[GRASS-dev] [GRASS GIS] #2488: v.neighbors: "No points found" error while using points map

GRASS GIS trac at osgeo.org
Fri Nov 14 05:10:52 PST 2014

#2488: v.neighbors: "No points found" error while using points map
 Reporter:  neteler      |       Owner:  grass-dev@…              
     Type:  defect       |      Status:  new                      
 Priority:  critical     |   Milestone:  7.0.0                    
Component:  Vector       |     Version:  svn-releasebranch70      
 Keywords:  v.neighbors  |    Platform:  Linux                    
      Cpu:  Unspecified  |  

Comment(by mlennert):

 Replying to [comment:5 neteler]:
 > I have added another screenshot. What it does I can see but why?
 > The "half moons" are not particularly useful...

 Juste brainstorming here, but I could imagine that this module could be
 useful when you are using kernel-based techniques and you have to decide
 on a kernel radius. Running v.neighbors first with varying radius sizes
 allows you to get an idea of how many points you will use on average for
 determining the value of each pixel.

 Another idea: assuming you have 360° antennas and a known reach of these
 antennas you can quickly get a gross estimate of intensity of coverage,
 e.g. for identifying (very roughly) zones with higher levels of
 electromagnetic radiation. (And yes, I know that this will be pretty much
 nonsense, unless you are in a completely flat, unbuilt area ;-) ).


Ticket URL: <http://trac.osgeo.org/grass/ticket/2488#comment:6>
GRASS GIS <http://grass.osgeo.org>

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