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

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2answers
36 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 ...
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0answers
21 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
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0answers
18 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 ...
1
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0answers
13 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
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0answers
18 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
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1answer
227 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 = ...
1
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1answer
52 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
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0answers
41 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 ...
5
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0answers
98 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
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1answer
48 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 = ...
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0answers
27 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 ...
1
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1answer
62 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 ...
1
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1answer
38 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
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2answers
91 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 ...
2
votes
1answer
291 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 ...
1
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0answers
66 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 ...
2
votes
2answers
117 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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1answer
28 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 ...
6
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1answer
87 views

Categorising Point Clusters

I have a point dataset of solar farm locations. The points are grouped according to which substation they feed into (see below). I would like to test the hypothesis that electrical output ...
1
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0answers
38 views

How can I find define regions with a certain size with a polygon layer as input?

I'm working with ArcGIS 10.3 and have a project where I'm trying to define how may breeding habitats of a species that can fit into a specified area. I have a polygon layer with suitable habitat in ...
2
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1answer
39 views

Plotting points conditionally using cluster number in qgis

I have a set of locations such that there are partitioned into five clusters, I used the categorized property under styles to differentiate points belonging to different clusters using different ...
0
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0answers
66 views

Geohash vs. Open Location Code

The target is to find all POIs within a given location on a specific zoom level. If the zoom level is high, I just want to get a number of POIs and at a certain zoom level I want to get all POIs. ...
5
votes
0answers
57 views

Mapping methodology and/or clustering technique needed

I have a scenario in which I have two service centers (A & B) in an area. The capacity of these service centers are different. Service Center A can serve twice as many as Service Center B. They ...
6
votes
2answers
191 views

How can I cluster all points in a postgis table together based on their distance from each other?

I have a PostGIS (in postgres 9.3) table which has Points. I want to figure out the "clusters" in the data. If 2 points are < X distance apart, they should be added to a cluster, and this should be ...
2
votes
0answers
31 views

Performing Grouping Analysis in QGIS? [duplicate]

Is there a QGIS tool that does the function of http://pro.arcgis.com/en/pro-app/tool-reference/spatial-statistics/grouping-analysis.htm MY NEED - I have about 15,000 points. I need them clustered in ...
0
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2answers
108 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 ...
1
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1answer
91 views

How to Group or Cluster Points that are within 45 miles of each other? in ArcGIS?

I have a project in ArcGIS (ArcMap 10.2) where I want to identify naturally occurring dense spots of points and then form groups in that dense area, where points are within 45 miles of each other. ...
1
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1answer
96 views

why doesn't show feature on map

this is fiddle Link.Feature doesn't show on map when it has been like this code : var featureVectorLayer = new ol.layer.Vector({ source: featureClusterSource, style: new ol.style.Style({ ...
0
votes
1answer
59 views

Leaflet markercluster plugin also showing unclustered points

The following code displays clusters correctly. However, it also displays all the points as well as the clusters, which I don't want. What have I done wrong? Apologies that I cannot simplify the ...
0
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0answers
19 views

Multiple Points CartoDB [duplicate]

I'm new to CartoDB. I would to map people using their addres, buy i have only the city where they live. In the maps there's multiple points overlapping. I would like to click on them and be able to ...
0
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1answer
32 views

Call Toolbox operators of ENVI from IDL code

Is it possible to call the clustering/classification algorithms included in the toolbox of ENVI (gui) from IDL (source code) and how?
2
votes
1answer
84 views

Is it possible to show Leaflet Marker Cluster with JSON API?

I have a problem with displaying Leaflet Marker Cluster working with Leaflet-layerJSON. There are markers, but I cannot show the clusters. This works with GeoJSON, but now I have different data ...
4
votes
1answer
88 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 ...
3
votes
1answer
158 views

Geoserver Clustering. where can i find activemqBroker.war?

I am completely new to clustering setup and I am following this tutorial to setup geoserver cluster. But I am stuck at "HOWTO configure ActiveMQ broker" step, problem is i cannot find this ...
1
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0answers
20 views

CartoDB: Center and zoom to stacked layer items/clusters with setView?

