Questions tagged [overlapping-features]
Features that share some or all of their spatial location with other features.
688
questions
1
vote
1answer
44 views
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 ...
1
vote
1answer
33 views
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 ...
3
votes
1answer
50 views
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 ...
0
votes
0answers
36 views
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 ...
4
votes
2answers
96 views
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 ...
0
votes
1answer
26 views
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 ...
1
vote
1answer
28 views
Non-overlapping geometries from two different objects in R
I can select geometries that overlap from two objects (basic example):
library(sf)
# create a simple square
sq <- rbind(c(3, 3), c(15, 3), c(15, 15), c(3, 15), c(3, 3)) %>% list %>% ...
1
vote
0answers
22 views
R + Assign a cell overlapping two countries to the one with the largest surface area
Some cell overlap two countries. Example, in the picture, cell n°85376 overlap Lesotho and South Africa.
I would like to identify the country that has the largest share of the columns values (Cereal,...
3
votes
1answer
96 views
Turning overlapping MultiPolygons into not overlapping areas
I have a layer containing MultiPolygons. These MultiPolygons do overlap each other and do have a not unique attribute time containing integers. The number of polygons per layer vary as well as the ...
4
votes
3answers
183 views
Skipping invalid geometries without fixing them in QGIS
In QGIS 3.16.14 I have a shapefile with multipolygons (flood risk map of the country) and another layer of points (buildings). I need to identify which of those points are inside those polygons and ...
1
vote
1answer
46 views
Merge two overlapping DEM files in QGIS
I am trying to combine two overlapping DEM files in QGIS and I can't do it. Let's see if I can explain myself well with these photos, but I would like to use the DEM A as a base and fill it with the ...
0
votes
0answers
17 views
Geometry Checker not removing overlap
I am running QGIS 3.16.15. I have a polygon with many overlaps between the polygons. I am trying to fix this using the Geometry Checker plugin.
However, despite selecting the 'Remove overlapping area'...
3
votes
2answers
139 views
Displaying overlapping polylines using QGIS
I have some route data with several routes which follow the same path for a distance. I would like to display the data showing thicker polylines where routes overlap, the more that overlap the thicker ...
2
votes
1answer
43 views
Extracting the attributes of one shapefile from the overlap of another using sf
I'm building a movement model with some animal tracking data using a Brownian bridge.
I use the resultant shape to measure how much of it overlaps with protected areas in the region (https://www....
4
votes
3answers
117 views
Creating difference of two polygon layers using Virtual layer in QGIS
I am trying to learn the usage of Virtual Layers in QGIS but I can't find a solution for a problem that seems very simple.
I have two polygon layers and I want to have the difference.
Polygon layer 1:
...
1
vote
3answers
134 views
Joining attributes in CSV by location using QGIS
I have a shapefile which divides Africa in cells of 0.5x0.5 decimal degrees. This documents provides the longitude, latitude of the centroid of the cell and a unique identified of each cell.
On the ...
5
votes
5answers
216 views
Merging polygons only if three or more are on top of each other in QGIS
I am working on a layer with many polygons (circles). I would like to create a polygon containing only the areas where 3 or more circles overlap (in my example there would be only 1 area in the east). ...
1
vote
0answers
24 views
Trimming polygon based on its intersection with another polygon using shapely [closed]
I have two polygons intersecting with one another (x1 and x2). How can i trim x2 by the area it intersects with x1, such that x1 and x2 no longer overlap and x1 area/shape remains constant.
from ...
3
votes
3answers
135 views
Assigning point attribute to overlapping polygon in QGIS
Are there a way to assign the attributes of a point to a overlapping polygon?
I got the data as lines and points. The lines are making the polygons and the points are overlapping the created polygon ...
2
votes
1answer
43 views
Merging polygons that touch each other in QGIS [duplicate]
I am searching for a tool that can merge the polygons that touch each other. I am not very good with python or programming. Is there a function in the toolbar that can help me with the problem?
