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

learn more… | top users | synonyms

0
votes
1answer
20 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
14 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
vote
0answers
24 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
48 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
117 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
1answer
65 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
18 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
votes
4answers
88 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
28 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
113 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
vote
0answers
22 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
108 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
64 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 ...
5
votes
1answer
165 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 ...
1
vote
1answer
33 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
32 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
69 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
117 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
35 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
59 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
32 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
47 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
95 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
32 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
118 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
85 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
87 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
91 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
81 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
108 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
139 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
48 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
83 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
113 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 ...
1
vote
1answer
107 views

How to select overlapping/non-overlapping polygons from a single shapfile in QGIS?

I have a shapefile with a series of polygons, some of which intersect each other and some that don't. I want to select only those that do not overlap with any other polygon. I've tried the Select by ...
18
votes
8answers
555 views

How to fix thousands of small overlapping polygons?

I'm using ArcMap 10.3. I have a layer of different land use types. I found out that many polygons overlap each other and as a result the same polygon have two different land use types. Thanks to ...
0
votes
1answer
32 views

Is it possible to intersect categories within shapefile using ArcGIS for Desktop?

I have a shapefile composed of fire scar polygons identifiable as unique categories based on year of fire. I am interested in measuring the area of overlapping fire scars from different years. Is ...
0
votes
1answer
66 views

How to overlap a base map with a png map (format .pgn) on QGIS-Pisa?

How can I overlap a relief base map taken from maps-for-free.com and this png-formated map so that I can get a resulting map with relief of the 1st map and boundaries of the 2nd map ?? I'm a ...
1
vote
4answers
123 views

Removing overlapping points using ArcGIS for Desktop?

I am using ArcGIS for Desktop and I have a layer that visually appears to have 50 points. However, the attribute table shows 450 rows, indicating that many points are overlapping. I would like to show ...
6
votes
2answers
387 views

Clipping vs Intersecting

I was curious why clipping shapefiles was just so difficult and whether it was different to intersecting shapefiles? You will see from one my questions that I gave up trying to clip a polyline with a ...
0
votes
0answers
37 views

Calculating % of Vegetation type burned by 0/1/2/3…fires in ArcGIS?

I am trying to plot the proportion of each of the major vegetation formations burnt by 1,2,3,4,5,6,7 etc fires (that is a frequency histogram of % of total area of that vegetation formation (e.g. ...
1
vote
2answers
57 views

How to overlay subset of one data set onto another

I have two data sets: one for Thurston County, Washington and one for all of Washington state. I created a map of hydrology features in Thurston County, and now I want to take the data from the ...
1
vote
1answer
41 views

Obtaining areas from overlapping polygons

Using ArcView 9. I have a data set of about ten thousand parcel polygons and a similar number of driveway polygons extending from a roadway polygon into the parcel polygons. My ultimate goal is to get ...
2
votes
2answers
119 views

Identifying number of overlapping polygons in QGIS?

i'm looking for a possibility in QGIS to identify the intersecting parts in one single polygon layer with ten features, where at least four polygons overlap.