[GRASS-dev] [GRASS GIS] #3888: r.buffer dropping zone

GRASS GIS trac at osgeo.org
Mon Aug 12 23:37:09 PDT 2019


#3888: r.buffer dropping zone
--------------------------+---------------------------------
  Reporter:  dnewcomb     |      Owner:  grass-dev@…
      Type:  defect       |     Status:  new
  Priority:  major        |  Milestone:  7.6.2
 Component:  Raster       |    Version:  svn-releasebranch76
Resolution:               |   Keywords:  r.buffer
       CPU:  Unspecified  |   Platform:  MSWindows
--------------------------+---------------------------------

Comment (by mmetz):

 Replying to [ticket:3888 dnewcomb]:
 > I have a raster with 5 ft resolution cells.  When I specify distances=
 5,10,15,20 and units=feet, the first zone is value 1, distances calculated
 from these locations.
 > The second zone is value 3 5-10 feet
 > The third zone is value 4 10-15 feet
 > the fourth zone is value 5 15-20 feet
 >
 > Should there not be a value 2, 0-5 feet?

 In theory yes, but with a resolution of 5 feet, there are no NULL cells
 closer than 5 feet to non-NULL cells, thus there are no cells with value
 2, 0-5 feet.

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Ticket URL: <https://trac.osgeo.org/grass/ticket/3888#comment:2>
GRASS GIS <https://grass.osgeo.org>



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