In the ...
4
votes
2answers
56 views
Counting features of point layer that are laying within polygon layer using QGIS
I have a 'Layer 1' that represents geographical areas. And another 'Layer 2' contains some location-based information.
I want to count/aggregate the tweets per geographical using QGIS. For example, in ...
7
votes
3answers
332 views
Dissolving polygons contained within the same larger polygon in QGIS
There is a layer in QGIS that contains multiple polygons, and I want to dissolve the polygons which are inside another polygon.
I don't want to dissolve the entire layer of polygons. For example, in ...
0
votes
1answer
45 views
Summing values of field in polyline layer that intersects grid in QGIS [closed]
In QGIS I have created a grid. Now I want this grid to be intersected with a line shape. The line shape contains numbers in field "x". I want to know the sum of field "x" in each ...
0
votes
0answers
21 views
Outer overlaps in Terra R
I am relatively new to R and GIS in R especially. Just recently started to quit QGIS to use terra in R. I have tried a couple of times to do overlaps (intersect) and also to merge a data frame into a ...
2
votes
0answers
24 views
Dissolving polygons within another polygon in QGIS
I have multiple pixels in a shapefile 'delete_pixels.shp' that are within a different polygon 'delete_id.shp'.
I would like to dissolve the pixels that are within the polygons of 'delete_id.shp'. ...
3
votes
1answer
37 views
Adding list of overlapping polygons to attributes of unique polygons in QGIS
I have two vector layers each made up of around 1000 unique polygons. Is there a way to add to the attributes of each polygon in Layer 1 a list of the polygons it overlaps in Layer 2? Can this be ...
3
votes
3answers
78 views
Extracting overlapping polygons within same layer in QGIS
I want to extract all overlapping areas in the same polygon layer, where borders from e.g. area 1 and area 2 (picture) overlap. I have tried "intersection" with the same layer as input and ...
5
votes
2answers
119 views
Turning labels off within polygon in QGIS Atlas
Is there a setting to turn off labels within a polygon in an Atlas?
In the example below I don't want labels to show in the grey inset area.
I have tried the new clipping functionality
All the label ...
5
votes
2answers
140 views
Removing unknown shape from polygon shapefile in QGIS
I have a shapefile of the region of districts. When I zoomed in, I found a region under the district that shouldn't be here. I want to remove it and when I go down in toggle editing, delete part it ...
0
votes
0answers
20 views
Meaning of merge rules for overlapping features in spatial join
I used Spatial Join in ArcGIS Pro. The joining features were polygons with overlaps. There were some areas where 5 features overlapped each other.
I used the default merge first tool and one-to-one ...
1
vote
1answer
40 views
Create a frequency map from overlapping polygons (for large/complex polygons)
I have vector layers (polygons) of burned areas for a series of 33 years and i need to create a frequency map from the overlapping of this polygons (1 if there is no overlapping, 2 if there are two ...
5
votes
4answers
545 views
Calculating polygon area within other polygon using GeoPandas
I have a polygon GeoDataFrame 'Polygons' with attribute "AREA" (total polygon area in ha) and another GeoDataFrame 'Small_polygon' with smaller polygons within the 'Polygons'.
How do I ...
2
votes
0answers
49 views
Selecting polygons within other polygons in the same layer in QGIS
I am trying to filter out certain infrastructure from OSM data and convert everything to simple point layers using QGIS.
I have an OSM shapefile containing polygons of schools. In many instances, ...
2
votes
0answers
130 views
Tiny slivers and overlaps, even when using snapping when digitizing
I am in the process of creating several large shapefiles of administrative divisions in Europe. I digitized them using the snapping feature as well as the tracing feature. There are no visible ...
2
votes
1answer
103 views
Setting attribute of point if it matches point from another layer in QGIS
I have two layers of points:
The first layer contains points which have an attribute called "svf" with values between 0 and 1
The second layer contains a subset (in terms of location) of ...
