Re: [GRASS-user] Grouping spatial points

[Micha Silver]

On 08/07/2014 14:58, Johannes Radinger wrote: Hi, I've a point vector containing more than 500 points. Some of these points are spatially clumped while others are single independent points (from viewing the map). Now I am wondering if there is any tool in  GRASS (or maybe other spatial-statistical software  like R) that can be used to group the data so that each point clump is assigned to a group and each single group to its own group. Of course, this needs a criterion where to distinguish between groups/clusters. I'd like to have groups that are separated by a distance of at least 5 km. Actually this might be quite simple, if you are happy with the rigid 5 km. distance: Just create a buffer around all points of 2.5 km, merge the buffer circles that overlap, then overlay the original points on the merged buffer areas (clusters) to get a "cat" value from each cluster into the points attrib table. There's a nice example of merging buffers in the v.buffer man page.   Is there any recommendation of a simple or more advanced procedure to do that? All suggestions all welcome! Thanks! Best, Johannes This mail was received via Mail-SeCure System. _______________________________________________ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user This mail was received via Mail-SeCure System. -- Micha Silver GIS Consulting 052-3665918 http://www.surfaces.co.il

_______________________________________________
grass-user mailing list
grass-user@lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/grass-user