Questions tagged [overlapping-features]

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

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46 views

Can QGIS print nested or overlapping polygons in order?

I use MapInfo-Discover and have calculated Catchment areas for analysis. MI won’t print overlapping polygons in one table in any set order; dividing the data into 100’s of tables isn’t a solution. ...
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2answers
162 views

Polygon Shapefile Overlap with a Raster

I have some raster files of an agricultural region. There are more than 50 small fields in the agricultural region. For each field, a shapefile has been provided. As shown in the image below, each ...
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120 views

Modify polygons so that they don't overlap and area stays the same

I have a set of polygons and they can overlap with each other, like this: I want to modify them in such a way that they don't overlap and the resulting surface area stays the same. Something like ...
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1answer
327 views

How to calculate the overlap of two polygons in PostGIS

I am trying to calculate the percentage overlap of two vector polygon layers and saving the result as a separate column. The code below is working: CREATE TABLE parcels_all_shapefile_new AS SELECT ...
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2answers
315 views

Summing attribute values of overlapping polyline portions in ArcGIS Desktop?

I have polylines of 80+ bus routes operating in a city. The polylines have attribute values for the number of passengers, number of trips, etc. Many of the polylines overlap at certain areas of the ...
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103 views

problem with resizing Polygons with gBuffer in R

I'm working on something and having a little problem. library(tmaptools) library(rgeos) library(raster) library(leaflet) library(dplyr) USA <- getData(country="USA",level=1) Texas <- USA[USA@...
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35 views

How to combine multiple overlapping rasters and outputs a new raster that carries the maximum value [duplicate]

I have 7 classification rasters. Each raster has probability values from 1 to 10. All of the rasters overlap each other at some areas. I would want to create a new raster that carries the maximum ...
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3answers
149 views

ArcGIS merge polygons (catchments)

I have a shape with 113 polygons. (partial catchment in hydrometric station sections). Is there any method, in ArcGIS, to overlap and merge polygons from upstream to downstream, in order to results a ...
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1answer
182 views

Finding overlapping annotations using ArcGIS Desktop?

I use about 10 annotations to produce my map. Every single one has been created separately using Tiled Labels to Annotation. I am using ArcGIS Desktop 10.3 Is there a way to find the annotations that ...
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1answer
478 views

which v.clean option is required to eliminate overlapping segments of lines?

I want to produce a polygon layer out of lines like in this image with the command poligonize: Source: QGIS create boundaries from background image The problem is that some of the lines are coming ...
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1answer
277 views

ArcMap Way to merge two shapefiles and take the average of their polygons that overlap?

So I have two shapefiles that show storm surge height values for two different areas. Nevertheless, they overlap for a good portion of their areas. When I merge them together, it seems that the ...
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1answer
84 views

Estimating area of overlap between polygons in same layer

I have a series of buffers representing service areas of bike share stations that extend 400 from the station (network distance). The polygons were generated using Network Analyst. Evidently, buffers ...
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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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1answer
49 views

Combining two layers and removing their overlap using ArcGIS Desktop?

I am using ArcGIS Desktop 10.0. I have two polygon layers showing storm surge and I want them both to be combined to look like a smooth transition into each other. However, they have an overlap and ...
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27 views

Weather Heat Map/ Hot Spot [duplicate]

I have a shapefile of tornado warning polygons. I would like to find and map the areas that have been in the most amount of warnings in that period of time. For example, I would be able to see that x ...
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0answers
48 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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1answer
45 views

Can percent overlap of polygon layers be calculated in geographic coordinate system? [duplicate]

I have two global polygon shapefiles in WGS84, and I would like to generate spatial stats on the % area of one shapefile that is overlapping the other. I understand that geometric calculations such as ...
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1answer
90 views

Changing certain attributes and creating a new field for combined data

I have this combined dataset with building heights divided up over several columns ''Height'' ''Building_h'' and ''Building_L. My end goal is to combine them all in one new column. There are however, ...
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1answer
459 views

Merging overlapping polygons with original polygons in QGIS

I have a large vector shapefile dataset containing polygons, many of which overlap. I want to assign each overlapping section to one of the original overlapping polygons. E.g. if polygon A overlaps ...
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0answers
163 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 ...
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0answers
168 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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1answer
429 views

How to adjust placement of piechart symbols to prevent overlapping for a hardcopy?

My map is crowded with pie chart symbols that overlap and obscure each other. Is there a way to draw these symbols so they don't overlap, perhaps drawing them not in their actual location but in a ...
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1answer
52 views

Adding Values in Overlapping Buffers

I have a series of points that represent oil and gas wells (over 1,000), and an emissions value for each well. I created 3 concentric buffers that represent increasing distance from the well, and ...
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1answer
147 views

delete overlapping points [closed]

I have two different files. One data represents points in green, another - points in red. I want to select points in red, but only those, which has no intersection with green points. What solution ...
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290 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 ...
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1answer
274 views

Topology checker does not show error for one polygon fully within another polygon as overlap

Its about QGIS. In the attached screenshot, the topology checker does show error for the overlap for the two large polygons (1 and 2); but it does not show an error for the smallest (3) and the left ...
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0answers
178 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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2answers
207 views

Creating holes from overlapping polygons in ArcObjects and C#?

