Questions tagged [spatial-cluster]

Use this tag when referring to spatial clustering in GIS.

24 questions with no upvoted or accepted answers
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How to choose limited number of points to represent a point grid

I need to choose a few points to represent the grid below, e.g: 8 points in the grid below. This point need to be geographic distributed This points needs to be geographic distributed. Lets see a bad ...
4
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0answers
212 views

Find number of weighted point clusters & centre of clusters

I have a points layer with a frequency field indicating a population at that point. There is also a field indicating the broader area by which I need to analysis broken down into. I am expecting the ...
4
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0answers
2k views

Clustering of events within a space-time window (R)

I am relatively new to clustering methods and am trying to determine the best method for clustering (or merely grouping) events that fall within a space-time window using preferably R. My goal is to ...
3
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0answers
73 views

Clustering based on eqaul populations

I have a map of a city that is divided into 65 sectors (building lots in purple, sector boundaries in red): In my shapefile of building lots, I have an attribute that is the total population within ...
3
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0answers
784 views

PostGIS - Dynamic Server-Side Clustering based on Zoom level

I'm working on a Ruby on Rails application that is showing road signs on the map(leaflet). So, user can browse map and road signs, great. But, if there are a lot of signs and user wants to zoom out, ...
2
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0answers
42 views

How to cluster interconnected lines in Python without PostGIS?

I'm working with a subset of data from OpenStreetMap, where I have these island-like groups of line features. The groups are not connected to one another, but the lines are all interconnected within ...
2
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0answers
150 views

GIS Clustering with drawing predefined square area around points as cluster boundaries

I have a layer of points and I would like to create clusters where a predefined square area of 5km by 5km is the boundary for the cluster. Is there a way to iteratively draw square polygons around ...
2
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0answers
3k views

Clustering latitude longitude data based on distance

I have a large dataset of latitude and longitude. I want to cluster the data into groups based on distance such that the distance between two points in a cluster is not greater than a minimum ...
1
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0answers
17 views

Group PostGIS table-rows where geometries are close

In OSM there are often e.g. lines (paths) with the same name but different OSM-IDs. Right next to each other, so basically the same thing, but just different objects with no real relation to each ...
1
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0answers
92 views

DBSCAN with huge number of points

We have a dataset of approximately 30 million new points per month (latitude, longitude, and a measurement associated with that point). So far, we have applied DBSCAN to generate a monthly map such ...
1
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0answers
112 views

Defining Parameters using Spatially Constrained Multivariate Clustering of ArcGIS Pro

I have a point shapefile with 51673 features. I am trying to cluster them using the Spatially Constrained Multivariate Clustering tool in ArcGIS Pro. After reading through the documentation, I'm ...
1
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0answers
308 views

Is there an equivalent to “Build Balanced Zones” from ArcGIS Pro in QGIS?

"Build Balances Zones" was introduced in ArcGIS Pro 2.4 and allows a kind of spatial clustering with the help of genetic growth algorithm: The Build Balanced Zones tool uses a genetic algorithm to ...
1
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0answers
191 views

Cluster LineStrings using HDBSCAN?

I am trying to cluster a set of LineStrings (made out of lat/lon Points) with the help of HDBSCAN (using the "haversine" metric). The objective is to define the most "usual" path. I have only managed ...
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0answers
51 views

Find cluster of points within a 14K dataset which are laying within a circle of a certain radius

I have a dataset of geolocated points, which are dispersed over a large area I need to find clusters of a minimum number of X points within these sets which are laying within a circle of which the ...
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0answers
18 views

Clustering adjacent polygons with values over a given threshold with Python

I have a GeoPandas dataframe that looks like the following geometry raster_val 0 POLYGON ((1.85626 49.12003, 1.85626 49.11171, ... 28.530001 1 ...
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0answers
17 views

Creating polygons based on attributes in point layer using ArcMap

I have a point layer of residential coordinates which includes an attribute field indicating the most visited hospital for the people living at the coordinate. From these data, I want to create a ...
0
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0answers
23 views

Why modified feature resets it's position on zoom in/out in Open Layers 6

I have used select and modify interactions with OpenLayers 6, used feature option for modification. These works fine but face an issue with modify interaction. When I change the position of a feature ...
0
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0answers
21 views

If there is no spatial autocorrelation, should the spatial cluster detection be performed?

I have a regional count data of disease incidence. First, I calculated empirical Bayes estimate of standardized morbidity rate. Then I performed global Moran's I to check for spatial autocorrelation ...
0
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0answers
22 views

Assigning features to spatial clusters created by Oracle SDO_SAM.SPATIAL_CLUSTERS

SDO_SAM.SPATIAL_CLUSTERS creates spatial clusters - how to detect which feature was assigned to which cluster? Is the only way to perform an additional spatial join between cluster geometries and ...
0
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0answers
70 views

Distance computation for geospatial clustering of lat/lon points

I am working with a pretty large dataset (~500K data points) in Python (GeoPandas) and I would like to perform geospatial clustering on some subsets (~60K points) of the data. My question has to do ...
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0answers
26 views

How to evaluate the statistic significance in the Neighbour Nearest Test?

I'm reviewing a scientific article to be publish. I tried to evidence that pathogens collected from different geographic areas clustered. I used Nearest Neighbour test to prove it. However, I've ...
0
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0answers
48 views

Point patterns clustering around reference points?

I have two point shapefiles. I want to analyse whether the points in the dataset A are clustering around their respective reference point in the dataset B. Each reference point in the dataset B has a ...
0
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1answer
97 views

Point Similarity Clustering

I am new to geographical statistics so please pardon this question if it is a duplicate. I would like to test if points that are similar are more or less likely to be near each other. I am latitude ...
0
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0answers
252 views

Is Spatial clustering with PostGIS possible to generate N number of groups that have 10 elements?

I need to create a query using some sort of spatial clustering algorithm within PostGIS database. Currently, I am using pgAdmin version 4. More specifically, I need to create N number of groups that ...