Assembling nearby data points into groups
0
votes
1answer
172 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
1
vote
0answers
213 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 ...
2
votes
2answers
216 views
Merge nearby items into a single representation
I'm investigating OpenLayers and I'm trying to see if it's possible to filter down the number of displayed feature items.
Is it possible to display many nearby items as a single point item on a map ...
6
votes
1answer
485 views
Grouping map points into fixed cluster sizes
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 ...
1
vote
1answer
1k 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 ...
1
vote
0answers
124 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 ...
7
votes
1answer
411 views
Appropriate distance metric for spatial clustering of geographic coordinates
I have a set of locations in geographic coordinates, and I would like to group the points using hierarchical clustering followed by tree-cutting at various "heights" in order to calculate group-wise ...
3
votes
1answer
942 views
How to cluster 2 datasets in Google Maps API V3?
I'd like to produce a map that shows thousands of Markers.
I'm using Markersclusterer to show all these markers.
Yesterday, I received another huge data set (completely different) and I'd like to see ...
3
votes
2answers
526 views
How to group points into a user-provided number of clusters?
I am looking for a process in ArcGIS that takes a point feature class and groups the points into a user-provided number of clusters. I am working in ArcGIS but I'd welcome any suggestions that ...
4
votes
1answer
509 views
Openlayers: Clustering in Openlayers.Layer.Text
I have a map that displays 5 layers of markers. Each layer is a group of POI's. I load the POIs from textfiles using
var cycling = new OpenLayers.Layer.Text( "Cykling", { location:"./textfile.txt"} ...
22
votes
6answers
700 views
What tools for regionalization/redistricting can you recommend?
I am looking for tools for regionalization / districting in GIS.
So far I have been able to identify
Districting ArcGIS extension (now also online)
REDCAP (currently limited to 50k input polygons)
...
0
votes
1answer
416 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 ...
6
votes
1answer
152 views
Finding largest number of observations within a given radius
I have the following problem: Given the location of insured properties (say houses with fire insurance), i have to find the largest sum of insured values which fit into a 300m radius. Now, my first ...
13
votes
3answers
829 views
Best practices for visualising clustered features in web maps?
I'm looking for the best symbol to display clustered features in the ArcGIS Server JS API.
I don't like the "fly-out" animated cluster symbol, as used in the Silverlight API clustering or the JS ...
7
votes
3answers
713 views
How to cluster points based on a kernel density?
I have a large dataset with 36k points representing commercial land uses, each with a field containing the square footage. I have run a kernel density analysis on this dataset, producing a raster ...
2
votes
2answers
537 views
A lot of pointers to load on map-A better solution
I have to project a lot of points present in my Database say more than 100000. I heard that using geoserver is a better solution as it can render any number of points and from ...
7
votes
3answers
329 views
How do I figure out if there are clusters of one set of points around another set of points from a different layer?
I want to see if there is clustering of a certain type of buildings (x) around another type of buildings (y). The two point files are in different layers. I cannot figure out which tool I would use to ...
6
votes
6answers
4k views
How do I cluster XY point data? (ArcGIS 9.3)
I have a whole bunch of icons displaying on a map, I want these clustered together as was suggested to me for a different question here... ArcGIS 9.3. How do I increase Picture Marker Symbol ...
4
votes
3answers
944 views
Need to create a collection of polygons from a collection of points
I have a set of points, which are spread over a wide geographical area. I need to be able to create a set of polygons which best represent the clustered points.
In parts, some points may simply lie ...
6
votes
2answers
601 views
how to cluster points of interest by lat lon for my WP7 app
I have alread asked this question on SO, so I appologies if duplicating this is bad form. I will link to each of the sites if I get the right answer...
...
6
votes
5answers
1k views
Algorithm to find polygons enclosing points
I'm trying to find an algorithm that can determine the smallest possible polygons to cover a number of points.
I know how to get the convex hull around all the points, but say that the points are ...
7
votes
4answers
3k views
Find Clustered Points Within X Distance with N Points
We're planning on doing some cluster analysis exposed as a geoprocessing service in ArcGIS 10 - specifically these two:
Cluster and Outlier
Hot Spot
But we have to meet a specification for cluster ...
6
votes
2answers
1k views
Spatial statistics tools : clustering analysis on raster data
I've an apparently simple problem, but i can't find a clear methodology to use.
I'm tasked to delimit "urban areas" by vector convex polygons, using the Gridded Population of the World dataset from ...
8
votes
2answers
990 views
Incremental spatial clustering algorithm
I'm in search of a incremental spatial clustering algorithm. Here is my use case:
users create entries with an initial position
users may change the positions of existing entries
I now want to ...
