Questions tagged [overlapping-features]

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

67 questions with no upvoted or accepted answers
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6
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275 views

Point cluster symbology for different categories without overlapping symbols

I'm trying to visualize crimes based on if the crime happened during day or night time. I've tried using the point displacement tool but I'm not satisfied with the results because the readability for ...
4
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1answer
1k views

Counting and rasterizing polygon overlaps in QGIS?

I have a large number of polygons that are overlapping. I'd like to create a heat map and plan on using raster calculation to do this. My plan: to give each polygon a raster value of 1, and adding ...
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36 views

Make biodiversity heatmap in QGIS out of polygons and not points

I would like to make a biodiversity heatmap in QGIS out of polygons and not points. I have a shape file made up of many overlapping polygons. I know how to make a heatmap with a set of points by using ...
2
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0answers
36 views

Display lines which share segments by offsetting them only where they overlap?

Background: As part of a route selection process I have multiple route options which often share segments. I need to keep the underlying data correct while displaying all routes in a way that they ...
2
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1answer
51 views

Clip overlap from polygons

I am trying to script the clipping of overlapping areas from a set of polygons. After having fetched features (outerFeature) a loop (innerFeature) is to check if other features intersect with area > 0....
2
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1answer
43 views

Features color based on layer's color in QGIS

Is there a way to synchronize the selection color with a layer's color in QGIS?. Following this post https://gis.stackexchange.com/questions/111784/displaying-only-selected-features-on-map-in-qgis#= ...
2
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0answers
50 views

Graduated color display of overlapping polygons in ArcMap

Is there a way to display overlapping polygons in a graduated color symbology based on the level of overlap within the same feature layer? For example, in one area of the map there are two polygons ...
2
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0answers
55 views

Select events that represent the most recent work on roads

I have a question on Stack Overflow where I ask about Selecting events that represent the most recent work on roads. So far, I have been provided an answer that seems to work, although it is quite ...
2
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0answers
153 views

Is there a “Disperse Markers” option in Mapbox GL-JS?

I have used the "Disperse Markers" tool in ArcGIS before, but I am currently working on a project where I am using Mapbox GL-JS to display point data. Many of my points overlap, and I would like them ...
2
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0answers
191 views

Calculating combined area of multiple polygons by counting overlapping area only once in R?

I'm using a shapefile in which polygons represent the geographic distribution of species. I need to calculate the combined range of several species sets, but the overlapping areas should be counted ...
2
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0answers
259 views

Joining overlapping polygons in R?

I have two shapefiles with polygons (say S1 and S2). Some of the polygons are overlapping in the two shapefiles but not perfectly. In addition some polygons from S1 are touching polygons from S2. I ...
2
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0answers
91 views

Is there a possibility to use the ring-points from displacement renderer in qgis for map-tips?

I've got as "layer 1" a point data-set and as "layer 2" a point-dataset (with the identical geometries of layer 1) with a varying number of photos (=identical points) to every point of layer 1. Is ...
2
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0answers
274 views

Overlapping despite topological editing

I am digitizing polygons from an ortophoto. In the snapping options, I enabled 'topological editing' and 'avoid intersection' of the polygon layer. I digitized some not-adjacent areas and then made a ...
2
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0answers
112 views

How to intersect layers that do not completely overlap in QGIS?

I have two layers in QGIS that I want to intersect in a specific way. On one side I have a layer of the different biotope types in the city of Berlin. On the other side I have a layer of the ...
2
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0answers
95 views

Prevent polygon feature (catchment) overlap for land-use extraction using QGIS?

My aim is to calculate catchments for around 150 points and to extract land-use variables for them. In order to do so I need a vector dataset where no polygons overlap. This, however, seems to be a ...
2
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0answers
357 views

Digitizing complex archaeological scenarios in various levels?

