[GRASS-dev] [GRASS GIS] #3932: i.vi: NDWI unnecessarily requires red band

[GRASS GIS]

#3932: i.vi: NDWI unnecessarily requires red band
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 Reporter:  sbl      |      Owner:  grass-dev@…
     Type:  defect   |     Status:  new
 Priority:  normal   |  Milestone:  7.8.1
Component:  Imagery  |    Version:  git-releasebranch78
 Keywords:  i.vi     |        CPU:  All
 Platform:  All      |
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 i.vi requires a red band in any case, even if e.g. NDWI does not need one.
 So, in order to make the module run, a map has to be given also for the
 red band. That seems like unexpected behavior to me.
 Maybe better to leave all input bands optional and add a check for the
 requested VI if required bands are provided...

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Ticket URL: <https://trac.osgeo.org/grass/ticket/3932>
GRASS GIS <https://grass.osgeo.org>