[GRASS-dev] [GRASS GIS] #3449: Diagonal cells not treated properly with r.reclass.area and minarea

[GRASS GIS]

#3449: Diagonal cells not treated properly with r.reclass.area and minarea
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 Reporter:  mankoff  |      Owner:  grass-dev@…
     Type:  defect   |     Status:  new
 Priority:  normal   |  Milestone:  7.4.0
Component:  Parser   |    Version:  7.2.2
 Keywords:           |        CPU:  Unspecified
 Platform:  All      |
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 Discussion: http://osgeo-org.1560.x6.nabble.com/making-sense-of-r-reclass-
 area-td5342391.html

 Issue according to Markus Metz:

 With method=rmarea, r.reclass converts the raster clumps to vector areas.
 That single cell in your example below, that either belongs to the larger
 clump 1 (with -d) or forms a separate clump 2 (without -d) will always be
 a separate small vector area (topology or not does not matter here) and
 thus will always be removed independent of the 2-cell clump. The vector
 approach is thus not working here as expected.


 Suggested solution:

 1) The "-d" flag should not be valid when "rmarea" option is set.

 2) Documentation should be updated to reflect this

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Ticket URL: <https://trac.osgeo.org/grass/ticket/3449>
GRASS GIS <https://grass.osgeo.org>