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

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0answers
30 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 ...
1
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1answer
20 views

Weighted polygon-feature-classes combination/overlay analysis using ArcGIS for Desktop?

I have several (sometimes, not always overlapping) Polygon Feature Classes which are all weighted/ranked through a field from 1 to 10 (10 is best). I would like to combine/overlay these layers them, ...
0
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1answer
20 views

Subset of lines that are within polygon in R

I have a large SpatialLinesDataFrame (~23000 features) and a SpatialPolygonsDataFrame (8 features). I want to make 8 new variables, each with the lines that are on the same locations as the polygons. ...
1
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1answer
56 views

ArcGIS - how to join attributes of overlapping polygons

Given two tables each with unique attribute sets, how do I merge the attributes of one layer onto the other, or create a new layer containing the attributes from both? The image shows my two layers: ...
0
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2answers
35 views

Counting overlaps in ArcMap?

How can I count/find overlaps in ArcMap 10.4 but between area and line features (for example buildings and roads? Using topology I can find overlaps only between line-line or area-area feature.
1
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1answer
28 views

How to extract values from a raster stack within overlapping buffers?

In R, I have a raster stack with 6 variables. I would like to extract the mean and maximum value of each variable at 300 coordinates within a 500m buffer radius and a 1km buffer radius. In ArcGIS 10....
3
votes
2answers
82 views

Count duplicates in ArcGIS, ArcMap 10.4

How can I find how many duplicates I have in my dataset (areas, lines, points) using ArcMap? With topology I can find overlapping objects, but I want to find duplicates. Are there any tools from ...
4
votes
2answers
57 views

Display multiple identical polygons (with different attributes) on map

I need to create maps of multiple species in a certain area. However sometimes multiple species occurr in the exact same area. This results in two identical polygons on top of each other. Many of ...
2
votes
1answer
54 views

How to split overlapping linestrings?

I'm new to PostGIS and a bit lost... I work with linestrings that sometimes overlap, for example: I'd like to distinguish these linestrings by splitting them like Google Maps do: I was thinking ...
0
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0answers
33 views

Is it possible to intersect multiple polygon shapefiles to identify areas where two or more layers overlap?

I have 19 polygon shapefile layers, with some occasionally overlapping with one another. As a final output, I would like a shapefile that includes only the overlapping areas between 2 or more of these ...
0
votes
1answer
31 views

Consolidating many-to-one overlapping polygon feature values into another polygon attribute using ArcGIS for Desktop?

I have a situation similar to the one here: Spatial join - many to one however the desired end product is a dissolved/aggregated feature that collects up all the values it was joined to. For example ...
0
votes
1answer
21 views

How to group overlapping polygon features to generate unique feature ID?

I have a group on onshore leases that are overlapping and I want to generate a field attribute so that all the polygons (or centroids of the polygons) that overlap have a unique ID so that I can ...
1
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0answers
28 views

Query regarding overlapping polygons [closed]

I have one shapefile which has 78765 polygons of different year, path and row. I want to remove the polygons which has more than 80% of overlap. Can somebody help me because symmetrical difference, ...
1
vote
1answer
53 views

PostGIS ST_Difference function returns wrong geometry in result

I have a strange st_difference behaviour. I’ve got two overlapping lines (each one has two points), but st_difference result is complete geometry of the first line. The code to reproduce is here: ...
5
votes
2answers
130 views

How to sum attribute values for areas where multiple polgons overlap?

I have one shapefile with many polygons (at least 100). Each polygon has a value. Almost all these polygons overlap with each other. I want to sum the values of the polygons in the overlappings depend ...
2
votes
1answer
22 views

Extracting the geometry of the parts not intersecting from 2 shapes overlapping each other in postgresql?

