Partitioning data points into subsets of objects according to their mutual "similarity," without using preexisting knowledge such as class labels.

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0
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0answers
12 views

DBSCAN for spatial clustering based on X, Y and additional variables [on hold]

Please you can provide a information about DBSCAN. I am trying to implement a spatial clustering for enterprises based on location and activity code (NACE). About the "# import your point data" step ...
5
votes
1answer
100 views

Algorithm for spatial clustering?

I have a series of 2D maps with values ranging 0.0 to 1.0 spread all over. The algorithm that produces them is an application of the fractional Brownian motion. Each map measures 101x101 pixels or ...
0
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1answer
508 views

Updating cluster distance in OpenLayers 3?

I have a vector layer with clustering in OL3.4: cluster = new ol.layer.Vector({ source: new ol.source.Cluster({ distance: 20, source: some_geojson }), ...
1
vote
1answer
58 views

From a lat/lng point, load data clusters of other lat/lng points within radius using PostGIS

Very similar to how Zillow's mobile app mapping search works, I'm trying to pass in the lat/lng points & radius (meters) of a single user and then, on the fly, generate clusters to enable passing ...
0
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1answer
268 views

How to I cluster by features in CartoDB?

I have a set of points for a number of buildings in NYC. I would like to group those points into clusters per their respective neighborhood (ex: Chelsea, Upper East Side etc.). Each of my points have ...
0
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1answer
283 views

Create certain number of Clusters, equal sum of Z value

Divide polygons into *n* number of groups of equal counts with ArcGIS 10.2 is very similar to my question. But instead of equal number of polygons, I have multiple points (schools) with a z value (...
2
votes
0answers
35 views

Using ArcGIS for clustering and correlating large datasets

I have a large amount of historical lightning strike data (with lat, lon and timestamp) and am trying to separate out isolated events, which aren't part of larger clusters found in thunderstorms (i.e. ...
22
votes
7answers
2k views

Seeking tools for regionalization/redistricting?

I am looking for tools for regionalization / districting in GIS. So far I have been able to identify Districting ArcGIS extension (now also online) REDCAP (currently limited to 50k input polygons) ...
3
votes
1answer
354 views

Cluster Markers with CartoDB

Is there an easy generic way to cluster Markers with CartoDB?
2
votes
2answers
198 views

Simplify GeoJSON by retaining external boundaries (clustering)

I created a website (http://www.cartescolaire.paris) that basically loads a GeoJSON and displays it on a map using Leaflet. This geoJSON is pretty large (over 2 Mb), the loading time can be very long ...
0
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0answers
16 views

Clustering across layers

I know how to create clustering inside one layer. It works fine. But is there any way to create clustering across different layers that e.g. points from different layers be not one on each other? ...
1
vote
1answer
208 views

SAGA Cluster Analysis for grids projection issue

I am having an issue with the SAGA cluster analysis for grids tool within QGIS 2.4. I am actually taking this as an online class through Del Mar and we are going over supervised and unsupervised ...
0
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0answers
9 views

ArcGIS Simply polyline cluster

I am using ArcGIS 10.1 and I would like to compute a cluster of polylines to generalized single lines. The aim is to have in a small map scale showing simple polyline going almost in the same ...
2
votes
1answer
73 views

Clustering (ConvexHull) data based on distance

First I would like to mention that I am not an expert with PostGreSQL so my question may seem dumb, but here it goes: I have a database with over 800 000 points associated to a geometry (EPSG 2950) ...
3
votes
0answers
39 views

How to examine each connected pixel to select its neighbors to separate clusters?

I am trying to develop a methodology for separating pixels from one another to determine whether they belong to a city cluster or not. Starting at the center pixel of the city I want to select all ...
1
vote
1answer
48 views

Is it possible to cluster polygons in Leaflet?