Is there any way to setView on a location with several layer items on top of each other? Mapbox example: http://www.zeit.de/zeit-magazin/2015/16/regional-einkaufen-deutschlandkarte Google Maps ...
2
votes
1answer
57 views

Group by Location within N Meters in PostGis

In PostGIS, given several Location objects, each of which looks something like this: { :id => 1, :latitude => 32.4196, :ll_point => "(-10111.1877176122, -5384086.44077608, ...
1
vote
1answer
87 views

How to merge two point feature classes based on spatial location using ArcPy?

I have two point feature classes, each containing about fifty points. These 2 point feature classes should be merged, or the points of feature class 2 added to feature class 1, as feature class 2 does ...
4
votes
1answer
188 views

Clustering Technique?

I have the following 9 clusters (each colour represent the appropriate cluster): I am looking for a clustering algorithm (if any) that would achieve "realistic" results. The data represents ...
1
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0answers
60 views

Modifying Cluster Analysis script in ArcGIS.com Incident Analysis template to add dissolve for other fields?

I have fiddled around with some of my data, especially a high-count (> 50,000) point data set of business locations. In small scale I have successfully used ESRI's Incident Analysis to cluster these ...
1
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0answers
52 views

Spatial clustering gridded data with missing values (over water)

I'm trying to cluster a spatial dataset, and use the cluster labels as an input to a second process. I've been using the spdep package in R. I've got gridded data at .5 degree lat/lon resolution. ...
1
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1answer
58 views

Problem replicating ArcGIS Grouping Analysis 'grouping effectiveness' statistic results

I posted this question over on Esri's GeoNet, but have not yet gotten an answer. Using ArcGIS v10.2.1, I have been using the Grouping Analysis tool to generate a range of clusters from my data. I ...
1
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0answers
101 views

How to Construct Spatio Temporal Clusters of Time Series Data in R

I have count data of one disease for various districts of a state of India on monthly basis. Is it possible to draw spatio temporal clusters in R? I have checked some R- packages for example ...
0
votes
1answer
22 views

Divide broken line layer in seperate clusters based on location

Building on a earlier asked question on this forum I would like to ask an additional question in getting the task done I asked here: Divide polyline layer in clusters with specific requirements in ...
0
votes
1answer
53 views

CartoDB - visualise multiple properties

Is there a clever way to visualise more than one property in a single map overlay? Ideally I would like to produce a dot grid map in which the size of the dot represents a scaled property and the ...
1
vote
1answer
336 views

Leaflet Marker Cluster: refreshCluster function issue

I am trying to use the markers.refreshClusters(); function to refresh the marker icons for a new styled icon I am trying to work with to highlight the selected cluster. Unfortunately, I keep getting ...
3
votes
1answer
278 views

Cluster Markers with CartoDB

Is there an easy generic way to cluster Markers with CartoDB?
5
votes
1answer
166 views

Dividing polyline layer in clusters with specific requirements in ArcGIS for Desktop?

For my work in ArcGIS 10.2 for Desktop I need to divide line layers into clusters/groups. Currently I am doing this manually, but I like to automate this. The line layers can consist of 50 up to 2500 ...
1
vote
1answer
49 views

OpenLayers 3: Find biggest cluster

I might be able to work this out myself but I am in a bit of a deadline rush and thought about posting this here with the chance that somebody has dealt with a similar issue before. I am using ...
6
votes
1answer
124 views

Segmentation of a big raster

I'm actually trying to convert one raster into a SpatialPolygons. I've got a big raster (12 millions pixels) with a lot of zeros, and some negative values (representing some depression in a DEM). I ...
0
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0answers
61 views

Interpreting Statistical Analysis (Moran's I v High-Low)

I am currently examining the results of spatial statistics using Moran's I and High-Low clustering methods. I have used distance thresholds of 5 miles, 10 miles, and 15 miles for each. Moran's I ...