's user avatar
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1 vote
2 answers
63 views

Displaying two elements in the same coordinate in QGIS [duplicate]

In QGIS I have two elements in the same coordinate and I believe the software is recognizing them as only one point. Is there a way for me to visually display in the map the presence of more than one ...
artretr0's user avatar
3 votes
1 answer
49 views

Merging attributes from line layer and polygon layer in QGIS

I am using QGIS 3.32 and have a grid layer with hexagons (so polygons) and a line layer. I would like the hexagons, which are overlapping the line layer to "take on" the attributes of the ...
jtheb's user avatar
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How to clip a hole with ogr2ogr? [duplicate]

ogr2ogr has a rich set of clip options, e.g., -clipsrc [<xmin> <ymin> <xmax> <ymax>]| WKT|<datasource>|spat_extent But how can I clip the same sized hole instead?
Dan Jacobson's user avatar
3 votes
2 answers
225 views

Getting GeoSeries with all the points and their coordinates from GeoSeries that has multiple types of geometries in GeoPandas

I'm writing a program that reads two MultiLineString shapefiles and intersects them, then processes the result in various ways. The intersection normally will give me a GeoSeries of points, like this: ...
cfnnm's user avatar
  • 33
3 votes
1 answer
134 views

QGIS - find overlapping areas between polygons and retrieve id per polygon

I'm having trouble understanding how to find overlapping areas between two polygons (using QGIS, but I'm open to coding if it's any easier), and obtain not only the output polygon, but also which ...
mto23's user avatar
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1 vote
0 answers
29 views

QGIS - SQLite trigger to create buffer but with a non-overlaping clause

I'm using an SQLite trigger to add a buffer around another "POINT" layer based on entered values. The buffers are being correctly added, but I'm encountering difficulty in preventing them ...
Giene's user avatar
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49 views

Separate overlapping features

I have an issue with a specific QGIS Layer. The layer represents blocks in a city. It's made of polygons, each one representing a street, a square, a building a park and so on. When selecting the ...
Frannzz's user avatar
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2 votes
1 answer
38 views

Transfering attribute from line layer to polygon layer by their overlay in QGIS

I have a polygon layer that represents sub-catchments and a line layer that represents a stream network. There is exactly one feature in the line layer for each polygon. I have used v.rast.stats to ...
Fabi's user avatar
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0 answers
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Bulk-removing self-overlapping polygons

Using QGIS 3.18, I ran the topology checker on a polygon layer (gpkg format). It found several thousands self-intersections. I can see the errors, but I cannot seem to be able to delete the polygons ? ...
rdelattr's user avatar
2 votes
1 answer
63 views

Sort overlay intersections by area of overlap

I am able to get list of attributes of overlapping geometries in QGIS . I want to sort by descending area of overlaps in the geometric . Original Expression array_to_string(overlay_intersects( layer:='...
Alexander B's user avatar
0 votes
1 answer
21 views

GEE feature alignment in two featureCollections (same features but with different ID properties) [closed]

I have two sapefiles consisting of features + geometries that represent the same bounding areas on earth. Lets call them shp_D1 and shp_D2. Like in many shapefiles, every feature (polygon) in these ...
Sina NAKHOSTIN's user avatar
3 votes
2 answers
289 views

Removing overlapping features in one layer in QGIS

I have a dataset in QGIS with polygon features that partially overlap completely. I would like to delete the overlapping polygon features so that each area is only covered by one feature. The decision ...
Fabi's user avatar
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3 votes
1 answer
88 views

Mark overlapping areas in QGIS

I have one layer in QGIS with many polygons (drawn in different colors) that partially overlap. How can I mark the areas that overlap separately (e.g. dashed)? Here is an example: The colors of the ...
leberkas-lover55's user avatar
2 votes
1 answer
50 views

Fix "folded" polylines using FME

I have a dataset with polylines. For some reason the polylines are drawn back and forth multiple times. You can regard the lines as folded. The number of lines the runs back and forth varies from line ...
Meatball's user avatar
  • 121
3 votes
3 answers
348 views

