Questions tagged [adjacency]

Spatial relationship where two features share a common border under some interpretation - ie, are 'next to' each other.

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Style rule based on feature adjacency?

Is there a way in QGIS to use an expression to define a polygon feature's color based on whether it's adjacent to other features? I would like to achieve something like the following: -If a feature ...
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208 views

Creating Adjacency Matrix using SpatialLinesDataFrame and SpatialPointsDataFrame in R?

I am trying to create an adjacency matrix of power plants that are connected via power lines. The plant data is point data (~8000 observations) with longitude and latitude measurements. The line data ...
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Adjacency matrix for polygons using Java

I am trying to create an adjacency matrix from a set of polygons. That is, I have a bunch of polygons and I want to identify which polygons have a common edge or "touch" each other. Once I find this ...
2
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Postgis List of adjacent LineStrings ordered sequentially from one end of the MultiLineString to the other

I have LineStrings that represent a road network/address centerline that are segmented at intersections, etc. I have determined how to query collections of LineStrings that are adjacent to each other ...
2
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0answers
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Specifying polygon face toward two different lines using ArcMap?

I have a parcel layer, a street of city layer, and I want to find the parcels at the corner of two different streets (meaning a house with two faces toward 2 streets). I am using ArcMap. I want ...
1
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Adding attributes from surrounding feature (exclave problem)?

Here is the problem: I am creating polygons based on the result of closest facility tool in Arcmap. Polygons consist of municipalities with the same closest hospital (impedance is a travel time, not ...
1
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0answers
31 views

Converting polygon to line with neighbor info using QGIS?

Is it possible to create lines from polygons with information about neighbors in QGIS? I would like to do this for land plots. There is a tool in ArcMap that works like a charm, but I do not see ...
1
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102 views

Directions based on polygon centroid and average/median point of adjacent polygon's touching border

I have a layer containing multiple polygons, and I am trying to find a way to identify the directions of the adjacent polygons of a certain polygon. The directions would be based on the main polygon ...
0
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1answer
18 views

Computing area of shared surface between adjacent 3D features in ArcGIS Pro?

ArcGIS Pro currently provides the Polygon Neighbors tool to compute the length of the shared border between features. I want to do the same type of calculation for (closed) 3D features, i.e. I want ...
0
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0answers
65 views

Calculate Adjacent Fields Issues

I am trying to run the Calculate Adjacent Fields ToolBox on one of my Shapefiles, but the process is taking hours to run, and I have yet to complete the process. My table is 18,000 rows, and so far ...