Functional equivalence of spectral vegetation indices
1984
Perry, C.R. Jr | Lautenschlager, L.F.
Numerous formulae, vegetation indices, have been developed to reduce multispectral scanner (MSS) data to a single number for assessing vegetation characteristics such as species, leaf area, stress, and biomass. Part I of this report gives the history and formulae of some four dozen vegetation indices. Studies investigating the empirical relationships among vegetation indices are summarized. Part II of this report develops the idea of two vegetation indices being functionally equivalent: Two vegetation indices are taken to be equivalent for making a set of decisions, if the decisions made on the basis of one index could have been equally well made on the basis of the other index. The utility of these ideas is explored in the context of alarm models and graphical displays. Several widely used indices are shown to be equivalent.
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