Questions tagged [overlapping-features]
Features that share some or all of their spatial location with other features.
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How to remove areas of overlap within the same layer in QGIS
I'm currently working with some data on soil survey areas in the US, and have run into a small issue when intersecting this data with another set of parcel areas.
The problem appears to be that there ...
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Efficient way to compare fields or expressions of intersecting features: bulk-loading vs. get features one-by-one
I want to find an efficient (especially in terms of memoryusage and processing speed) method to compare intersecting features by attribute/expression.
For this script I am iterating over a ...
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Getting part of polygon that is closer to point A than point B in QGIS
In QGIS I have a points layer and a polygon layer. Two of the points in the points layer lie within a polygon in the polygon layer. I'd like to generate a new polygon that includes all the parts of ...
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QGIS intersect or summary function not working precise enough?
For my thesis I am trying to convert some data using QGIS.
I have: A vector layer with all the parcels of a municipality as polygons and a layer with all the
buildings in said municipality as 2D ...
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3
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Counting points that meet condition within polygons in QGIS
I want to create a dataset containing information about civilian deaths in areas near UNPKOs. Therefore, I use the Geo-PKO dataset, which geocodes UN peacekeeping missions, and the UCDP-ged dataset, ...
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Getting coordinates from random points in polygon and sync it with shapefile in QGIS
In QGIS I have a shapefile that contains a polygon of administrative boundaries in a country. I need to add six random points inside the polygon.
Can i get the coordinates from random points feature ...
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2
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"overlay_*" functions not working in PyQGIS with getFeatures() expression
I am trying to use overlay_intersects() inside an expression in order to loop through the features from a target layer that intersect with a feature having a certain "id".
request_string = &...
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Clipping features in a polygon from another feature in the same layer
I have a polygon layer with a number of features which overlap (in my case this wildfires in an area over time). I would like to clip the underlying features so there is no overlap. To elaborate I ...
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Adding/concatenating multiple values in column when using line intersections in QGIS
I want to use the "Line Intersection" function in QGIS to create points wherever lines cross. The lines are roads and I need the road names in my points layer.
Does anyone have an idea how I ...
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Clipping road network that within polygon using QGIS
There are two layers in the QGIS project:
the first contains the road network for a geographical area. CRS: OGC:CRS84
the second contains polygons that collectively cover the geographical area. CRS: ...
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Counting all points in polygon where the name of polygon and point matches with SQL
In QGIS I have two datasets: (1) one with points that have two fields, the unique identifier "PK" and "species" - either H, L or G (2) second with polygons of areas, again with ...
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Expression for extracting specific parts/geometries from dataset in QGIS
Solution below worked for a small subset with a filesize <<1 gb, for larger file sizes another solution would be needed
I'm trying to formulate an expression which extracts specific parts/...
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Selecting the maximum value from series of polygons that intersect with line in QGIS
Is there a way to select the cell (single) with the maximum value in a polygon layer using the intersection of a line? The first image is the grid (polygon) layer with the attribute field "VALUE&...
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Creating new polygons from intersecting polygon and polylines in QGIS
I want to create new polygons from the intersecting polygon and polylines shown in the images below. At the output, I need to get four polygons representing the polygons shown in the top image after ...
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'union' between spatial polygons and spatial points in R
I have a gridded map shapefile with grid identifier cells (gid).
dput(head(grid))
structure(list(gid = c("183253", "183254", "183255", "183256",
"183258&...
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QGIS - how to split features based on overlap
Splitting by overlap
I need to find a way to split features based on overlap within the same layer. If, for example, I have two circles that overlap partially, I would have an output of three features ...
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Making line thickness based on the sum of overlapping lines in QGIS [duplicate]
In QGIS 3.22.2 I have used the ORS distribution calculation tool to work out the number of vehicles that go from one origin to multiple destinations. I am trying to represent this number as a line ...
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2
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Calculating mean value for points within polygon in QGIS
I have square polygons that follow the route of a boat. There is also a point layer with different measurements like salinity, temperature etc. Sometimes there is only 1 point inside the polygon, but ...
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Join attribute based on overlapping area and attribute value
I want to Join a score attribute from a world boundary(Boundary 2) to another world boundary(Boundary 1) based on the spatial relationship between the two.
Unfortunately they are mostly quite ...
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Drawing lines that overlap inside the perimeter using QGIS
I want to make a map, with two plots. I want to draw them only with a line along the perimeter of each one, with different colour. My problem is that when the lines overlap, only one colour is showed.
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How to find which raster cells are overlapped by polygons
(QGIS 3.22)
I'm trying to compare a raster layer with a vector layer and find all the raster cells overlapped by a vector. Unfortunately, the polygons are much smaller than the pixels of the raster, ...
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79
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Appropriating ID for all lines inside polygon in QGIS
I have 12 Polygons with a lot of lines in every Polygon. The Polygon have each its own "ID". I would like to add the "ID" of the polygon to the lines it is containing.
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Point feature class to multiple polygons
In my job, I am currently getting excel files with multiple polygon features in point format. Converting this to points, and then to a line feature class works absolutely fine when using the ID as the ...
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Creating land area polygon from shoreline within chart border in QGIS
I'm trying to create land area polygon from a shoreline within a chart border in QGIS, and there are some lakes that needs to be clipped from the land area. I've tried the "Lines to Polygon",...
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How to create single polygons from overlapping polygons and sum attributes [duplicate]
I would like to achieve the following:
All the polygons are located on a single layer.
I already tried to use SAGA self intersection with the "power" as an identifier, but I get wrong ...
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164
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Removing partly overlapping lines within the same feature
I have several layers which have features with several parts. These parts are often overlapping however and as a result the Length of the feature is often not correct when I calculate it using $length....