Getting only the intersection part of self-intersecting polygons in QGIS

I am trying to find places where different features in one layer intersect. An example picture of the layer: The result I would want from it: However, at best, using Intersection, Clip or SAGA Self-...
guul66's user avatar
  • 31
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18 views

Topology checker won't highlight in red the overlaps

I´m using QGIS and trying to find overlaps in a shapefile. When I use the Topology Checker I get 24 results for overlaps, but they are not highlighted in red as they used to the last times I did the ...
Gonçalo Coimbra's user avatar
0 votes
1 answer
60 views

Display symbols only when labels are displayed

On the map I have symbols (points) and labels for all municipalities with more than 10.000 inhabitants. Due to the fact that some parts of the desired area don't have municipalities with more than 10....
Filip's user avatar
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0 answers
57 views

Getting overlap of polygon features on point layer using ArcGIS Pro

I have two layers. The first is a point layer with centroid coordinates and the second is overlapping drive time isochrones created by Network Analyst - Service Area. The two images are shown at the ...
Daniel Sim's user avatar
7 votes
2 answers
187 views

QGIS functions: aggregate and array_foreach not working for vertices

I have two layers as the whole project in EPSG:4326: polygon layer of countries linestring layer of routes I want to concatenate the country names (those are stored in "name" attribute) ...
Kluuboo's user avatar
  • 71
1 vote
1 answer
64 views

Overlap Analysis (Line Data Overlapping Polygons)?

I am attempting to calculate the length (or percentage) of a line layer that overlaps a series of polygons. As an example; lets say I was trying to calculate the distance I drove across a series of ...
Pclark94's user avatar
0 votes
0 answers
27 views

How to change polygons order of appearance in QGIS and keep it when exporting in GeoJSON [duplicate]

I am trying to change the overlapping order of certain polygons in my layer in QGIS. I applied the function found in Properties>Symbology>Layer rendering and set the order of appearance by two ...
Elena Politi's user avatar
2 votes
1 answer
87 views

How to properly perform zonal statistics with overlapping geometries

I am using python 3.9. I have a shapefile with overlapping polygons and a raster dataset. I would like to summarize some statistics on my polygons. However, as I mentioned, my polygons are overlapping....
OgeiD's user avatar
  • 618
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0 answers
11 views

Group Template that clips/deletes enclosed polylines to avoid overlaps

I have a group template that creates a polygon with one feature template and a boundary made of of 2 point line features with another feature template. For the polygon, the template had an option to ...
theyhem's user avatar
5 votes
1 answer
209 views

Display only one label for overlapping points in QGIS

I have a point layer with some overlapping points but I want to display only one label per symbol. For line and polygon symbology there is the "Merged features" option to agglomerate ...
dmjf08's user avatar
  • 1,293
3 votes
1 answer
107 views

Generate dynamic sum of attribute values from one layer based on overlap with polygons on another layer

I'm using QGIS 3.28 on Windows. I'm trying to make a workflow for determining whether a proposed lot satisfies minimum lot sizing based on soil type composition. I have: a single-polygon overall ...
dsjeffery's user avatar
1 vote
1 answer
59 views

Select by location fails for some lines in QGIS

I have many line objects in a layer called "line" (pink). Further, I have line objects in a layer called "Connection" (blue). The lines in "Connection" are created by the ...
Dennis's user avatar
  • 43
2 votes
1 answer
141 views

Calculating percentage of landuse type within buffer using Python [closed]

I have two polygon shapefiles: buffers and landuse types. I want to calculate the percentage of each landuse type within the respective buffer. The problem is that the landuse type polygons are bigger ...
Lina's user avatar
  • 233
1 vote
0 answers
106 views

Finding the name and area of layer under buffers

I am new to QGIS and am using version 3.34.2 (Prizren). I am using two files to accomplish a couple of tasks (explained below). The first file shows the outline of groups of villages (gram panchayat [...
Ramandeep's user avatar
1 vote
0 answers
33 views