Is it possible to cluster polygons in Leaflet? In a similar way to the Marker Cluster plugin
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0answers
24 views

arcgis create heatmap of line features [duplicate]

I have very little GIS knowledge as a math/cs student. i'm doing a project that requires me to find which pieces of highway are the most frequented based off my information. I want this displayed in ...
0
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0answers
29 views

How import variable from leaflet.markercluster

Maybe someone can help me... How i can import variable from leaflet.markercluster if i using webpack. I can't find class, which i can import. https://github.com/SINTEF-9012/PruneCluster
27
votes
6answers
7k views

Creating polyline-based “heatmap” from GPS tracks?

This winter I am planning to track my downhill skiing/snowboarding using a GPS. Most of my riding will occur at the same resort. I would like to be able to create a sort of "heatmap" that shows the ...
1
vote
1answer
45 views

Weird behavior with st_clusterwithin

I'm not sure I'm doing this right, I've two locations, one a point and one a point within an area. I'm running them through st_clusterwithin, and they both create 2 individual cluster groups (which is ...
1
vote
2answers
79 views

DBSCAN spatial clustering in R

I have file with coordinates X, Y of point objects in EPSG3301 coordinate system (that means it is in meters). I want to spatially cluster points. Here is my R code (dbscan package): db2 <-dbscan(...
0
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0answers
16 views

Creating clusters based on nearest distance attribute in ArcMap using ModelBuilder

I am attempting to create a tool via modelbuilder that creates clustering for a polygon feature class based on the distance field attribute (between one polygon to another) that I have created using ...
0
votes
1answer
122 views

Clustering of Spatial Data in R or Python [closed]

I am new to GIS. Problem Domain :- I have a stoppage data of different vehicle i.e. the point where vehicle stopped.There are some specific vehicle which stops at some particular point. So, I am ...
0
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0answers
19 views

GeoServer Active Clustering Extension

I'm trying to install GeoServer Active Clustering Extension as in the http://geoserver.geo-solutions.it/edu/en/clustering/geoserver/active/installation.html . After dropping the jms-cluster-plugin ...
1
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0answers
17 views

Create a correlation between different point dataset

I have different point data-sets in my map in ArcMap, but I am wondering if there is an tool in ArcMap that can analyze the correlation between the different data-sets. Specifically, I need to know ...
3
votes
2answers
156 views

Clustering geographical data based on point location and associated point values

Given data points with longitude, latitude, and a third property value of this point. How can I cluster points into groups (geographical sub-regions) based on the property value? I searched by google ...
1
vote
1answer
45 views

What needs to be installed, to use ST_ClusterDBSCAN?

I have working PostgreSQL 9.5.3 with PostGIS. I have sucessfully created table and column with geom data type. I am able to execute geometry queries, namley ST_Transform without problem. # SELECT ...
0
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0answers
25 views

How to define a study area for Ripley's K analysis?

I have a spatial point pattern which spans across multiple districts in the country. Now I want to examine its pattern using Ripley's L function. I know that Ripley's L function is used for ...
1
vote
0answers
21 views

Group location points that have a cumulative value 2000

I have a set of 400 locations (points) joined to a table having population attributes. I want to form groups of nearby locations such that the cumulative population is 2000, group can have maximum 15 ...
0
votes
0answers
22 views

locate sample geo trace data

I'm working on a project where I need to form clusters of GPS coordinates that are separate from noisy geo-data points. I am using DBSCAN/OPTICS XI algorithms in R on randomly generated test data, but ...
1
vote
0answers
19 views

cluster analysis dependent on avaliable area

I want to perform a cluster analysis based on a "background polygon". The polygon is not continuous, it represents coral colonies within a 10x10m reef area. Points represent disease locations on ...
10
votes
1answer
290 views

Birch algorithm does not cluster as expected

I'm using Birch algorithm from scipy-learn Python package for clustering a set of points in one small city in sets of 10. I use following code: no = len(list_of_points)/10 brc = Birch(...
1
vote
1answer
88 views

Clustering markers using quadtree

I have a POSTGIS database with geography points and i want to cluster the points using quad-tree . I have a map where i have to display the markers clustered or non clustered depending on the zoom ...
2
votes
1answer
4k views

How to get Openlayers cluster strategy work for large data?

