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

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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 ...
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0answers
30 views

MarkerCluster Animation for OpenLayers2 with Lines

I would like to implement a MarkerCluster-Animation in OpenLayers2 but could need some advice where to start. If you have a look at this (OpenLayers2-)webpage: ...
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0answers
27 views

Leaflet MarkerCluster plugin. Weighted Points

I have an huge amount of points I'd like to have on the map so instead of sending millions of points across I have grouped together points that are "close enough" to be the same point. So I have moved ...
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0answers
20 views

Metrics and features for comparison of aggregated trail dataset

I have hundreds GPS traces generated by cars for single road in the city from direction A to B. And I have hundreds of GPS traces generated by people which organized in trail in the mountain from ...
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1answer
160 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 ...
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1answer
114 views

How to Point Cluster With Dynamic Data In ArcGIS API

ArcGIS API is using this Demo to illustrate how Point clustering works with JSON data. In my case I am generating some point graphics from MySQL Database by a jQuery AJAX request like following code: ...
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1answer
483 views

How to group points in QGIS?

I need to group 400 points in 10 groups with 40 points each. The goal is to get the 40 points geographicly together like this: Any idea how to do this with Qgis Pisa?
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25 views

Center PopupTemplate when using ClusterLayer

I am trying to use the below code in my application https://developers.arcgis.com/javascript/jssamples/layers_point_clustering.html. The only change I am doing is changed the height from 100% to 400px ...
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3answers
400 views

ArcGIS server 10.3 fails to add machines to the cluster “Unable to access the config store”

Trying to Apply cluster scenario for ArcGIS Server on a test environment, 2 servers Node-02 and Node-03 these 2 servers are connected to a domain controller and have administrative users on the ...
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2answers
255 views

Big data sets and challenges using the Leaflet client

I am using Leaflet to present around 90.000 data points. My test code is generated using the plugin QGIS2leaf in QGIS 10.10.1. I am using clustering and reviewing the code I can see that this is ...
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0answers
133 views

unsupervised classification in qgis (Orfeo toolbox)

I want to run an unsupervised classification of two landsat images in qgis. Therefor I want to compute a kMeans and a SOM (self organizing maps classification). Unfortunately it doesnt work. I tried ...
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37 views

grouping feature service layers in ArcGIS viewer for flex and applying clustering, is this possible?

I have some feature service layers I want to apply clustering to, and I also want to group them, or set them up as sublayers, for example I want to group the layers by category. I haven't been able to ...
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145 views

GeoSever PointStacker Renders incorrect position

I've been trying the GeoServer Rendering Transformations - Point Stacker. According to this docs there's an optional cellSize parameter for setting the "Size of the cells in which to aggregate points, ...
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2answers
224 views

Geoserver clustering

I am running into problems configuring the jms clustering of Geoserver. Here is the background: I have 4 virtualboxes, each running a Geoserver 2.7.1 with the jms-cluster extension. I would like to ...
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1answer
1k views

Leaflet markerClusterGroup 'undefined is not a function'

I have to create a map with more than 5000 points from a geojson. So I would like to use markercluster plugin with Leaflet. I wrote the following code with help from the documentation and from other ...
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1answer
110 views

Leaflet marker cluster from JSONP WFS + Popups

I'm fairly new to Leaflet and just managed to use Leaflet marker-cluster with a JSONP WFS which provides my data from Geoserver. Now I would like to have a popup for my markers by mouse click. But I ...
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1answer
352 views

Openlayers 3 Cluster Strategy not projecting properly

As the title suggests, my Openlayers map is not displaying clustered points properly and I'm not sure why. My code is pretty simple and straight forward, here it is: JSfiddle: http:// ...
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1answer
418 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 }), ...
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1answer
60 views

How to create a Planer Point Pattern in R using a Shapefile of point features

I have just started to learn spatial analysis of point pattern with R. On page 20 of this book, the "Swedishpines" dataset has been used for inspection purposes. However, I want to use my own dataset ...
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100 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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70 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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1answer
525 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 ...
3
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1answer
64 views

Analyzing hot spots using point attributes?

I'm interested in looking at where hot and cold spots of certain social indicators (such as poverty, housing characteristics, urban sprawl, etc...) are in coastal communities along the East Coast. I ...
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1answer
357 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 ...
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0answers
386 views

DBSCAN gives “AttributeError: NoneType has no attribute issparse”

I am running a Python script invoking the DBSCAN tool to cluster feature points. When I open ArcMap, load the feature layer, and run the script, it works the way I expect it to. But if I run it ...
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0answers
785 views

How to draw small circles within a big circle(greater radius) on the basis of marker size on google maps?

I have more than 1000 markers at different location in my Map. I read Lat and Long from a xml file and render it in Google maps and create circle over them on the basis of city name within given ...
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0answers
107 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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1answer
251 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 ...
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1answer
88 views

Creating clusters with same number of points in each in CartoDB

I have a map of about 4200 retailers and I would like to create clusters, with each cluster containing 10 retailers in CartoDB. How can I do this?
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2answers
139 views

how to make clusters from small polygons with constraint of boundary touching?

I want to make some clusters from a bunch of small polygons with the constraint that each basic unit (polygon) in the resultant cluster must share a portion of its boundary with at least one other ...
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0answers
109 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
45 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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0answers
36 views

k-NN Search with GIS dataset

I have made a k-NN search algorithm in matlab, and I want to implement it using a GIS data-set. A Google search didn't yield any good test data-sets. At this point, I have created a data-set by taking ...
2
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1answer
104 views

Create a grid with statistics of the merged shapefiles in QGIS

I operate with QGIS. I have to split the shape files of the buildings and the roads of a city into a grid of 500x500m per square and into each square I have to obtain the total free area, the total ...
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1answer
248 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 ...
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0answers
408 views

K-means cluster analysis with initial centers with ArcGIS

I am trying to figure out a way to make a K means cluster analysis using initial centers for the clusters, and only classifying, no iteration, for the features in a feature class. Having a feature ...
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2answers
87 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 ...
2
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2answers
609 views

Remove clumps of pixels in R

I would like to remove isolated pixels (or clumps of pixels <9) from my raster image. library(raster) # create some raster data r <- raster(ncols=12, nrows=12) set.seed(0) r[] <- ...
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0answers
51 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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2answers
269 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 ...
3
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1answer
200 views

Hot Spot Analysis using ArcGIS for Desktop?

I have a point shape containing locations of cars and a line shape containing roads. Now I want to identify hotspots/clusters. I want to find hot spots where for example the speed of the cars is ...
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0answers
271 views

Creating the Regions based on spatial clusters

I need to create areas for my shapefiles for spatial analysis for each. So I have a number of stations and I created 5 clusters based on the distance. code: Al <- ...
2
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1answer
98 views

clustering map (North, Centre, South) in R

I am looking for a method to partition map in 3 groups (North, Centre, South) like this: how to do this in R please stations.txt Code : Al <- shapefile("DZA_adm/DZA_adm0.shp") # read in ascii ...
2
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1answer
1k 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 ...
1
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1answer
361 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 ...
1
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1answer
159 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 ...
3
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0answers
51 views

How to set m parameter of clusterR function in R?

I want to manage a clustered computation on raster and thus use the "clusterR" function in R (package 'raster'). However, there's a tuning m parameter to set, but the only explanation about this ...
1
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1answer
190 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 ...
5
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0answers
53 views

Clusters of Same Size? [duplicate]

I am attempting to use the Grouping Analysis tool in the Spatial Statistics (in ArcGIS 10.2) to group state high schools (points) together based on enrollment and location. Is there a way to make ...
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0answers
28 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 ...