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Questions tagged [overlapping-features]

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

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2
votes
0answers
215 views

Summing attribute values for areas where multiple polygons overlap using QGIS? [duplicate]

I am working in QGIS 2.8.1. I have a shapefile of polygons, each of which has a unique ID and a count value that represents a point count within that polygon. Many of the polygons overlap. Where ...
0
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4answers
1k 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 ...
3
votes
2answers
799 views

Linking polygon features in one layer to polygon features in another, using largest overlap in QGIS? [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 ...
6
votes
2answers
1k 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 ...
12
votes
2answers
2k 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
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0answers
366 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
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1answer
324 views

Visualizing overlapping polygons by occurence

I work in a library providing geospatial services and I have a patron with about 60 surveys with perceived accent regions in Mexico. Individuals drew on maps where they think people speak with ...
1
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1answer
2k 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 ...
1
vote
1answer
116 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. ...
1
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2answers
262 views

Selecting/Exporting points from one layer that do not overlap with the points from another layer in Qgis

I am working with QGIS and have the following problem to solve: I have 2 point layers. Layer 1 has more points than Layer 2 but all points of Layer 2 have the same position as Layer 1. I need to find ...
1
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0answers
308 views

Merging rasters which overlap using ArcGIS Desktop? [closed]

I need to merge two rasters which overlap, both indicate distance values. I need the output of the merge to result in the shorter/lower distance value. I am using ArcGIS 10.1. I work for a security ...
2
votes
1answer
241 views

How to represent different colors based on a field with representation rule (ArcMap)?

I've got a single polygon feature class with hierarchy overlapping polygons (one-to-many - "tree"). The hierarchy is varying between 1-4 levels but can edited to be even more leveled in the future. ...
3
votes
1answer
108 views

Extending buffer zone

I am working in ArcMap 10.2 (and Modelbuilder) and I would like to solve the following problem: I have Buffer A (single part) and Buffer B (multipart). I would like to extend Buffer A with Buffer B ...
6
votes
1answer
2k views

Representing overlapping polylines in QGIS

I have several shapefiles representing bus lines with different colors for each segment, however, because the lines are exactly superposed, only the shapefile on top can be seen. Is there a way to ...
2
votes
1answer
2k views

Merging multiple overlapping lines using Python?

I have a shapefile with different line features, some of which overlap. Is there a way to easily merge all overlapping lines into one, new feature using Python? I've seen some solutions for ...
0
votes
1answer
123 views

multiple electrical cable representation in Geodatabase

I have multiple electrical cable going through the same path. Should I draw them all as one single line (with an attribute denoting how many they are)? or multiple lines? if multiple, should I draw ...
5
votes
2answers
1k views

Calculating edge length of polygon within overlapping polygon using ArcGIS Desktop?

I have a layer of wetland polygons and a layer of lakes. I basically want to find the total length of lake shoreline contained within each wetland and add these values as an attribute of the wetlands. ...
1
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0answers
78 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 ...
1
vote
0answers
125 views

Count Overlapping Lines using ArcGIS Desktop? [duplicate]

I'm trying to calculate the frequency of overlapping lines. The question is pretty identical to the illustration show here Frequency of partially or fully overlapping lines However I have no python ...
2
votes
1answer
283 views

Sdo_Geom.Sdo_Intersection is not considering overlapping vertices

I'm using below package to get the number of intersecting vertices Sdo_Util.Getnumvertices(Sdo_Geom.Sdo_Intersection(B.Geom,R.Geom,.00000000005)) It is returning only 1 when there are actually 15 ...
4
votes
1answer
2k views

postgis: cluster/group points based on distance

We have a set of thousands of points and want to group all of those which are within 100m distance from each other (to get the centroid from each group). A first idea was to build 100m buffers around ...
12
votes
1answer
18k views

Removing overlapping/duplicate polygons in same layer using QGIS?

I am working in QGIS on a vector layer where areas are classified using an attribute "typo". The problem I'm encountering is that many polygons are duplicated or overlapping, with the result that some ...
6
votes
1answer
3k views

How to clip a single layer of overlapping polygons in QGIS

I have a single layer of polygons. Some of the polygons overlap. I wish to make a new layer of just the parts of the polygons that overlap. What is the best way to do this in QGIS seeing it's all in ...
1
vote
2answers
594 views

Adding Nodes to Linestrings at Overlapping Points with Polygon Layer in Spatialite

I have two Spatialite tables. A table called 'lines' which contains a PK column called OGC_FID and a LINESTRING column called GEOM. A table called polys which contains a PK column called OGC_FID and ...
2
votes
1answer
151 views

Count Number of Times 100 Feature Classes Overlap

This must have been asked before, but I can't find the exact answer and my attempts so far have not worked. Most of the overlap questions I see are for calculating the area of overlap for portions of ...
2
votes
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 ...
1
vote
2answers
675 views

Symbolising multiple lines in the same location

I would like to produce maps showing multiple lines that are in the same location. This poses the problem that the lines overlap each other making one of multiple lines visible when displayed in a ...
2
votes
2answers
387 views

Fire frequency Map in ArcGIS for Desktop?

