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

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2
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0answers
22 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
79 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
37 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
62 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
59 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
9 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
34 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
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0answers
17 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
71 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, ...
1
vote
3answers
72 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
28 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
55 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
65 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
67 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 ...
5
votes
3answers
220 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
28 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
45 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
103 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
268 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
35 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
40 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
35 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
94 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.
1
vote
2answers
103 views

Overlapping polygons and features and how to dissolve

I am new to GIS area and also new to any software that can modify the GIS. I am currently working with South Australia map I have download from Australian census site. I am using QGIS to load the ...
-3
votes
1answer
61 views

How to determine how many times an area was burnt? [duplicate]

In arcgis I want to find from various forests fires shp files how many times parts of a particular forest were burnt during the last 70 years. Is there a way to count overlapping polygons?
2
votes
2answers
189 views

How to fix overlapping polygons using ArcGIS for Desktop?

I'm using ArcMap 10.3. I have a layer of different land use types. After calculating the percentage of each land use in the catchment using tabulate intersection, I found out that the percentage of ...
1
vote
1answer
97 views

How to calculate overlap area of two polygons?

I am a beginner in the world of GIS. I have one table polygons with each polygon having north-east and south-west coordinates. And for every polygon, I need to find area of overlap with other ...
1
vote
1answer
80 views

How to properly draw and label overlapping polygons?

I would like to show overlapping polygons on a single layer. The polygons are coloured based on a property and labelled according to another property. The problem is then twofold: The polygons are ...
2
votes
0answers
43 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 ...
1
vote
1answer
129 views

counting overlapping polygons - ST_Union very slow, how to make it more efficient?

I have a set of 1000 polygons that overlap and I want to count the areas of overlap. I am using this blog post's instructions to create multilines from the 1000 polygons then use this line file to ...
0
votes
0answers
40 views

Polygons Present in another Polygon (Selection/Attribute Transfer)

I have 2 layers, Sugar Data and Surveyed Parcels. My interest is to include 2 new fields in the sugar data (lot & plan) which is present in the surveyed parcels data. Im using Arc Map 10, can ...
2
votes
1answer
129 views

Difference between intersect {raster} and gIntersection {rgeos} in polygons - R?

I am interested in knowing the difference between tools: intersect {raster} and gIntersection {rgeos}** tools in R. I have several overlapping polygons and I am interested in their overlap, but mostly ...
3
votes
1answer
117 views

Loop to check multiple polygons overlap in r

I have a set of polygons (available here: http://ulozto.cz/x39ELbFt/polygons-zip) created in QGis and processed in R. I would like to know if they are overlapping or not, and if yes, where is the ...
1
vote
1answer
121 views

Assign overlapping polygons based on attribute

I am using ArcGIS 10.1 and have a polygon shapefile with 16000 records. There are many polygons that are overlapping and my goal is to determine the overlap portions fix the problem, so that there ...
2
votes
2answers
177 views

Trouble using ST_Difference to remove overlapping features

I am trying to use ST_Difference to create a set of polygons (processing.trimmedparcelsnew) that do not contain any of the area covered by another set of polygons (test.single_geometry_1) using ...
1
vote
1answer
55 views

In PostGIS: How to delete completely overlapping polygons?

I would like to eliminate overlapping polygons from a table that is often updated with new polygons, but only if a certain attribute has a higher value. If this higher-priority polygon only partly ...
1
vote
2answers
168 views

Displaying Buffer overlap in ArcGIS Pro with Intersect

I have created some buffers around some points in ArcGIS Pro, and I am wanting to recognize the area of the buffers that overlap with another buffer within the same layer with a different color. How ...
1
vote
2answers
97 views

Add overlapping polygons

I have a feature class that contain many overlapping polygons. Each polygon has a field value which I would like to add together wherever the polygons overlap. There are about 100 polygons each with ...
1
vote
1answer
71 views

editor clip with multiple selected features

I have a layer where the creator drew overlapping polygons instead of clipping or cutting them out, (30,000) polys and 10,000 overlapping after topology was run. I do not want to manually fix one at a ...
1
vote
1answer
88 views

How to merge two lines of polygons?

In QGIS 2.6.1, I have merged two polygon shapefiles. After the merge I am facing a problem at boundaries. So I thought of changing Polygon -> lines, manually deleting one of the lines at the ...
1
vote
1answer
322 views

How to select polygon features that intersect a line feature using pyqgis?

Is there an easy way to select all features in a polygon layer that intersect (overlap) a line feature? I need to implement this in python using QGIS, thus pyqgis. This code illustrates what I am ...
4
votes
2answers
252 views

Fastest way to numerate intersecting polygons in ArcGIS

I need to numerate a thousands of polygons in groups, so each group will get unique number. Every intersecting polygons is unique group (see picture). So polygons have field "groups" with values: ...
0
votes
4answers
275 views

How to Remove Multiple Labels for Stacked Points? ArcGIS 10.2.2?

I have a point feature class, in certain areas there are stacked points. These stacked points are accurate. However, when I label the points I am getting a label for each point, which is okay for each ...
0
votes
0answers
159 views

Checking for overlaps using python

Trying to write a code where python checks for overlapping polygons within a file geodatabase in the current mxd and basically prints the feature class names overlapping. Here is what i have: import ...
2
votes
2answers
102 views

How to link polygon features in one layer to polygon features in another, using largest overlap in QGIS or GRASS [duplicate]

I have two polygon layers: the first one contains small land lots (green in the image), the second one contains large zones (the purple line in the image attached separates 2 such zones). I want to ...
0
votes
1answer
100 views

How to eliminate polygon overlap areas in QGIS?

Is there a way to remove polygon overlaps within the same layer using QGIS, preferably removing the overlap area of the biggest polygon (having the greatest surface)? All of my polygons are in the ...
11
votes
2answers
313 views

Point overplotting on maps in R (e.g. with ggplot2) - how to push points to the side, mark original positions, combine close-by points …?

I've got a database containing languages, their longitudes and latitudes and a feature value (either category 1, category 2 or both - in the plot these are marked red, blue and green respectively). ...
2
votes
0answers
86 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. ...
1
vote
1answer
152 views

Clipping with multiple overlapping polygons while maintaining unique IDs and overlap

I’ve got a series of square overlapping polygons. I want to clip a layer based on these polygons and maintain the unique ID and overlap of the polys. As it is now, if I do a clip using overlapping ...
0
votes
2answers
57 views

How can I find internal overlaps in my polygon feature class ideally via modelbuilder tools?

I have a polygon layer containing "depth curves" for the making of a skin of earth kind of map. I want to check whether or not my feature class contain any overlaps internally between these polygons. ...