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3
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148
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Selecting all electoral division within local electoral area in QGIS
I have two vector layers:
electoral divisions (blue)(similar to counties)
local electoral areas (green outline) (similar to states).
I'd like to select all EDs 'within' a state using 'Select by ...
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46
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Determine average noise in a shapefile using QGIS
I am completely new to QGIS.
I am currently undertaking an analysis on urban green spaces (UGSs) in the city of Luxembourg.
I have noise data (expressed in Lden (dB)) on car, rail and air traffic ...
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32
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Dissolving features based on another layer in QGIS
I have two layers, see image below:
Yellow: the ground where people can build;
Red: existing buildings.
Create a shapefile of all grounds where >50% of the grounds are free.
In order to do this, ...
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Checking for overlapping polygons in QGIS [closed]
Since updating QGIS from version 3.20.2 to 3.24.0 I no longer have the same Vector > Geometry Tools > Check Validity options.
This used to allow me to specify how much (area) polygon slivers ...
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47
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Move overlapping labels automaticly
I want to display and label a point layer with 1000 objects. But many points are on top of each other and the labels overlap. Is there any way that the overlapping labels are automatically moved ...
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106
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Visualizing effectively transport transit lines in QGIS
I have a shapefile that contain bus lines. You can see a screenshot below:
I would like to visualize the lines in a more understandable way since there are a lot of overlapping sections.
I have tried ...
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Dividing line using polygons from another layer, selecting specific line parts and join attribute
I am having two layers in QGIS;
A single line layer indicating a route path (Route layer :red line in the attached pic)
A buffer layer derived from a road network line layer (Buffer layer: orange ...
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3
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2
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157
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Removing overlapping polygons without merging any polygons in QGIS [closed]
My layer contains overlapping polygons, as seen with some transparency.
What could I do to remove the overlapping parts (in dark on the screenshot) without merging any polygon in order to obtain the ...
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79
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Creating duplicate points as many times as it overlap with polygons in QGIS
Let's assume there two layers, see image below
a point layer 'random_points_test' with 10 features
a polygon layer 'test' with three features
I am trying to modify the number of features in the ...
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61
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Merging multiple intersecting/overlapping polygons in QGIS [duplicate]
Is there a way in QGIS to select multiple polygons and merge only the ones that intersect/overlap with each other? As in the example bellow only those appointed would merge, becoming each a single ...
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Counting number of distinct areas in cell using QGIS
On the figure below, I have:
a shapefile of cells of 0.5x0.5 degrees around the African continent
a shapefile of different regions in Africa
I would like to count the number of separate regions ...
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30
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Problem with overlapping buffers and tabulate area tool
I use the tabulate area tool. Unfortunately, this tool does not work properly with overlapping buffers (which are the majority in my shapefile), meaning that most of the buffers have a smaller area ...
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Spreading out/pulling apart overlapping polygons in QGIS [closed]
There has been a lot of questions and answers on clipping/removing overlapping polygons in QGIS. However, my question is a bit different. Say, I have a mess of many polygons overlapping one another on ...
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33
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Overlapping of 2 rasters to find common places of overlap of same values
Using QGIS, I am trying to overlap two rasters which are identically shape and extent, but with different values. Values of my data ranges from 0-1.
I want to find the places where mine data values ...
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1
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67
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Listing name of overlapping polygon in QGIS
In QGIS, I would like to assign polygons in one layer (ZIP codes) to polygons in another layer (counties). Specifically, I would like to know, for each ZIP code, in which county it is located. In case ...
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Placing point with specific attribute on top within overlapping points in QGIS
I have a layer with multiple points which have overlapping geometry. Each point is a control at a specific position with each individual attributes. They all have attribute "X" in common ...
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Removing overlapping polygons common to multiple layers in QGIS [duplicate]
I have 2 different layers of tax parcels, but there is an overlapping parcel common to both which I would like to eliminate. See the screenshot below of this overlapping parcel:
This is a simple ...
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Comparing polygons in two layers based on their location in QGIS
I'm trying to compare two layers representing the cycleways of my hometown. I've exported one layer from OpenStreetMap and the other from a regional web site.
Now I want to compare the two layer and ...
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2
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Remove the overlap line left by PostGIS ST_Difference
I need to remove any overlapping from these two polygons
when I run
select geometry(ST_Difference(poliA::geometry, poliB::geometry))
apparently returns A-B but, if I use ST_Intersection to look ...
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1
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268
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Find grid cells which overlaps polygons using GeoPandas
I have two shapefiles:
First one is polygons;
Second is grid file which divides the territory in equal squares. Each grid cell has its corresponding number.
I need to get the shapefile of grid cells ...
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1
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66
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Showing density of vector layer with polygons inside boundaries of another in QGIS
In QGIS I've got one layer showing local authority boundaries across the country (UK), and another which shows polygons of particular sites across the whole country.
Can I show the density of the ...
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Intersecting buffer with county polygon to find county population that lies outside buffer using ArcGIS Pro
I am using ArcGIS Pro.
I have previously created single ring buffers around points, and intersected theses with census tracts and summarized in order to calculate the population within the buffer. I ...
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150
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Creating zones from lines inside boundary in QGIS
I would like to create zones inside a boundary from lines. Hard to explain but you can see my goal in the screenshots below:
Each line should have its own zone. Delimited by the zone of the ...
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Clip tool does not update polygon areas in output in ArcGIS
In ArcGIS I created a buffer of 500m around a point. Then, I clipped a land use layer using the 500m buffer as the clip feature. The outcome is shown in the figure.
My problem is that the layer ...
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