I would like to create a fire frequency map in ArcGIS showing the areas which have burnt 1, 2, 3 times etc (overlapping areas). Currently I have years from 2000 to 2014 of burnt area MODIS data which ...
1
vote
3answers
399 views

Why dissolve creates many extra features?

I have a shp file in Arcmap 10 that has ~16600 polygons. Some overlap. I want any polygons that are overlapping to be dissolved into single polygons. I want non-overlapping polygons to remain the same....
2
votes
2answers
345 views

Finding outermost border of set of geomertries (circles) using PostGIS?

I have a (large) set of geometries (circles) that overlap.! I would like to find the nearest location outside of this group from my current location. In this example my location is the black dot. In ...
2
votes
3answers
912 views

Highlighting number of overlayed lines in ArcMap?

Using ArcMap 10.2, I have a feature class composed of several lines representing bus routes for the same transit line. There are different routes according to schedules. In the image below, each route ...
0
votes
1answer
473 views

CartoDB - Multipolygon not showing intersections

I'm having an issue with Multipolygons on CartoDB. I have a very simple scenario: A multi polygon row on a table that needs to be displayed on the map. Fact is that when more than two polygons ...
4
votes
1answer
56 views

Labelling Max coverage by Area

I'm struggling to find a quick way to identify and label an area by the maximum coverage of an overlapping polygon. Has anyone done a process like this lately? I'm currently playing with the Pivot ...
1
vote
3answers
184 views

a map for the number of overlapping polygons

I have a geodatabase with a given number of polygon features. I would like to generate a layer (V) that displays the number of overlapping polygons at any given (x,y) location spanned by my polygons. ...
3
votes
1answer
2k views

Calculating area of polygon inside region?

I am new to geographic information systems and i need to calculate the area of a a polygon ( a circle to be precise) that falls inside the boundaries of a region, say a state or a country. For example,...
1
vote
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 ...
2
votes
0answers
601 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 ...
9
votes
2answers
13k views

Identifying overlapping polygons in single layer using QGIS?

I have a shapefile of buffered points in QGIS. I need to display all buffer polygons in this layer which overlap. I have experimented with the intersect tool, but this only seems to work if I am ...
10
votes
5answers
9k views

Counting overlapping polygons from one Shapefile using ArcGIS Desktop?

I have a shapefile with 16,400 polygons. Each polygon shows the expansion of a bird species for the whole world. Now I have to count the overlapping polygons. I tried it with union and dissolve (...
1
vote
0answers
130 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 ...
5
votes
1answer
4k views

Count overlapping polygons in single shapefile with R

I have a shapefile of species ranges for ~ 346 species. Some species have multiple polygon ranges so there are 1,078 polygons and many polygons are multi-part. It looks something like this: I would ...
3
votes
1answer
65 views

How many A features that fall both in the B polygons and C polygons are for each C polygon?

I have this apparently complex problem for solving in ArcGIS: Practically, I need to get the number of all yellow polygons that fall within both the green polygons and the red polygons. I need this ...
2
votes
0answers
52 views

Splitting overlapping points with same symbology in ArcGIS for Desktop? [duplicate]

I'm using a basic license of ArcGIS 10.2.2 for Desktop. I have a point feature class layer and I uploaded it twice for representing two features. First is a type of person and second is the ...
1
vote
0answers
111 views

Identifying certain polygon from overlapping set [closed]

To clean up a large shapefile, I am looking for a way to do the following: I have the ID of many polygons which need getting rid of stored in a list. These polygons are villages and a second ...
6
votes
1answer
3k views

How to merge overlapping and duplicate lines from vector layer to one single line?

I used the "polygon to line" tool from QGIS, to get a line-layer from this polygon-layer: Unfortunately this causes overlapping and duplicate lines, after I broke the qgis-export via GRASS into ...
3
votes
4answers
2k views

Summarize the total area of land use polygons within map sheets - how?

I would imagine that at least some of you have encountered similar problems to mine and I´d like to hear how you solved them. I have a map sheet index (a grid as a shape file) covering a large area. ...
1
vote
2answers
321 views

Network Analyst resolved route can't display properly on printed map [duplicate]

I have looked on the Internet but there are no updated answers. I am using ArcMap 10.2. I am trying to print the route resolved by network analyst but there is no way I can display overlapped ...
6
votes
2answers
3k views

Zonal statistics for millions of overlapping polygons in ArcPy?

I am running ArcGIS 10.1 with 64-bit GP on Windows 8.1 x64. I want to calculate the zonal statistics of buffer polygons based on parcels and a kernel density raster. The 4.7 million polygons overlap ...
7
votes
2answers
18k views

Find overlapping polylines in same layer in ArcMap?

How can I find overlapping polyline features in a layer in ArcMap without writing any code? I have a PolyLine feature class in a personal geodatabase. It contains some features that overlap another ...
1
vote
0answers
971 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 ...