Opened 3 years ago

Closed 3 years ago

#2934 closed defect (fixed)

Documentation error in WRT to MSAVI parameters

Reported by: pmav99 Owned by: grass-dev@…
Priority: normal Milestone: 7.0.5
Component: Imagery Version: 7.0.3
Keywords: Cc:
CPU: Unspecified Platform: Unspecified


According to's documentation, the following input parameters are to be specified for MSAVI2 only:

    Value of the slope of the soil line (MSAVI2 only)
    Value of the intercept of the soil line (MSAVI2 only)
    Value of the factor of reduction of soil noise (MSAVI2 only)

The formulas for MSAVI* are:

MSAVI = s(NIR-s*red-a) / (a*NIR+red-a*s+X*(1+s*s))	
MSAVI2 = (1/2)*(2(NIR+1)-sqrt((2*NIR+1)^2-8(NIR-red)))

AFAIK the formulas are correct, so I guess that the soil parameters should be required for MSAVI instead of MSAVI2. Is that accurate?

Change History (2)

comment:1 Changed 3 years ago by martinl


comment:2 Changed 3 years ago by neteler

Resolution: fixed
Status: newclosed

Yes. I had fixed that earlier this year (r69038 + backports).

Additionally added examples for each index in the manual in r69040 (msavi + wdvi yet unclear).

I close the ticket since I believe that the issue is addressed.

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