GDVI

The GDVI operator algorithm computes the Generalized Difference Vegetation Index from a given product.

The GDVI results from the following equation:

GDVI = (pow(N , nexp) - pow(R , nexp)) / (pow(N , nexp) + pow(R , nexp))

, where:

The bands are:

- R is the Red band
- N is the NIR band

and the coefficients are:

- nexp is the Exponent used for GDVI coefficient

GDVI-Flags

Also the processor computes an additional flags band called 'gdvi_flags' with the following bit coding:

Bit Position	Description
Bit 0	The computed value for GDVI is NAN or is Infinite
Bit 1	The computed value for GDVI is less than -1 (minus one)
Bit 2	The computed value for GDVI is greater than 1 (one)