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
244 views

Is there a Cluster convex hull implementation in OpenLayers?

In this leaflet example. When hovered over a cluster marker, it shows the bounding area of the clustered features which is known as convex hull. Is there a way to reproduce it with OpenLayers?
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2answers
626 views

How to use Leaflet marker clustering with image map only?

I have image map of one state, where I would like to put about 100 markers. Is it possible to use only one image map instead of CloudMade tiles Leaflet usually uses? So, I need only that image to be ...
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1answer
319 views

OpenLayers AnimatedCluster delete all features

I am using OpenLayers.Strategy.AnimatedCluster in my application in order to cluster and show points to the end-user. The example is here. All points are located in concrete vector layer. I need to ...
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1answer
201 views

Leaflet/MarkerCluster plugin - how do update the HTML content of a DivIcon?

In Leaflet, I am using the markercluster plugin, in which you can use the DivIcon class to display custom icons for the clusters. You can set your own HTML for these clusters. However, I can't find ...
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1answer
369 views

Color region polygons according to cluster label

I want to present data on a map of our country. I have used R for showing the clusters on a country! Here the steps I took: setwd('D:/r/cluster2') channel <- odbcConnectExcel('cluster.xls') data ...
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1answer
168 views

How to cluster similar lines in PostGIS?

In PostGIS I have a large database of linestrings which I have obtained using ST_makeline function. I would like to cluster similar lines based on where the lines start and end. Here is an example ...
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1answer
41 views

How to compute drive access to a station based on vehicle origin points? [closed]

I have a shapefile that contains station locations and another shapefile that is the geocoded origins of those who drove to the station. I would like to make a buffer around the station that shows the ...
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1answer
724 views

Leaflet Marker Cluster: Popups won't open after first

I built a map using Leaflet and markercluster.js, and I'm having a strange issue where after I click on the first popup, I'm unable to open any other popup. This happens whether you close the first ...
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1answer
678 views

openlayers cluster strategy - exhibiting custom icons for clusters of 1 feature

i have a page that displays a vector layer imported from a kml file (basically like the the sundials example). it works perfectly well, both using fixed strategy ONLY, as well as using both fixed and ...
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1answer
1k views

creating clusters of point data

I have a map of stores for a retailer. I am trying to form clusters (of these stores) such that each member of a cluster is at most 5km away from any other member and any non-member is at least 10 km ...
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1answer
198 views

Changing size of cluster based on number of markers in Leaflet clustermarker

I'm currently using Leaflet's markercluster add-on, which is working really nicely for some of my initial maps. However, I'm wondering if there is a way to modify the clusters so that the size of the ...
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1answer
87 views

Visualize large amount of geopoints with Geoserver and PostGIS

I have a postgis database with over 50 million rows. Every row consists of a POINT corresponding to lon,lat and a value (number 1-100) I'm trying to create tiles for zoom levels 5-20 that I want to ...
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1answer
1k views

How to use Leaflet Marker Cluster on markers from Leaflet-layerJSON (Overpass API)

I'm having troubles getting the Leaflet Marker Cluster working with Leaflet-layerJSON. I'm trying to make a Leaflet map with data from OpenStreetMap. The markers are showing on the map, but they are ...
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1answer
234 views

How to disperse clusters of proportional markers or polygons?

I am mapping a set of points in ArcMap that are symbolized using proportional marker symbols based on a numeric field value. The scale of the map has lead to alot of the point markers overlapping. ...
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1answer
227 views

How to better visualize features of clusters in Openlayers

I am using the cluster strategy for mapping a large number of features in Openlayers, now I would like to find a good solution for providing info about the features contained in a cluster selected by ...
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0answers
29 views

Algorithm for clustering points into pairs (exactly two) by proximity without re-use

I have a reasonably large list of centroids that I want to cluster into groups of two by proximity (minimizing proximity). I've explored k-means, which does cluster them by proximity, but the count ...
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0answers
37 views

Loading lots of points on leaflet through time slider.

