#3385: Typo in the i.vi man page
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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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