Point-to-line-error when joining attributes by location in QGIS

In QGIS I have several lines with an azimuth attribute. I want to write this attribute to a point layer with "Join attributes by location". The points lay right on the lines (I used the &...
Max's user avatar
  • 11
0 votes
0 answers
20 views

r.mapcalc in GRASS GIS fails to mask rasters

I have a raster binary map (0-1) where 0 represents unsuitable areas (violet) and 1 represents suitable areas (yellow). I want to crop another raster (red) based on this suitability (for several ...
LT17's user avatar
  • 303
1 vote
1 answer
73 views

Summing up attributes overlapping polygons in QGIS

I have large single layers with many features overlapping, like this: Where the features overlap I want the attributes added together. I've managed to count the number of overlap polygons by doing ...
Alba's user avatar
  • 11
2 votes
0 answers
70 views

Selecting features based on minimum overlap with another layer in QGIS [closed]

I have a "sites" vector layer with 300 polygon features and a "heathland" vector polygon layer, showing the locations of heathland areas. I am looking for a way to select all ...
nn90's user avatar
  • 57
1 vote
0 answers
63 views

Separating intersecting lines in QGIS

I have a project in QGIS where multiple cables follow different paths using specific points as vertices, and sometimes the cables end up crossing over each other. I would like to perform a ...
João Monego's user avatar
2 votes
2 answers
65 views

Splitting polygon that is result of difference function between two polygons in QGIS

So I have this polygon (picture 1) that will be used to make its bounding geometry as shown in the second picture. After making this bounding geometry, I wanted to make the difference polygon from ...
Yosua's user avatar
  • 21
0 votes
1 answer
62 views

Select intersecting polygon in QGIS

We're trying to select an entire polygon if any part of it intersects a buffer in QGIS. How can I do this? I can get the intersecting part but can't figure out how to get the entire polygon. To be ...
Evan's user avatar
  • 1
2 votes
2 answers
335 views

Removing polygons from GeoDataFrame which do not intersect with any polygons of other GeoDataFrame using Python

I am looking for an efficient way to remove any polygons from a GeoDataFrame which do not intersect with any polygons of another GeoDataFrame. I tried it the following way which seems really ...
wup017's user avatar
  • 23
1 vote
1 answer
93 views

Creating raster layer with pixel values which are sum of overlapping polygons in single vector layer

I am using QGIS. I have a vector layer with about 600,000 overlapping polygons, each with an assigned risk value as attribute. I want to create a raster layer which shows the total risk value at each ...
I'm not a robot's user avatar
1 vote
1 answer
89 views

QGIS Rasterize tree polygons - giving priority to higher trees

I used points of trees and created buffers around them based on their canopy widths. I rasterized these polygons and burned tree height as a value (later to be used for shadow modeling). Important is ...
Mat_114's user avatar
  • 23
6 votes
5 answers
2k views

Finding overlapping polygons within the same layer in QGIS

I have a polygon layer and want to check if there are some polygons overlapping within the same layer. How can I do this? In ArcGIS, I could run the Intersect tool only by adding the layer I want to ...
Motti's user avatar
  • 466
0 votes
0 answers
46 views

How to cede overlapping area in polygons in QGIS to one of the polygons based on a condition

I have a shapefile with 2745 individual sites/polygons in the Philippines, each site represents a tree planting project, with relevant information (30 attributes to be precise), including the year the ...
badiskhiari's user avatar
2 votes
1 answer
155 views

Intersection of two GeoDataFrames using Python [closed]

I have two GeoDataFrames: The first one is a large grid (many small bounding boxes), each row is a bounding box saved as a polygon. The second one contains just a few polygons (one polygon per row). ...
Daniel AG's user avatar
0 votes
1 answer
41 views

How to avoid overlap when working with the habitats baseline map layer on QGIS?

I have recently been working with Natural England's Net Gain Habitat mapping QGIS software. I have plotted baseline habitats, filling out the proposed habitat too. In my previous experience of QGIS I ...
Taylor's user avatar
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