I'm trying to add more than 13 thousand point using Time Slider plugin, but as you can imagine the loading process of all these points puts a heavy burden on the map. Even the slider start to get ...
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0answers
35 views

How to show hierarchical clusters in google maps or other tool?

Google maps marker can be clustered but those clusters expand on different levels. I want to stay on a specific zoom level and cluster a set of markers. Then I want to show sub clusters inside that ...
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1answer
31 views

Assign points with varying radii to central meeting locations

I have a set of points in a city, each with a maximum distance radius of 0.5 - 1.5 miles. From this set of points, I'd like to create a small number of 'meeting points', i.e. locations that are ...
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2answers
44 views

Is it valid to adjust quantile buckets to “nice” numbers for better readability?

I'm making a map about terrorist attacks and fatalities in CartoDB. For data clustering I'm using quantiles. The calculated buckets are 16, 32, 50, 97, 700. Is it okay to adjust the quantiles to make ...
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0answers
14 views

How to organize/cluster nodes moving on the same direction

The Problem I am working on a problem of clustering for mobile nodes. Initially, I though of clustering the nodes based on their angle of movement (relative to the x-axis). However this situation ...
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1answer
159 views

Leaflet - GPX - Clustering

I'm using Leaflet maps together with "Plugins by Pavel Shramov", which allows google usage and GPX file use. This bit was easy enough, but trying now to use markerClusterer. I've spent a few hours ...
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0answers
26 views

Grouping map points into fixed cluster sizes? [duplicate]

"I have a dataset of 655 lat/long pairs which I'd like to split into about 100 groups. A group should have 5-10 pairs which are geographically close to each other. Dense groups should have more ...
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0answers
20 views

Creating single feature to represent group of individual features, based on location and #, using ArcGIS Desktop?

I am looking for an algorithmic way of handling this situation, as I can do it manually with the ruler and some time, but it would be nice to find a programmatic to have Arc do the work for me, so any ...
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0answers
75 views

Clustering the WGS84 point features (projection transformation aspects)

My question is quite trivial and was discussed many times before (like here) but in our case it has the confounding extra requirements... The list of sparsely distributed 2d point features is stored ...
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0answers
135 views

Finding areas with high POINT density from PostGIS table using Python

I have a PostGIS table with thousands of POINT objects and I want to find areas that have a high density of points. I have the DBSCAN clustering algorithm implemented in Python which does exactly ...
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0answers
103 views

Monte Carlo test of Space-Time clustering in R

I have several point patterns representing the distribution of territories of a bird species. Each point pattern represents the distribution of one year. I already succeeded in computing Ripley's L ...
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0answers
107 views

Performing Moran Test using R? [closed]

I’m very new to R so please Bear with me: I have a set of data containing AREA Infested for each region ! and I want to know if there are any spatial autocorrelation between the regions! Here a sample ...
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0answers
64 views

Getis-Ord GI and Moran's I when interested in clustering of data values not points

I have a dataset with many clustered (often coincident) points, each of which contains data. I am not interested in the fact that the points are obviously clustered. I would like to know whether the ...
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0answers
233 views

Leaflet marker cluster by Administrative boundary

Is it possible to perform clustering based on administrative boundary using the leaflet.markercluster plugin? How would I do that? I already have the boundary layer.
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0answers
197 views

Is it possible to cluster markers based on city name in Google Maps API

I have a requirement to display all the customers in map. Since the customer list is too large it looks messy when I place markers. I have tried the marker cluster functionality but it groups based ...
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0answers
68 views

How to Create Polygon shapefile based on change in point value?

Is there a function in ArcGIS that would take analyze the adjacent point or polygon based on percent difference. If the adjacent value is within less than the percent it would dissolve otherwise ...
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0answers
184 views

how do i create clusters of nearby points?

