[GRASS-dev] [GRASS GIS] #3385: Typo in the i.vi man page

[GRASS GIS]

#3385: Typo in the i.vi man page
--------------------------+------------------------------
  Reporter:  micha        |      Owner:  grass-dev@…
      Type:  task         |     Status:  new
  Priority:  normal       |  Milestone:  7.2.2
 Component:  Docs         |    Version:  7.2.0
Resolution:               |   Keywords:  Vegetation Index
       CPU:  Unspecified  |   Platform:  All
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Comment (by micha):

 I see that the source for MSAVI2 in i.vi is consistant with the docs. The
 equation in the source is:

 result=0.5*(2*(nirchan+1)-sqrt((2*nirchan+1)*(2*nirchan+1)-8*(nirchan-
 redchan)));

 whereas in:

 Qi, J., Chehbouni, A., Huete, A.R., Kerr, Y.H., Sorooshian, S., 1994. A
 Modified Soil Adjusted Vegetation Index. REMOTE  SENS.  ENVIRO 48,
 119–126.

 The MSAVI2 equation is slightly different. There it's 0.5*(2*nir + 1 -
 sqrt(...))

 ??

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Ticket URL: <https://trac.osgeo.org/grass/ticket/3385#comment:1>
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