Questions tagged [overlapping-features]
Features that share some or all of their spatial location with other features.
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Merge overlapping linestrings and retain attribute table values on overlapping segments
I have a linestring layer. The lines are overlapping at some segments. The lines are perfectly overlapping, they don't swerve to the left/right.
I want to get the segments (500 m long, for example) ...
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How to self union multipolygon layer a GeoDataFrame?
I need to perform a union operation inside a single layer. In Qgis there is an option not to select the second layer, but I can't figure out how to do it in geopandas?
Example:
Plots are red, zones ...
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Identifying features that are surrounded by a certain dimension of another polygon in ArcGIS Pro
I am currently working on a project where I have two polygons files overlapping each over - Polygon A (blue) overlaps Polygon B (green). I would like to be able to identify the individual "blue&...
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Dissolve multiple overlapping polygons into one polygon covering the extent for all such instances of overlapping polygons and not merge into 1 featur [closed]
I have a polygon layer in which some polygons are close to one another whereas some polygons are just alone and do not have other polygons in vicinity. So I created a 10 meter buffer, I want to keep ...
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Filtering lines with some conditions in QGIS [closed]
I have two shape layers: a Polygon layer and a Line layer in QGIS.
I want to filter/highlight lines based on the following conditions:
Case 1: Filter/highlight lines which cross all the polygons (...
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30
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Align edges of polygon to another polygon but only within a distance
I'm trying to align the edges of one polygon with another but only for a section of the polygon in ArcGIS Pro. Basically, I want to align the boundaries of the two polygons but only if they are close ...
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Overlapping labels in QGIS
I'm having an issue with QGIS labels. I have pieces of land that have two owners. The labels on the piece of land are jumping between the two, so it either shows 'A' or 'B' depending on how zoomed in ...
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Checking overlapping points from different layers in QGIS
I have a map with many layers, each one of them showing multiple points for different cities. For some locations, having the same lat and long data, these points are overlapping, being on top of each ...
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Create a polygon of the inner most area of three polygons using ArcGIS Pro 3.0.2
I have three polygons and I would like to create an extra polygon that represents the inner most boundary of all three without tracing manually so a GP tool or GP tool steps is/are required. The image ...
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Combining geometry Overlay Expressions in QGIS Field Calculator
I have 2 shapefiles that cover a similar region, a river catchment and a hex-grid of surface water bodies within the catchment. The catchment has subcatchments, and I'm trying to link the hex-grids ...
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Selecting geographically identical (underlying) line segments and offset them in QGIS
My project has three lines representing three routes along town streets. All three routes lie on the same street for part of their lengths; two of them lie on the same street for another part of their ...
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Grouping all polygons that are highly overlapped with each other in one shapefile using ArcMap
I have one shapefile layer containing thousands of polygons, each represents either a historic or current reclamation project (*Note: Overlapped does not equal to repetitive). I now intend to identify ...
2
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answer
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Add overlay to line geometries in symbology
In QGIS 3.22, I have a MultiLineStringZ layer with crossing geometries and I would like to represent either the Z component with overlay, or be able to order the geometries so that the last ones are ...
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QGIS: Calculating the area of category overlay between 2 shapefiles
I have 2 shapefiles (A & B). The polygons in layer "B" are categorized into 8 categories (1-8) and I want to add 8 columns in layer "A" with the areal distribution of the ...
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Dividing city into blocks (polygons) in QGIS
I'm interested in dividing a city up into distinct blocks, with the end result being polygons for the blocks. I have a polygon for the city boundary and centerlines for the city streets.
Here's a ...
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Merge multiple Isochrones
I have 2 Isochrone maps generated by OpenRouteService (using the R package). Each segment represents a walk of 60 seconds, 300 seconds in total.
Since both starting points are quite near, the ...
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Show more than 6 labels for the same point using QGIS
I am trying to show more than 6 point labels that are all at the exact same coordinates.
Using the feature "Show all labels for this feature" make them stack in one spot, which is not ...
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answer
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Displaying labels with a recursive filter in QGIS
I display the labels of a point layer (layer "q").
With a command found on the site, I know how to filter the labels if they intersect an object from another layer (layer "p1").
On ...
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69
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Making points appear on top of lines in QGIS
Lines are showing on top of points when I want them to show behind. Please see picture for reference.
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Select buffers that do not overlap
I have a dataset with amenities. I've created a buffer of 200 meters around each amenity.
m_circles <- st_buffer(m, dist = 200)
It looks like this:
How can I keep only the buffers (polygons) that ...
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answer
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Avoid losing overlapping areas when buffering line with Python
LineString is the path of the transport on the field with attached equipment. Is it possible to use GeoPandas or third-party Python libraries to find overlapping areas when buffering a path line to a ...
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Clipping buffers to joined polygons in QGIS
I have two vector layers in QGIS:
a layer containing building outlines for houses
a layer containing parcel outlines for properties
I used a spatial join (join attributes by location) to connect the ...
2
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1
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78
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Vector overlap analysis in QGIS
I'm in the search of the right tool to accomplish the following tasks:
I have vector layer A,B,C and D.
I want to overlay vector layer A with B, C and D.
If, for example, vector layer B is overlapping ...
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Count and list all polygon features within a polygon in ArcGIS Pro
I am trying to count and list the names of all individual layers that have polygons (in blue and green) within multiple target polygons (one example shown in orange) in a separate layer using ArcGIS ...
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Overlap Analysis of 3 layers in QGIS
I am trying to calculate the overlap area between features of three different vector layers in QGIS 3.22, but the overlap analysis tool only calculates overlap between two layers.
For example, I would ...