I don't know if this issue has already been answered, but I can't get my head around it. I used to do this in Illustrator, and there it was simply a matter of clicking "bring forward/bring back" etc. ...
2
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0answers
104 views

ArcGIS Server Map Service - Best Way To Visualize Coincident (Identical) Point Features

I have an ESRI Map Service serving out several point layers with 10k+ point features. Because of these high feature counts, I use a dynamic map service where a symbolized image is generated on the ...
2
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0answers
593 views

Overlapping Polygons

I have a project that requires us to plot floods in a certain area, the example below shows the flood areas. What I would like to know is how would I be able to shows these polygons in a better ...
2
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0answers
599 views

Drawing a road network: offsetting overlapping lines (directed graph)

Say I have a road network defined by a table, indicating, for each arc, its ID, and its head and tail node. In other words, my network is defined as a directed graph. For example, we have two points, ...
1
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0answers
40 views

Fixing Topology (Gaps and Overlaps) in QGIS

I am digitizing a new polygon shapefile of property boundaries based on orthoimagery using QGIS Zanzibar. I'm acquainted with topology editing in ArcMap using geodatabases. I did so with snapping to ...
1
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1answer
65 views

Overlap Analysis in QGIS

With QGIS 3.8 a new Tool has been introduced: Overlap Analysis. It says that it "calculates the area and percentage cover by which features from an input layer are overlapped by features from a ...
1
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0answers
51 views

Identify intersections and assign them to one of the features in a single layer

I have a single SHP-layer (12,810 features) and want first of all to identify intersections (incl. duplicates --> features with identical geometries). In the next step I want to delete/clip these ...
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0answers
27 views

Accounting for intersecting features with spatial join?

I am looking to analyse the effects of the designation Marine Conservation Zones (MCZs) on fishing effort. I have a shapefile for fishing effort which is gridded, each pixel has information about ...
1
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0answers
22 views

Calculating areas and joining attributes between overlapping features

I am working with QGIS 3.4.8 and Python 3.6.8 on OSX El Capitan 10.11.6. I have two shapefilea, one which is a grid of cells (each cell a feature) and the other one which is urban settlements as ...
1
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0answers
40 views

Selecting only coinciding points

I have a lot of points in the same layer. Many of these are coinciding. I only want the points that coincide slected or the points that don't coincide (then I can just reverse the selection). This is ...
1
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1answer
150 views

Labels overlapping annotations in ArcMap 10.6

I came across this issue regarding labels overlapping annotations in ArcMap 10.6 (picture left) where they don't overlap in 10.5 (picture right)... What am I missing? I simply opened the mxd in the ...
1
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0answers
37 views

Topology checks and error marker

I have a problem in QGIS. I want to find overlapping polygons but not only which polygon overlap with another but the exact node(vertex) that intersect or overlap. The error marker doesn't show you ...
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0answers
47 views

ArcGIS: Get coverage of Polygon A in Polygon B

We have dissemination area (DA) units for a city [Polygon B], and shapefiles of all parks in the city [Polygon A].Polygon A overlaps Polygon B in some areas. We initially wanted to calculate the ...
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0answers
150 views

Layer disappears after adding overlapping layer to OpenLayers?

I created an OpenLayers map which links to my GeoServer WFS service. I tried to do the similar process as this example. However, when I moved my mouse onto the point, the original layer disappeared ...
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0answers
177 views

ESRI Polygon cutouts (neg. space) become multiple layers in PostGIS

I have a single MULTIPOLYGON from ESRI ArcGIS with 10,000+ sub-polygons in a Shapefile, some having > 1.4 million vertices. I'm importing the data into PostGIS (ogr2ogr or shp2pgsql, same results) so ...
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0answers
107 views

Split polygon into parts adding attributes based on underlying polygon in QGIS

I am trying to split one polygon in several parts adding varying attributes depending on the overlaying other polygons. To illustrate what I am talking about: the yellow ring is a buffer zone around ...
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0answers
536 views

Aggregating image information over two features in Google Earth Engine?

As per Iterating over years for features in feature collection using Google Earth Engine?, I am currently working with the Hansen data (Global Forest Change) in Earth Engine. I have imported two ...
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0answers
391 views

How to summarize overlapping polygon values within a single layer?

