Questions tagged [overlapping-features]

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

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Finding overlapping polygons of two Spatial Polygon Data Frames using R

I am new to GIS and GIS in R. I have two spdf's, one contains the marine ecoregions of the world (MEOW), the other one contains Exclusive Economic Zones (EEZ) of the world. I want to find which ...
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62 views

ST_Overlaps in return TRUE for adjacent polygons - PostGIS

I'm trying to find overlapping polygons with ST_Overlaps function. Everything works fine but there are cases when ST_Overlaps returns TRUE for adjacent polygons. Example: POLYGON((145053.95 167055.18,...
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40 views

QGIS, Number of Lines through a Point (of over lapping multiline shapefile)

I am doing an irrigation system analysis, for that there are multiple overlapping lines are passing through multiple points. one number of line means a unit volume of the system, and point means a ...
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115 views

Why do clipped polygon features (clipped with adjacent polygon tiles) still overlap with each other?

I have two layers in QGIS with intersecting polygons (blue "P1" and green "P2"). I want to clip them with adjacent polygons tiles (dotted line - blue "cut1" and green &...
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1answer
61 views

Removing overlapping polygons using QGIS [duplicate]

I have many polygons in a single shapefile and they are overlapping (first figure). Is there a tool in QGIS to only keep one overlapping area as the one shows in the second figure? There is a "...
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2answers
126 views

Dissolve features according to an order set by a field

I want to dissolve overlapping feature according to a specified order using an attribute field. For instance if I have three overlapping features, like the image below, I'd want to keep the purple ...
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27 views

Are there limits on the number of unique polygons created by the QGIS Union tool?

Is there a limit on the number of polygons that the Union tool will compute? I have overlapping radii from a variety of sources pictured below, but the tool continues to give me an "GEOS ...
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1answer
95 views

Correcting the geometry of overlapping polygons in the same layer in QGIS

I have a shapefile with buildings defined as polygons. Some of them are partially overlapped. They are all in the same layer. I can identify the overlapping using the "Topology Checker" but ...
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49 views

Least number of polygons to cover vector in QGIS

I have two layers : Polygon rectangles layer representing different footprints Line layer representing roads I want to know what is the least number of polygons from the polygon layer do I need to ...
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1answer
41 views

Calculating frequency of polygon types overlapping coordinate point

I have shapefiles of sea ice coverage for multiple days of the year. At each time-point (day) the sea ice is split into different polygons which corresponds to different ice types (i.e. fast ice, ...
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41 views

Is this a safe way to enforce non overlapping polygons or can it cause data corruption?

In this answer and comments it is explained that it it possible to implement a non overlapping polygon constraint using exclude and a custom operator. This is using PostGIS and not the built in ...
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1answer
57 views

Getting the segment of a line, crossed by another with QGIS expression

I have two line layers in QGIS 3.16: line 1 (blue), line 2 (red). The white points are the vertexes (nodes) of the two lines. They have no common vertex, are not connected. How can I get the segment ...
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70 views

PostGIS - Fast area computation on large overlapping (or not) polygon dataset

I'm co-developing an PostGIS based API that will work with complex and potentially large sets (>10k) of polygons, extracted from a large table following custom, user defined filters. I have ...
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1answer
75 views

Concatenating names of the districts and the numbers of the sections in the polygonal layer of streets based on intersection

In QGIS 3.14 I want for a layer with street contours (polygons) to record the names of the areas through which the street passes and the numbers of cadastral plots through which it passes. If a street ...
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1answer
29 views

Overlap area of features from same feature class

Is there a way to calculate the area of overlap between features (polygons) from the same feature class. See figure below as illustration for example. There are 3 features with an ID and area and I ...
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How to obtain summary of overlapping vector layers by attribute (eg land use within properties) - QGIS

I am trying to determine a repeatable methodology for obtaining a land use change summary for a number of properties. Inputs (both in same coordinate system): Land Use Change shapefile with a number ...
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1answer
133 views