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Count overlapps of overlapping features in OpenLayers
Can anyone suggest how to implement a feature similar to Count Overlapping Features (https://pro.arcgis.com/en/pro-app/latest/tool-reference/analysis/count-overlapping-features.htm), but on JavaScript?...
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Checking if two polygons have internal points in common with GeoDjango and PostGIS
I am using GeoDjango with the PostGIS backend. Given two polygons I want to check if they overlap. I mean, they have interior points in common.
If we check
A.function(B)
In the following picture &...
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27
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Something like map algebra or cell statistics for vector format
I work in environmental consultancy and I have recently been tasked with generating the 'Environmental Zoning' for a road project. I use GIS in my everyday work but nothing too advanced.
I'm not sure ...
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How to get buffers to remain independent when overlapping in ArcGIS Pro?
I am using ArcGIS Pro 3.0.3.
I have several survey sites that I've put a 100m buffer around to see what the habitat composition is for each of those buffered areas.
There are several sites that are ...
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Delete every other overlapping polygon using QGIS
I have a bunch of GPS points that need to be a minimum set distance (100m) apart from each other. I have buffered these points, however this results in long chains of overlapping polygons that I need ...
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Add many to one relationships to a data table in QGIS
So I have a list of farms (points), and three other layers of catchment zones (polygons). I want to add to the farm list's data table which catchment zones the farms fall into. As there are multiple ...
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75
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QGIS 3.28 - How to display overlapping OSM polygons?
With OSM Polygons, smaller poylgons may be hidden by larger polygons. In particular, it happens with LandUse polygons overlap Building polygons.
Is there any way to display consistently 'smaller' ...
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103
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Fetching and combining field values from vector layer to another in QGIS
I have two different layers: one is a vector "polygon" layer, and the other is a vector "point" layer.
I have information (address and number) in my point layer that I would like ...
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252
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Calculating the area of an intersection in PostGIS
I've got two tables in a PostgreSQL/PostGIS database, blue and purple, both holding polygons:
Now I need to calculate the overlapping area, for each polygon of the blue grid with only one of the ...
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213
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Counting points per category in polygons using QGIS
I am looking for a QGIS function to count specific point values inside polygons. I have a number of points, all sorted in specific categories "HOOFDGROEP" and a rectangular grid (see image).
...
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2
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276
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Extending several lines at once using polygon reference layer in QGIS
I have transverse shapefile lines (blue line) with a fixed length and I would like to extend them (orange line) using another reference layer (green polygon) that has a variable shape.
The 'extend' ...
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Merging polygons based on percent overlap in PostGIS
Here is a simple representation of my table of polygons:
I want to merge the small polygons to the big ones (if they intersect) and I can't do a simple union because of cases like polygon 1 would ...
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1
answer
188
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Counting points in adjacent polygons using QGIS
I would like to sum up the amount of points in a polygon and its adjacent polygons. If possible, I would like to add a certain "weight" to the points of the adjacent polygons. Here is a ...
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2
answers
113
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Counting points in hex grid by attribute in QGIS
I'm trying to count points within a polygon layer (hexagonal grid), grouped by an attribute of the points. There are some solutions on here (Python console, SQL virtual layer) but I can't seem to get ...
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1
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Adding selection data from one layer to new field in another layer using QGIS Field Calculator
I have two polygon layers:
A) Contains around 500 river catchment areas
B) Contains 100 river catchment areas
I want to create a new data field in Catchment A showing which catchment (Catchment B) the ...
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41
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Substraction of line feature in QGIS
I have two overlapping line features. The blue line is a intercepted feature outputted of the red line (and another polygon feature).
I need to get only the red line parts where there is no ...
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3
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299
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Calculating statistics of points within polygons of the same criterion in QGIS
In my QGIS 3.10 Project, I have one polygon layer and one point layer.
Each of these layers has objects that belong to different categories based on some attributes: for simplicity, let's say RED and ...
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Aggregate using one field and retain corresponding attribute from another field in QGIS
This is a follow up question to my previous question Clip polygons to retain only top polygon in areas of overlap using QGIS and its answer.
I have successfully aggregated my overlapping polygons to ...
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320
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Clip polygons to retain only top polygon in areas of overlap using QGIS
I am working in QGIS 3.16.14 with a dataset that has many overlapping polygons representing fires that occurred in different years (all in one shapefile). I would like to clip the polygons such that ...
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1
answer
90
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Exporting list of attributes from multiple layers within extent in QGIS
I'm looking for a way to export attributed values from multiple layers in a project from features within the extent of a specific polygon (project area).
So, for example, I have a polygon layer with ...
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1
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119
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Creating iso-contours of cumulative values of overlapping polygons in QGIS
I start by drawing polygons by hand and assigning each polygon an attribute value for a frequency (or probability). What I then need is to create a heat map or iso-contours that show the cumulative ...
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39
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Identify what parcels would be protected by seawalls
I have a shapefile for land parcels near the coast. I have a shapefile with polylines that represent seawalls. Here is what I would like to do:
Spatial join seawalls with my parcels data. This is ...
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1
answer
98
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Showing full list of names of features within polygon when hovering over it in QGIS
In QGIS I've successfully joined three tables of data: 'Addresses', 'Persons', and 'Polygons'. The polygons represent the address on the map, and each address "contains" the names of all ...
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How to only check intersection once using PyQGIS
If I've two polygons a and b. If a intersects b, then there is no need to check if b intersects a. How do I check this with the PyQGIS API to ensure I'm not getting duplicate features in my output ...
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ValueError when selecting raster files that overlap an AOI using GeoPandas
I want to select only the raster files that overlap or intersect my AOI. I have a list of 900 raster files, and I calculate their footprints. Besides, I have my AOI.
Both, the footprints and the AOI ...