I have a polygon layer which contains some overlapping polygons. I want Holes instead of overlapping polygons. i tried some code ESRI.ArcGIS.ArcMapUI.IMxDocument mxd = ArcMap....
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2answers
308 views

Calculating Area Percentage of multiple overlapping polygons using ArcGIS Desktop?

I am having some trouble with a particular problem regarding area % in Arc. I have 5 layers, each representing a different data quality, A1, A2, B, C, Overall extent. Each layer has dozens of ...
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0answers
53 views

Making darkness/intensity of overlapping buffers additive? [closed]

I don't know much about GIS, but I want to create some maps that show a particular thing. Specifically, I have a shapefile with several hundred points and I want to create a standard sized buffer ...
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0answers
211 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 ...
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1answer
104 views

Show how many Polygons are overlapping in different styles

First of all I use QGIS. I got a bunch of polygons that describe a 10 min. footway from different addresses. What I want to do now is to illustrate the areas where the polygons are overlapping. My ...
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1answer
742 views

Spreading/dispersing overlapping points?

I have a set of 150 sites globally, and I want to map them, and colour by a given variable. Unfortunately they are very non-uniformly distributed, with many of them in small clusters of only a few ...
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2answers
39 views

Identifying the nearest center of a buffer for an observation when buffers overlap [closed]

I am using ArcGIS 10.5. Desktop version and would like to do the following: I have a 150 points with coordinates over a map of a city and would like to create 300m buffers around each of them. I also ...
3
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1answer
900 views

Merging overlapping lines into one line. QGIS

I have a shapefile with multiple perfectly overlapping lines. Each line represents traffic at a certain point in time. I would like my output to have only one line but with the attributes from all ...
2
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1answer
74 views

Counting Polylines on top of one another in ArcGIS Desktop?

I have a walking network, split into links.. Each link has more than one feature on top of each other which represents the number of times it was used within my network when plotting routes from ...
2
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1answer
296 views

Obtaining and counting overlapping line segments after adding ST_ClosestPoints with PostGIS

I have some LineStrings that overlap in some segments, but not necessarily with coinciding vertices, like shown in the example below. With PostGIS I would like to extract all "segments" and count how ...
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1answer
596 views

Find overlapping polygons (“have their center within”) within the layer (ArcMap 10.4)

I have a feature layer of locations of invasive plants (polygons). Those were entered by several different people, so there is a lot of overlays: What I want to do is to dissolve all the overlapping ...
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1answer
71 views

How can I transfer the values of a grid of smaller polygons to another grid with larger polygons in ArcGIS?

I have a population density grid containing 100x100m polygons. I would like to transfer the density values into an existing overlaying grid of larger polygons (250x250m). This might of course include ...
2
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1answer
2k views

Using Shapely & Python to remove overlapping polygons in one dataset

I am looking for a method using python to remove a large amount of overlapping polygons from one collection. These polygons are grouped together based on imagery collection and have been stored as WKB ...
5
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1answer
255 views

Convert polygon to grid lines

I have a QGIS project with several shapefiles like the one in following image. I want to know how many times the shapefiles overlap and where is produced a gradient. I think the best option is to ...
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2answers
130 views

How to query GIS data for overlaps? [closed]

I am trying to get a list of Election Districts inside particular City Council Districts in Brooklyn, NY. The data that is available is GIS data, visible here: City Council Districts: https://data....
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1answer
59 views

One of the 3 clipped Landsat images does not overlap with 2 others in ArcMap [closed]

I am analyzing forest cover change using 3 time-series Landsat data. The whole scene (185 x 185 km) images overlap in ArcMap display completely. However, when I subset/clip the images to my study site ...
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1answer
48 views

Only selecting areas not overlapped by another layer in ArcMap?

How do I create a layer that displays only the bright red areas on the map (The areas of the red layer that are not overlapped by the purple or yellow layer)?
4
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2answers
775 views

How to get all attributes from overlapping polygons with identical geometry into one single polygon in QGIS

I have one layer that has overlapping polygons with exact geometries. The most polygons that overlap are 5. For each polygon stack I would like to extract the values of a single field from EACH of the ...
4
votes
1answer
317 views

Deleting overlapping lines using ArcGIS Desktop?

I have a shapefile that has most of the lines spaced at regular intervals. However, there are some lines that are overlapped with each other or at very close distance to each other (figure for your ...
3
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1answer
54 views

Finding number of categories that fall within buffer in ArcGIS Desktop?

I have two categorical datasets (polygons) and I am trying to find out how many of the categories fall within a buffer for each (one has 8 categories, the other 33). I have used 'tabulate ...
5
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1answer
157 views

Calculating area of intersecting polygons within severals overlapping buffers

I am working with.. an initial point layer (in blue) called : centroid_layer.shp an initial polygon layer (in green) of woods called : wood_zone.shp ..and I need to get the area of intersected ...
2
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1answer
513 views

Combining overlapping polygons and their attributes using ArcGIS Desktop?

I have two global polygon features (layers). One is the highly detailed country shapes GADM (Global Administrative Areas) and is overlapping the less border accurate TDWG (World Geographical Scheme ...
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1answer
460 views

All WMS layers not showing in OpenLayers?

I'm trying to display information on OpenLayers from different sources, I guess the problem is that some of these layers has information for the same areas as another layer already has. And OpenLayers ...