[GRASS-dev] [GRASS GIS] #2820: r.surf.idw gives broken results - Don't match v.surf.idw

[GRASS GIS]

#2820: r.surf.idw gives broken results - Don't match v.surf.idw
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  Reporter:  lrntct  |      Owner:  grass-dev@…
      Type:  defect  |     Status:  new
  Priority:  major   |  Milestone:  7.0.3
 Component:  Raster  |    Version:  7.0.1
Resolution:          |   Keywords:
       CPU:  x86-64  |   Platform:  Linux
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Comment (by lrntct):

 Here is a way to reproduce the problem:
 {{{
 v.in.ascii input=rainfall2.csv output=stations_vect separator=comma z=3
 g.region vector=stations_vect res=100
 v.surf.idw input=stations_vect output=vsurfidw
 v.to.rast input=stations_vect output=stations_rast use=z
 r.mapcalc expression='stations_int=int(stations_rast*1000000)'
 r.surf.idw input=stations_int output=rsurfidw_int
 r.mapcalc expression='rsurfidw=double(rsurfidw_int)/1000000'
 r.mapcalc expression='rain_diff=rsurfidw-vsurfidw'
 r.colors map=rain_diff color=aspect
 }}}

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Ticket URL: <https://trac.osgeo.org/grass/ticket/2820#comment:4>
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