This seems simple enough, yet i do not find a clear awnser on that peculiar matter. What i am trying to do is to extract the parts of a shape that doesn't intersect with another when the 2 of them are ...
1
vote
2answers
75 views

Define if two polygon layers are overlapped completely in ArcGIS

I will try to be as detailed as I can. I have created a Script tool. In this tool, I have two parameters: a) the Landuse and b) the Flight. In the ToolValidator, I used the following code to check ...
1
vote
1answer
19 views

Applying the attributes of polygons to a line segment

I am trying to classify a line segment (pipeline) based off of surrounding features. I have created polygons that contain the necessary attributes (count of total nearby houses) that overlap this ...
0
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4answers
91 views

Count Points on Points using arcpy

I have a point feature class which contains features scattered around the city, with some of the points intersecting other points. These intersecting features are correctly different features (they ...
0
votes
1answer
29 views

Using a overlap with a different layer file to create a simple Y/N field in attributes of another layer

I have two layers, which I wish to use one of to educate and populate an attribute field in the other layer with a simple Yes/No for if they overlap in terms of location. Is there a simple way to do ...
3
votes
2answers
124 views

Alternative to ST_Union/ST_MemUnion for merging overlapping polygons using PostGIS?

New to PostGIS so I trust this is a very basic question but can't seem to find the right solution. I have a materialized view consisting of ~4 million polygons. Some of them overlap. I need to merge ...
1
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0answers
27 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 ...
-2
votes
1answer
48 views

How to delete a layer which is overlap in ArcMap?

I had merged two shapefiles. How to delete a shapefiles which is I give a red sign? It's like overlapping another shapefiles so I got trouble when I colouring them.
5
votes
1answer
110 views

How to get smallest line segments from intersection + difference of multiple overlapping lines?

Inspired by this question, and this excellent answer. I have multiple overlapping lines and want to extract the complete intersection of them. So from this sample data SELECT id, geom INTO stackex ...
6
votes
1answer
73 views

Showing density of overlapping features via transparency in ArcMap?

Below is a famous map produced by the Facebook team, which shows the connections between their users. Where there are multiple overlapping features, the lines show more brightly, giving a clear ...
6
votes
1answer
260 views

Determining if two polygons are overlapping in Google Maps?

I'm working with google maps and polygons, but I have to validate that polygons are not overlapping each other. I have a function that returns TRUE when a point (lat, lng) is inside a polygon, but it'...
1
vote
1answer
36 views

Partitioning value (100 tonnes/ha) of underlying shapefile to multiple features in same shapefile in areas that overlap using ArcGIS for Desktop?

I have tried searching for an answer but can't think of a way to generalize my question to other scenarios. Looking for answers using ArcMAP 10.1. I currently have two shapefiles. One contains ...
1
vote
1answer
38 views

PTV_Mercator correctly recalculated to WGS84 EPGS:4326 but not correct on map

I have recalculated PTV_Mercator (PTV Spherical Mercator EPSG:505456) coordinates to WGS84 EPGS:4326 coordinates in Excel. And when checking them on Google Maps they show up correct. But after ...
0
votes
1answer
33 views

Combining overlapping polygons to make a raster

I'm working in Arcmap10.3. I have some polygons layers that over lap that I want to merge to one polygon layer. Then I want to convert it to a raster in the end. I want the top layer of the 4 input ...
3
votes
0answers
73 views

How to join specific attributes of two polyline shape files that overlapped but information is stored differently (QGIS)?

I have just started using QGIS (2.12.3) and I need your help. Overall, I have two polyline shape files with the same geometry (the one layer overlaps the other), but the information is stored in a ...
3
votes
2answers
121 views

How to delete overlapping inside same polygon?

I have same polygon partially overlapped: How to delete overlapping and merge it to same area? I am using QGIS 2.4.0.
2
votes
2answers
36 views

Create polygon label on both sides of polyline overlaping polygon

The image below represents areas which are as a final product exported to PDF as individual PDF's cut on the black line. The labels are created in a usual way. I need to generate labels and after ...
2
votes
1answer
67 views

Create frequency polygon from overlapping features in another polygon

Mac 10.9.5; QGIS 2.8.4-Wien; history and unioned data, in GDA94, zone 55 here. I have a polygon of fire history with a number of overlapping features. I want to create a new polygon for fire ...
1
vote
0answers
33 views

