#2934: Documentation error in i.vi WRT to MSAVI parameters -------------------------+------------------------- Reporter: pmav99 | Owner: grass-dev@… Type: defect | Status: new Priority: normal | Milestone: 7.0.4 Component: Imagery | Version: 7.0.3 Keywords: i.vi | CPU: Unspecified Platform: Unspecified | -------------------------+------------------------- According to `i.vi`'s documentation, the following input parameters are to be specified for `MSAVI2` only:
{{{ soil_line_slope=float Value of the slope of the soil line (MSAVI2 only) soil_line_intercept=float Value of the intercept of the soil line (MSAVI2 only) soil_noise_reduction=float 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? -- Ticket URL: <https://trac.osgeo.org/grass/ticket/2934> GRASS GIS <https://grass.osgeo.org> _______________________________________________ grass-dev mailing list grass-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-dev