The map Layer has around 1500 points. I am able to display all the points in the map without any problem but adding the cluster strategy to the layer does not work. The Cluster strategy functions when ...
4
votes
1answer
462 views

How to cluster points into clusters of a maximum diameter in PostGIS?

I'm working with transit stops in GTFS. I want to group together stops (N~8000 for a medium sized agency in the USA) which are proximately related in order to reduce the number of dimensions but also ...
2
votes
0answers
58 views

How to cluster point data into equal sized groups [closed]

I need to cluster point data into equal sized groups. I have 180 points and want to create 3 groups each containing 60 points. The groups should contain points which are close to each other. Is there ...
0
votes
2answers
143 views

How to display geotagged photos in leaflet

There is awsome plugin of displaying geotagged photos in leaflet Photos on leaflet I used the picasa photos implimentation when I implemented the plugin for my picasa public album photos link in ...
5
votes
0answers
128 views

Finding density centroids within polygons in PostGIS

I want to find the highest density of OpenStreetMap nodes within a dataset of census geometries. I want to tie the census data to the location of the node which is most central in terms of population. ...
0
votes
1answer
92 views

How to highlight leaflet marker cluster on mouse over?

Is there a way to highlight a leaflet marker cluster when mouse over as you can do for a simple marker? // ADD YOUR BASE TILES var baseLayer = L.tileLayer('https://dnv9my2eseobd.cloudfront.net/v3/...
1
vote
1answer
112 views

How to create a heatmap with numbers using Leaflet map?

I wish to create a heatmap like this one at http://www.trulia.com/local/san-francisco-ca/tiles:1|points:1_crime With the number changes at different zoom level - the number can appear in a mouse-...
0
votes
0answers
36 views

Clustering points in Lizmap?

I am testing Lizmap on a project where I display a high density of points from a point layer. Anyone knows a way to cluster the points in lizmap or qgis server? The idea is to end up with some ...
16
votes
6answers
16k views

How to Create Animated Cluster Markers in OpenLayers/Leaflet?

I want to use Leaflet due to the smooth transitions which Openlayers seems like they can't match. I specifically require the ability to cluster markers with custom styled marker groups. The best ...
1
vote
1answer
61 views

Using FME to aggregate POI to one point

I want to aggregate points of interest (POI) using FME. The aggregation should make it possible to group all POI within an area based on a buffer distance from the centerpoint of n POI. This would ...
7
votes
2answers
154 views

creating clusters of points with same attributes

I have a file of some 4000 points, which belong to around 400 different categories (species of rare plants). I would like to remove duplicates within the categories (which could be repeated ...
0
votes
2answers
330 views

iterate over cluster in markerCluster : leaflet

i need to iterate over all clusters that are currently present in markercluster using leaflet. there's a method called markercluster.getClusters() in googlemaps to do this job. is there something ...
2
votes
1answer
453 views

Spatial clustering with PostGIS including attributes

Spatial clustering with PostGIS including attributes I have a points table with some attributes like : year, type, etc. And I'd like to do a points clustering in PostGIS. I followed the subject in ...
22
votes
6answers
15k views

How to cluster spatial data in R?

I am very new to R. I have bunch of data points with latitude and longitude. I want to use R to cluster them based on their distance. I have already taken a look at this page and tried clustTool ...
1
vote
1answer
202 views

PostGIS Clustering. Group by geographic point location proximity

I have a table where i keep user's location history. The system gets user's current location each minute and writes it into "user_locations" table. Later on; when showing the locations that the user ...
0
votes
1answer
33 views

Cannot Add Machine to ArcGIS Server Cluster

After almost year of success, SQL database failed to register in ArcGIS Server. Traced problem to secondary/failover server in cluster. Deleted secondary server from cluster and database now ...
1
vote
0answers
80 views

ESRI Cluster layer dynamic label colors

I am using extras/clusterlayer to render clusters for a uniquevalue renderer.. all that works well and good except that the label colors are all white/black/whatever you set them to.. I though I'd ...