How to compare distributions to determine if facilities are in the best location to serve the population? [closed]

I am using ArcGIS 10.3 for this project. I am interested in determining how well (coverage or overlap) testing facilities serve high disease prevalence neighborhoods. I geocoded both the testing ...
1
vote
1answer
55 views

Calculate the overlapping percentage two web feature service poygons

Is it possible to calculate the overlapping percentage of two polygons coming from web feature service? I overlayed two WFS layers in my openlayers map. The two layers have same data but collected at ...
1
vote
1answer
49 views

What is the easiest way to create rings from existing polygons?

I have been given a shapefile from a client that features pivots, yet they were recorded as 10 circles overlapping. The software my company uses requires that these polygons be rings that don't ...
5
votes
1answer
97 views

Dissolve overlapping polygons according to percent overlap using PostGIS?

I have a shapefile with convex hull polygons, all in the same layer/shapefile. Some of the polygons overlap (not duplicate polygons). I would like to dissolve/union the polygons which overlap with ...
2
votes
0answers
36 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 ...
3
votes
1answer
132 views

Count overlapping polygons, including duplicates

I am using ArcMap 10.2.2 (Advanced license, no toolbar add ons/no spatial analyst) on a Windows 7 computer (i7 processor, 8GB RAM). I have used ArcMap for other basic analyses and have only very basic ...
3
votes
1answer
102 views

ArcGIS find all polygons that intersect with more that one polygon from another layer

I have two layers with polygons. I want to find those polygons from first layer that intersect with more that 1 polygon from second layer and find those intersected polygons ID numbers: 1 from first ...
3
votes
1answer
98 views

Counting polygons in one layer that are overlapping/touching/contained in each polygon in separate layer of contiguous polygons using QGIS?

I have a layer of contiguous (pink) polygons (UK Parliamentary constitutencies) and a separate layer containing (blue) polygons representing protected nature areas (Natura 2000 areas): Each ...
1
vote
1answer
104 views

Count the number of polygon features within a polygon

I am using ArcMap 10.2.2 (Advanced license, no toolbar add ons/no spatial analyst) on a Windows 7 computer (i7 processor, 8GB RAM). I have used ArcMap for other basic analyses, but am fairly new to ...
0
votes
0answers
10 views

How to toggle map layers on Hover?

I have a map comprising two Fusion Table layers. What I'd like to do is design the map so that the shapefile defined area changes color on hover based on the scale used in one or the other maps. ...
-3
votes
1answer
97 views

Same coordinate system - shapefiles don't overlap [duplicate]

I have two shapefiles and two rasters (dem), and while I put them in the same coordinate system (Greek grid), it seems that they don't overlap. But one is the boundaries of a county, and another the ...
1
vote
0answers
18 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.
3
votes
2answers
113 views

Extracting Overlapping Parts of Single Polygon Layer using QGIS?

I have a single polygon layer with over 200 buffers with a lot of overlapping areas. I want to use QGIS to create a new layer representing the overlap. I've seen several questions that are similar, ...
2
votes
3answers
148 views

Hiding Overlapping Lines in ArcMap?

I am trying to figure out the best solution to hide overlapping lines. I have a layer of polygons representing crustal plates. I have a polyline layer of fault lines that overlap some of the polygon ...
0
votes
0answers
57 views

mysql query to find area overlap

I have US zipcodes data in a mysql table where each zipcode shape is stored as polygon. From a given point (latitude and longitude) I want to know the zipcodes that overlap within 1 mile radius and %...
4
votes
1answer
93 views

Weighting amount of overlapping polygons in postgis

I have two tables that I join in my existing workflow. One of these includes flood events (was a shapefile that has been imported to PostgreSQL), the other one is a grid that holds the amount of ...
1
vote
1answer
122 views

ArcGIS Spatial Join - “contains part of” match option

I would like to perform a spatial join using a (non-existent) "contains part of" match option. i.e. I want the join to include any and all polygons that overlap, not just touch at the edge. None of ...