At ArcGIS Desktop 10.5, I have a polygon file geodatabase feature class. Many of its polygons are spatially coincident; that is, if I click on a single polygon in Arcmap to select it, the resulting ...
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0answers
40 views

How to deal with missing values in Fishnet

I m working with ArcMap 10.2.2. I have one dataset with red deer observation (Excel Sheet) The data is joined to a polygon layer with administrative boudaries: It looks like this Blue are the red ...
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0answers
113 views

Need to find pair-wise intersection for multiple polygon layers?

I have 20 different polygons and I'd like all the pairwise intersection among them. I might be wrong, but I think Intersect isn't working because it's trying to find the intersection of all polygon ...
1
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0answers
36 views

the location of two points group with the same coordinates are not overlaped

I have two points data with the same coordinates, i add one of them by adding from Excel file and other one from CAD file, but in Arcmap the should be overlapped but it is not working. i selected the ...
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0answers
156 views

Issue with overlapping features in PostgreSQL database st_difference not working

I am working on a problem in a postgreSQL database with the Postgis extension. My issue is that I have a bunch of polygons in a table and they have some overlap. These are US census blocks. Not ...
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0answers
60 views

Highlight areas without overlapping Shapefies in QGIS 2.16

I have a dataset with several hundred shapefiles and need to ensure that there is at least double overlap throughout. I need a way to extract the areas without double overlap, or at least a way to ...
1
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0answers
720 views

Remove polygons of one layer from another polygon layer in QGIS

I have two polygon layers, A and B, both in the same projection. I am trying to create a new layer, C, which is all polygons in A less the areas where polygons in A and polygons in B intersect. I am ...
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0answers
115 views

How can I use ST_Contains/ST_Overlaps with non-simple lines?

Following the SQL of the accepted answer to How to get smallest line segments from intersection + difference of multiple overlapping lines? copied below. I'm having some difficulties assign the ids of ...
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0answers
34 views

deleting lines with smaller length and overlapping oracle spatial

I need to identifying polylines which are overlapping with each other and deleting them which is smaller in length in Oracle Spatial.
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0answers
77 views

Problem between files with same coordinate reference system

I have 2 shape-files. The first created with Qgis and the other with R studio(driver=ESRI). When I import them in qgis i see they doesn't "fit". Both have EPSG:4326 - WGS 84. The only difference I ...
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0answers
24 views

Combine group of maps to add/edit features in .NET

Use Case: I have 100s of square/rectangle shaped maps which I want to edit/add features like Dam, Ponds etc. either one map at a time (or 8 maps on each side & corner, if possible). The task is to ...
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0answers
129 views

Checking Annotation overlap with other features using ArcObjects?

I want to check annotation features overlap with any other feature and also have to give other overlapped feature list....please tell any method for this? Now i am using buffer around selected ...
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0answers
968 views

FindTask result returns an array of features but only displays the last item in the popupwindow

executing the complete findtask url generated by my application from the address bar I get back a good json object that returns 112 features I was trying to implement functionality similar to this ...
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0answers
674 views

How to simplify a self intersected / self overlapped polyline using ArcObjects?

I have a self intersected polyline, how can I break it into 5 records stored in the same table using arcobjects? (splited by vertices and the intersection point) Here is what I have got and it doesn'...
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0answers
130 views

Checking for overlaps in polygons using Oracle Spatial?

I want to get a list of all the polygons from table 2 which overlap with one polygon from table 1. Following is the query which I am trying to use which doesnt give any result. Select b.bg_id from ...
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0answers
425 views

Combine KML overlays to find overlapping shapes and export to flat file

I have two KML files with many polygons each. One has larger area polygons while the other has smaller areas. They overlap with each other and I would like to know which areas overlap with each other ...
1
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0answers
354 views

Calculate values to represent bus route attribute

I'm working with bus routes and looking for a way to represent some values in this system. I want each street to be represented by thickness based on value returned in SUM or COUNT. I don't have big ...
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0answers
312 views

Overlapping polygon outlines dashed at overlapping locations but solid elsewhere

In ArcMap 10.0, if one smaller polygon fits inside of another and shares a portion of the larger polygon's boundary, and they both are set to display thick outlines on the inside, is there a way to ...