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

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3
votes
2answers
136 views

clustering points in postgresql to create contour map

UPDATE: To try to make this a little more simple, is it possible to create a query which selects a group of points such that each point in the group is at most X units away from at least one other ...
4
votes
1answer
150 views

How to compare spatial patterns (crime cases vs population)?

I am looking for a way to statistically compare two spatial patterns in shape polygon data (not point pattern analysis). Let's say I have a city map divided in neighborhoods (barrios), in shape ...
0
votes
1answer
25 views

Self organizing maps with Postgis

I am trying to plot hot regions. It's reorganizing mapping We have a table "product" with three attributes : lat log n_items: number of items that we sell I'd like to group point in one polygon ...
0
votes
1answer
68 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 ...
4
votes
0answers
222 views

How to Perform a Grouping Analysis of Points to Divide a Polygon into n Number of Sub-Regions?

I'm attempting to create n sub-regions from a polygon based on a cluster analysis of a bunch of overlapping raster layers (physical layers, eg. depth, currents, waves...). Briefly, I can create a ...
3
votes
0answers
58 views

Performing cluster analysis in R with Point Datasets

I am a R-Beginner, but I want to use it for some spatial statistics. I want to check the relation between the occurrence of ill persons and the existence of water in a area of interest. To give you a ...
3
votes
0answers
38 views

Clustering driven by an enum/list

Given a set of 2D points ( or vertices if you want ), the values stored for each point are: coordinate on x coordinate on y an enum or a value from a list in general for the sake of this example ...
2
votes
0answers
95 views

Installing knn on PostgreSQL for windows

I am trying to install the extension KNN for clustering as an extension on my PostgreSQL database. I have downloaded the file http://www.pgxn.org/tag/analysis I found instructions on how to ...
2
votes
0answers
122 views

How to cluster features based on their proximity?

I have around 500 features (Forests) that I want to cluster based on their proximity, and then work with those clusters. I only have the ID, and shape area of those features. How can I cluster them?
2
votes
0answers
198 views

Geoserver Clustering Problems

I have problems setting up a clustered Geoserver. So far got four instances (version 2.2.4) running on a ubuntu linux box with a shared data directory behind HAProxy. I use one of the geoservers to ...
2
votes
0answers
320 views

how to show information window for the marker cluster

This is my markercluster code : i need information window for the markercluster icon as well as marker icon, i have another cluster.js file, can some one please tell me how can i show the information ...
1
vote
0answers
18 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 ...
1
vote
0answers
28 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.
1
vote
0answers
23 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. ...
1
vote
0answers
28 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 ...
1
vote
0answers
39 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 ...
1
vote
0answers
60 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 ...
1
vote
0answers
57 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 ...
1
vote
0answers
48 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 ...
1
vote
0answers
59 views

Determining spatial cluster of park types in ArcGIS

Question 1: I am trying to determine which (if any) of my different park types are spatially clustered across my study area (city boundary). There are 162 total parks, 9 nominal categories (which ...
1
vote
0answers
96 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: ...
1
vote
0answers
67 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?
1
vote
0answers
339 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 ...
1
vote
0answers
169 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 ...
0
votes
0answers
20 views

Finding a common area by a set of ID variables?

I am trying to find a way to find a way to get matches of areas based on multiple sets of ID variables. I am using state-county and state-puma as an example below, but I am wishing to do this for more ...
0
votes
0answers
45 views

OpenLayers drawing features on clustered layers

I'm having problems adding and moving features on a clustered (wfs) layer. When I add a new feature all the clustered ones disappear from view. Plus much hacking needed to actually save the new ...
0
votes
0answers
90 views

Progress-bar not appearing on Leaflet-MarkerCluster

I am having problems with the progress-bar of leaflet markercluster. I am using it in a geodjango application which uses the django-leaflet app to handle the leaflet requirements. Everything works but ...
0
votes
0answers
19 views

Is it possible to integrate (Cluster layer + Time slider) in ArcGIS JSAPI?

I am using ESRI suit 10.1 (ArcGIS Desktop + Server) and JSAPI 3.5/3.6 I am trying to integrate time aware data and cluster layers in single map but both are unable to display. According to web help: ...
0
votes
0answers
55 views

Creating Cluster “Zones”

I've looked at the "Questions that may already have my answer" and it didn't appear that the questions were specific to my questions. Although I am sure I am not uncovering some brand new quetsion ...
0
votes
0answers
89 views

How to use dbscan in python for gis coordinates?

I am curious how to input gis coordinates (lat long) in the http://scikit-learn.org version of dbscan for python. Thanks
0
votes
0answers
58 views

Help needed to get PINs clustered from the switch2osm.org tutorial (GeoJson)

I want to use basicly two PlugIn-Codes: for dragging with reload <http://switch2osm.org/using-tiles/getting-started-with-leaflet/> and for clustering, I wish to involve features from ...
0
votes
0answers
45 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 ...
0
votes
0answers
65 views

Mapserver cluster group

I need to implement cluster (http://mapserver.org/development/rfc/ms-rfc-69.html) on my geojson point layer. There are several classes. How can I group the classes? E.g.: If I have 10 points within ...
0
votes
0answers
210 views

How to put markers from geoJson to MarkerClusterGroup?

How to put markers from layer WTGS (which reads geojson from php file returned from postgis database) to L.MarkerClusterGroup? WTGS = new L.geoJson(null, { pointToLayer: function ...
0
votes
0answers
395 views

Getting “pointer” cursor at mouseover for rules/symbolizers based clusters in OpenLayers

I successfully used the AnimatedCluster plugin for OpenLayers. My codes uses OpenLayers.Rules and symbolizers. How can I get a "pointer" like mouse cursor when hovering over a cluster of features? My ...
0
votes
0answers
43 views

openlayers clustering alternative

Is there some alternative to group features in OpenLayers? My goal is to speed-up the process of rendering. Clusters allow to do that a bit faster than rendering just plain features. So, any ...