Re: [GRASS-dev] [GRASS GIS] #2046: radius limitation option on v.voroni

[GRASS GIS]

#2046: radius limitation option on v.voroni
-+--
 Reporter:  dnewcomb |   Owner:  grass-dev@…  
 Type:  enhancement  |  Status:  new  
 Priority:  normal   |   Milestone:  6.4.4
Component:  Default  | Version:  unspecified  
 Keywords:   |Platform:  Unspecified  
  Cpu:  Unspecified  |  
-+--

Comment(by mmetz):

 This can be done with v.voronoi + v.buffer + v.overlay.

 For example with hospitals in the NC dataset:

 {{{
 g.region -p vect=boundary_county
 g.region -pa res=100

 v.voronoi in=hospitals out=hospitals_v
 v.buffer in=hospitals out=hospitals_b distance=2 type=point
 v.overlay ain=hospitals_v atype=area bin=hospitals_b op=and
 out=hospitals_vb olayer=0,1,0
 }}}

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Ticket URL: 
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[GRASS-dev] [GRASS GIS] #2046: radius limitation option on v.voroni

[GRASS GIS]

#2046: radius limitation option on v.voroni
-+--
 Reporter:  dnewcomb |   Owner:  grass-dev@…  
 Type:  enhancement  |  Status:  new  
 Priority:  normal   |   Milestone:  6.4.4
Component:  Default  | Version:  unspecified  
 Keywords:   |Platform:  Unspecified  
  Cpu:  Unspecified  |  
-+--
 In the calculation of foraging areas for different bird species, the
 foraging areas can change based on the location of adjacent nests.  I
 would like to run v.voroni to calculate polygons out to a maximum radius
 as a command line option.  The end result would be similar to running
 v.voroni on a set of points , running v.buffer on each point individually
 create a series of polygon layers of individual circles ( that may
 overlap), then intersecting the geometry of each v.voroni polygon with
 each buffer individually to generate a series of polygon layers that are
 then merged to a single polygon layer.

 The bird species that I have in mind has an 800 m maximum foraging range.
 The preferred out put in this case would be the standard v.voroni polygons
 in areas where nests are closer then 800m.  In areas where there are no
 other nests within 800m the polygon would be an 800m radius circle.  The
 maximum distance from the origin point of the v.voroni polygon to any edge
 of the output polygon would be no greater than the distance given in the
 command line option ( in this case 800m)

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