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

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0answers
89 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 ...
0
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0answers
34 views

Applying Spatial Clustering test using R? [duplicate]

I’m very new to R so please bear with me: I have a set of area infested by a disease (AIS) annually data and I want to apply some cluster methodology to detect regions with similar (AIS) patterns. I ...
0
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1answer
81 views

MYSQL 5.6 Cluster / chain points by distance to any other point without millions of calculations?

I have a table of approx 10,000 - 20,000 dynamic points across the globe stored as lon/lat points. I want to cluster any point within (roughly) 3km of any other point into one point (and return the ...
0
votes
0answers
156 views

Spiderfy Unclustering Effect in OpenLayers

I am looking for a good way to display multiple features (with custom marker icons) all located at the same location. At all zoom levels I need to be able to see all markers at a location either all ...
3
votes
1answer
142 views

Spatial Classification

I am not sure what to call my problem. From this image, I have a set of classified polygons (colored). I would like a way to classify the white polygons in the image. I don’t have any attributes to ...
0
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1answer
42 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: ...
1
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0answers
51 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 ...
0
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0answers
67 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 ...
1
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0answers
179 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
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1answer
148 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 ...
3
votes
2answers
376 views

How can I GROUP BY linear spatial clusters with PostGIS?

I have a series of points in a horizontal line, arranged into discrete spatial clusters by the underlying data pattern. Here's an example of what they look like: How can I use PostGIS to group them ...
1
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1answer
178 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. ...
0
votes
0answers
32 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 ...
2
votes
1answer
98 views

Matching two point clouds without loss (nearest neighbor, but more complicated)

I have two point clouds, one with demographic and one with electoral data. Points in both clouds represent the same empirical entity (say, a village, or an urban neighbourhood), but are not in the ...
5
votes
1answer
208 views

How to grow several concave hulls until they completely fill a larger area without overlap?

This is my problem: I have a very large point layer with polling station locations across one country; each point belongs to a specific constituency (900k points, 4k constituencies). I wish to use ...
3
votes
1answer
108 views

Is it possible to distinguish between points with the same coordinates?

I have several points with the same coordinates in one layer and of course they are located on top of each other. Is there a way to separate this points automatically (not manually)? I don't want to ...
4
votes
0answers
161 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 ...
1
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0answers
182 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
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0answers
67 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
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0answers
166 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 ...
4
votes
2answers
516 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 ...
2
votes
2answers
378 views

Is it possible to generate a heatmap on the server-side using ArcGIS Server?

Using ArcGIS Server's JS API it is possible to generate a heatmap at runtime, as in the example at http://tmappsevents.esri.com/website/heatmap/index.html This requires having client-side access to ...
1
vote
1answer
204 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 ...
0
votes
2answers
621 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 ...
1
vote
1answer
39 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 ...
0
votes
0answers
112 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 ...
1
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0answers
86 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
1answer
104 views

OpenLayers, Get clustered point's val

I'm working on a map with WMS overlays and a lot of markers, my problem is when I try to calculate the average of points clustered, I've found how to differentiate the behaviour and the label text ...
1
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0answers
54 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 ...
0
votes
3answers
919 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 ...
7
votes
1answer
181 views

Generate clusters of X points within N meters

I have a set of roughly 4,000 points in very close proximity and I need to generate clusters of 5 points, with each point no farther than 50 meters from the (mean?) center of the cluster. I've ...
-1
votes
1answer
78 views

Automatic Clustering in ArcGIS for Desktop? [closed]

Given a set of random data points on a map, I would like to cluster the data points based on number of data points in a cluster, time to travel within all the data points in the cluster,and/or number ...
1
vote
0answers
77 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
28 views

How to divide my area into adjecent polygons containing 80 points each? [duplicate]

I have a couple of thousand points in my dataset. I need to create clusters that each consists of 80 points. The specific selection of which points to put into a cluster is not critical - only the ...
1
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0answers
77 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 ...
2
votes
1answer
131 views

Fast Clustering Algorithm for Geographic Data?

I have been browsing through the net in my attempt to find a fast clustering algorithm to cluster geographic points, but lot many of the results found were for clustering algorithm in general and not ...
3
votes
1answer
594 views

How to cluster Raster data

I have thousands of Raster data concerning the ice coverage at the pole at different times (days) over several years. Now I would like to perform a cluster analysis. I want to split the data into ...
1
vote
2answers
210 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?
-2
votes
3answers
162 views

Is AMEOBA ArcToolbox compatible with ArcGIS for Desktop 10.2?

Is the AMEOBA ArcToolbox compatible with ArcGIS 10.2? My error (when trying to run one of its tools) is noted below. (click to enlarge)
2
votes
2answers
337 views

Show different marker for cluster and icon for single vector features in OpenLayers

I have a vector layer which is geoJSON file containing school points and their attributes,to visualize this i defined cluster and show circle which size is based on the number of features it contains. ...
1
vote
0answers
149 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: ...
3
votes
2answers
1k views

Cluster Strategy different Labeling at Different Level

what I did? I am trying to plot some points using cluster strategy of openlayer using animatedCluster plugin. I have gson data as given: { "type": "FeatureCollection", "features": [ { ...
2
votes
2answers
1k views

How to merge/cluster smaller contiguous polygons to form larger ones?

Any help you can give an inexperienced college GIS user would be greatly appreciated. I am using both ArcGIS ArcMap 9.3 and 10 on desktop (i.e. not online), and the only info I can find on License ...
0
votes
1answer
100 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 ...
7
votes
3answers
251 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 ...
1
vote
0answers
99 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?
3
votes
1answer
551 views

Find clusters of points based distance rule [duplicate]

I have some points that I need to divide into groups based on clusters of points: x <- c(-1.482156, -1.482318, -1.482129, -1.482880, -1.485735, -1.485770, -1.485913, -1.484275, -1.485866) y <- ...
2
votes
2answers
648 views

Distribute ArcGIS services across multiple servers

What do you do when you have so many published services in ArcGIS that running even one instance of each service maxes out RAM/CPU? We've grown to the point where we have more published services than ...
1
vote
1answer
610 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 ...
2
votes
0answers
120 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 ...