I m trying to create clusters of nearby points (which would be the adresses of my customers around a store). Buffer is not an option cauz i need the zone to be limited by customers, so a polygone ...
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0answers
99 views

Making spatial clusters by direct manipulation of raster pixel values using R

I think this is an overambitious million dollar question, but I'm always optimistic when I pose a question even though I feel like I left no stone unturned! I've processed a raster layer with pixel ...
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0answers
55 views

Collection of polygons from a collection of points

I have a set of points, spread over a wide geographical area. I need to be able to create a set of polygons which best represent the clustered points. And I would like to create the clusters based on ...
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0answers
82 views

Clustering a number of points with the same coordinate around a central point

Is there a plugin in QGIS to randomly distribute points with the same coordinates around the coordinate? Similar to the "shift point plugin", but instead of producing a circle of points the points are ...
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0answers
165 views

What is a good way to cluster point data by item counts in ArcGIS?

I have point features that have as an attribute an asset count. For instance, point A may have 3 assets whereas point B may have 300 assets. My goal is to have each point be in two categories: ...
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0answers
109 views

Is it possible to undertake spatial clustering with QGIS?

Is it possible to undertake spatial clustering with QGIS, and also end up with proportional symbols in a quasi 3-d symbology?
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0answers
407 views

Cloudmade Web Maps API Marker Clustering problem

I've just started learning Cloudmade Web Maps API. I'm at marker clustering, and I'm facing a strange problem; whenever I try accessing the page below, content of elements must consist of well-formed ...
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1answer
4k views

Google Maps MarkerClusterer - Remove all clusters

So, I have a PostGreSQL DB with 317 datapoints - all spatially enabled through PostGIS. I have queried this using PHP as GeoJSON and overlaid it on Google Maps (using a converting routine). I have ...
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0answers
196 views

How Do I Capture when the Cluster Rendering is Completed

I have a graphics layer that draws clusters using the sample custom cluster from ESRI. http://help.arcgis.com/en/webapi/silverlight/samples/start.htm#CustomClusterer We have a Busy Indicator that we ...
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1answer
316 views

How to cluster kml features in OpenLayers

Is it possible to cluster KML features in OpenLayers, and are there any samples? I can find separate samples for clusters and KML but nothing which handles both together. Thanks
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1answer
45 views

Error when running cluster and outlier analysis

I am attempting to run Cluster and Outlier Analysis on a Shapefile Feature Class. The geometry type is a line feature class. I am receiving the following error when attempting to utilize this tool: ...
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2answers
788 views

Explode clusters of overlapping points in ArcGIS Javascript API

In my map application built on ESRI's javascript API there are a number of points that share a lat/long. I need a way to allow the user to see all of the points at a specific location by exploding ...
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1answer
103 views

How can I establish patterns, hotspots and clusters?

AS a crime analyst you need to establish a few maps that would help police to do targeted patrols, I've given data of suburbs, roads, incidents, boundaries. How can I establish patterns, hotspots and ...
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3answers
1k views

Cluster strategy, problem with labels on uncluster features - undefined

I have vector layer - WFS from GeoServer (Postgis). In the Postgis table there are some attributes e.g.: the_geom (of course), adr_adm, ... So I would like display label: adr_adm on features when they ...
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0answers
21 views

Analyzing homogeneity of raster values within polygons

I've been working with raster data of NDVI for agriculture plots. I'm testing the use of descriptive statistics (e.g. range and standard deviation) to observe any variations between plots (I think ...
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0answers
36 views

Convert Eps to geographic distance using DBSCAN

I am using the dbscan cluster (package fpc) in R to find clusters on a set of latitudes/longitudes coordinates. I want to find an eps distance that corresponds to a meaningful geographic distance ...
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0answers
38 views

Grouping Analysis (Clustering) of polygons with streets as borders in ArcGIS?

I have a question about the Grouping Analysis Tool in ArcGIS. Is it possible to use streets as spatial borders for the groups? I want to group a city district autmatically with multiple attributes, ...
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0answers
12 views

Is it possible to use Clustering in Layer list widget in ArcGIS Viewer for Flex?

I utilized Layer List widget in ArcGIS Viewer for Flex to display some layers from server. I would like to use clustering tag for each layer in the layer list. Is that possible?