3
votes
1answer
91 views
Is it possible to extract tiles layer as raster in QGIS?
Let's say I have a shapefile that contains multiple polygons and I open it on QGIS:
Let's also say that I activate the OpenStreetMap tiles layer under it:
I'd like to find a way to extract the tiles ...
2
votes
1answer
60 views
Spatial join of two polygons using GeoPandas
I am trying to preform a spatial join between two vector files where i have one polygon-grid and a classified vector-file, as shown below:
I would like to be able to classify my grid according to the ...
7
votes
2answers
203 views
Get resulting polygon that is overlapped by others
What I basically want is:
I want to have the polygon which is numbered as 13.
As you can see there are many overlapping polygons but the most overlapping one is numbered 13. The image is from this ...
1
vote
1answer
170 views
ERROR 999999: Something unexpected caused the tool to fail
Application: ArcGIS Pro 2.8.3
Tool: Remove Overlap (Multiple) Analysis and Business Analyst
Feature Classes: Both polygon and overlapping
Method: Center Line
Coordinate System: WGS1984 (Both layers ...
2
votes
0answers
137 views
Meaning of "No spatial index exists for join layer" when doing spatial join in QGIS
I am doing a spatial join by location.
My input layer is a shp file. It is a grid cell of the African of 0.5 x 0.5 degree latitude. It contains, a gid number which identifies the cell, the longitude ...
3
votes
1answer
54 views
Cutting polygons with MultiLine layer using QGIS
I'm trying to cut a polygon layer with a line I've created in part by copy-pasting lines from various source shapefiles and in part by hand-drawing segments to connect those.
For clarity, the end goal ...
2
votes
2answers
77 views
Calculating how much of polygon is within certain boundary in QGIS
I work for a local authority and I'm measuring the surface area of river catchments inside our local authority.
I have a polygon layer showing me the catchments but a few of them go over our boundary ...
3
votes
2answers
79 views
Clipping vector layer with preserving boundaries of polygons in QGIS
I would like to clip a vector layer containing buildings by a rectangular boundary (also a vector layer). However, rather than cutting straight through the buildings at the boundary, I want it to ...
6
votes
1answer
78 views
Using "Select by location" with percentage
I have two layers, one layer with isochrones with representing driving times from certain locations and one layer with postal code area's.
What I want to know is which postal code area can be reached ...
0
votes
0answers
70 views
Seeking algorithm other than Convex-Hull to avoid overlapping polygons
I want to draw polygons with no overlap, based on sets of points. If I use Convex Hull algorithm to deduce the boundary polygon, it's pretty obvious that the resulting polygons WILL overlap. Is there ...
4
votes
1answer
80 views
"Duplicate column name" error when calculating length of shared boundaries between multiple polygons using Virtual Layer in QGIS
Similarly to the poster from this question, I am trying to calculate the length of the boundaries between several polygons. I have two types of polygons (1:blue and 2:pink), but I don't think that ...
4
votes
1answer
162 views
Intersect polygons returns true instead of geometry
I try to do a simple cut between two layers and PostGIS returns a boolean instead of a geometry
select
t1.id,
st_intersects(t1.geom, t2.geom) geom
from
public.table1 t1
inner join
...
7
votes
2answers
216 views
Dissolving polygons that intersects in QGIS
I want to gather all the polygons in my shapefile that intersects with each other in several groups. If they had shared a common field I would have used the "Dissolve" tool but they don't ...
1
vote
0answers
28 views
Cutting overlapping line by priorities
I have several line layers following an unique and same path.
On some part, these layers overlap each others, so there are multiples segments overlapping.
I need to find a way which grants me the ...
2
votes
1answer
36 views
Two label rules - display dependency
I want to make a labels for point layer which has two columns: town name and number of residents. I made two rules: first for names and second for numbers. Each of them has different styles so I had ...
