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

[GRASS GIS]

#2488: v.neighbors: "No points found" error while using points map
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 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  |  
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Comment(by mlennert):

 Replying to [ticket:2488 neteler]:
 > The functionality of v.neighbors is a bit obscure to me:
 >
 > {{{
 > GRASS 7.1.svn (nc_spm_08_grass7):~ > g.region rast=zipcodes -p res=500
 > projection: 99 (Lambert Conformal Conic)
 > zone:       0
 > datum:      nad83
 > ellipsoid:  a=6378137 es=0.006694380022900787
 > north:      228500
 > south:      215000
 > west:       630000
 > east:       645000
 > nsres:      500
 > ewres:      500
 > rows:       27
 > cols:       30
 > cells:      810
 >
 > GRASS 7.1.svn (nc_spm_08_grass7):~ > v.neighbors input=schools_wake \
 > output=schools_wake_500m method=count size=3 --o
 >  100%
 > WARNING: No points found
 >
 > GRASS 7.1.svn (nc_spm_08_grass7):~ > v.info -t schools_wakenodes=0
 > points=167
 > lines=0
 > boundaries=0
 > centroids=0
 > areas=0
 > islands=0
 > primitives=167
 > map3d=0
 > }}}
 >
 > Is the module not working or is the use case wrong?µ

 IIUC, the module searches around the cell centers with a radius = size/2,
 so I guess your size parameter is just way to small for the use case. But
 only guessing here.

 Moritz

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Ticket URL: <http://trac.osgeo.org/grass/ticket/2488#comment:1>
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