Preventing labels from overlapping certain features using QGIS

I have two layers in my QGIS Project (QGIS 3.4.8). One in the foreground, which contains surfaces, and one in the background, which contains a point with labels, see image below: The problem is that ...
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1answer
30 views

Overlapping score for each feature in the merged layer after spatial joins

I've clicked on the Join attributes by location button and can join two layers. But in the merged layer, how do I find out percentage of overlap/intersect calculated for each feature? For example, in ...
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1answer
51 views

Spatial Query for centroid of one feature falls within another

I am looking at doing a spatial query where I can find when the center of one feature falls within another. Both geometries are on different layers. For example, when the center (centroid) of an area (...
3
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1answer
70 views

“Join Attributes by location (summary)” only with more than 50% of overlapping area

I have been using the "Join attributes by location (summary)" tool in QGIS to help create heatmaps. I am wondering if there is a way to only join a feature if it overlaps more than 50% ...
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1answer
76 views

Finding area of polygons within buffer [duplicate]

I have 102 different sites in two cities, which I have created buffer zones for. I also have layers that have polygons for different landscape features (e.g. water surface area). I am trying to find a ...
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1answer
35 views

How to change property of features in a FeatureCollection where there is overlapping?

I have two feature collections and I want to change the features' property in one collection based on the other one where there is overlapping, but it seems that I just merge and keep both features ...
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1answer
94 views

Removing overlapping sf lines in R

I have sfc LINESTRING and I would like to remove overlapping lines. Object data was created from an algorithm that joins lines with minimum distance. Using unique will not remove the initial lines. ...
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1answer
52 views

Calculate percentage of each biome on each national state in QGIS

I have one shapefile of Brazilian states (black lines) and another shapefile of Brazilian biomes (colored areas). I want to add, on the states' attribute table, the percentage of each state's area ...
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86 views

How to detect overlapping features from 2 different layers with Mapbox GL JS

I have 2 layers in total, one is a point layer where each point represent the location and attributes of a company, the other is a draggable polygon layer which is regarded as a filter for spatial ...
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32 views

Clipping line with overlaying line in QGIS

I have two layers of line which overlap as seen in the picture. I would like to cut out the first picture with the other as an overlap and then merge them together to get one single layer. Or is there ...
3
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1answer
48 views

Which buildings have access to nature where more than 50% of the nature area is closer than 3km?

I have 1) a file with all the residential buildings in a small municipality and 2) a file with all the surrounding green areas. I'm having a hard time solving this because the residential buildings ...
2
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1answer
97 views

Removing overlapped buffers using Google Earth Engine

I have a line split up into line segments, with each segment having a buffer around that. I’m trying to remove where they overlap (basically where the darker circles are within the line buffer itself),...
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50 views

Counting every part of polygons inside another polygon feature class in ArcGIS

I have two polygon feature classes. The first one represents lithostratygraphy distribution. The second one is an artificial grid polygon feature class. I want to count the absolute number of patches ...
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2answers
42 views

GIS ArcMap 10.7 Layers have different scale and cant stack together

I am using Windows 10 system and ArcMap 10.7. I have three layers, A, B, C. I tend to stack these three layers, the order should be A on B on C. I can put A on C, but I cannot put B on C. I thought ...
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3answers
147 views

Calculating proportional area of polygon covered by circle [closed]

I have two layers here (ignore the green layer), blue polygons and black circles. I want to calculate for each circle, what percent of the each of the blue polygons does it cover. For example, the ...
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1answer
47 views

Applying offset to lines that are on top of each other, result like metro map [duplicate]

As you can see from my picture there are a lot of places where the same lines run on top of each other. Imagine a tram map. How can I make sure that the ones that are behind are visible too? Just ...
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0answers
40 views

Joining attribute of smaller polygon to attribute of biggest polygon when they are overlapping

I have two shapefile layers which include polygons. Each polygon on the first shapefile overlaps a polygon on the other shapefile. I am trying to join the attribute of smaller polygons to the ...
2
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1answer
55 views

Creating aggregate attribute from two polygon layers

I have two layers: one underlying land use information layer (with columns 'land_use_type' and 'area') and one for leased land. To organize the leasing of the land it would be important that when ...
2
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1answer
39 views

Estimate population with two overlapping shapefiles

I have two levels of geography: blue polygons (18,000 districts) and black polygons (400 districts). But, I only have population data for the blue areas Is there a tool in Arc Map which will estimate ...
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1answer
23 views

Adding temporal attributes of larger polygons onto many smaller overlaying polygons

I am currently working with rainfall data on a large grid layer and want to transfer the data onto smaller grids. In the image below the large blue polygons currently have the data stored in them and ...
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23 views

List points from other layer where intersects with line

I want to make an easy script for QGIS calc. I have 2 layers (points, and line). Painting the line crosing by points. At end I want to automaticly fill fild (text attribute) with list of points. I was ...
2
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2answers
45 views

Find polygons that overlaps in the same layer with SQL

I have one layer with 40k polygons and I would like to create new layer only with the polygons that overlap each other. I have tried to use the SQL in the db manager in order to create some separation ...
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2answers
41 views

Finding Overlapping/Close Points of Same Layer in ArcGIS Pro

I have a dataset of point features with photo attachments of street signs from volunteers through the Survey123 app. The app records their location which ultimately creates the point feature. Part of ...
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130 views

Zonal statistics for multiple rasters with overlapping polygons

I have a shapefile with 300 polygons that correspond to 300 rasters (the rasters have the exact same extent than their corresponding polygons). What I'm trying to do is to run Zonal Statistics on this ...
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18 views

Need to arrange the point features in a row or inverted triangle

Need to arrange the overlapping point features in a row or inverted triangle which are in same layer with 0.1 offset. enter image description here ps://i.stack.imgur.com/B8idh.png
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1answer
128 views

How to deal with overlapping polygons from GeoJSON in OpenLayers 4

I have a series of GeoJSON files (generated by QGIS) loaded on to a map in OpenLayers 4 as different layers. Each file contains multiple polygons. When mouse-clicking each polygon a pop-up window ...
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0answers
41 views

Assigning attribute by location for multiple layers

I am trying to assign values by location of one of my polygon layer. It is overlayed by multiple polygon layers and I want to assign the value of the layer that covers it the most. Is there a tool or ...
3
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2answers
172 views

Joining attributes by the biggest overlapping areas

I have two layers and I want to join the attribute of them together in QGIS. Unfortunately, the overlapping layer (The Blue one) ist not very precicse, so there are parts that overlap on small areas. ...
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1answer
79 views

Removing overlapping polygons in QGIS using attribute value?

In QGIS, how do you remove overlapping polygons and control which polygon gets deleted? I’ve used the delete geometries tool to remove overlapping polygons within a layer but this doesn’t allow me to ...
3
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1answer
158 views

Calculating percent overlap between polygon shapefile and grid using QGIS

I want to calculate what percentage of each grid square is covered by part of a polygon shapefile in QGIS. So far I can get a column of whether a grid square touches the polygon or not (0 or 1), but I ...
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1answer
63 views

Erase tool not erasing all overlapping features in ArcGIS Pro

I am using ArcGIS Pro. I have two land maps which are each polygon feature classes composed of multiple polygons. I want to erase overlapping features by using the erase tool. To ensure the erase has ...
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17 views

How to calculate the exact area of three 1 km buffers that have been intersected?

I am trying to figure out the exact area of overlap of the 1 km buffers around three survey posts. I have used the Intersect tool to produce three individual intercepts which cover all the overlap of ...
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1answer
37 views

Why rasters of the same projections don't overlap?

I tried to search for existing questions to see if I could find answers, but I didn't. I have two rasters as shown. The raster with gray borders is not titling the right way. It should have tilted ...
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0answers
19 views

Getting overlap of supply catchments using ArcMap

I need to know, how much each of my calculated catchments is overlapped by the others, to assess the supply of the commodity per source point. I calculated supply catchments for a total of 110 point ...

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