DBI

The DBI operator algorithm computes the Dry Built-Up Index from a given product.

The DBI results from the following equation:

DBI = ((B - T1) / (B + T1)) - ((N - R) / (N + R))

, where:

The bands are:

- B is the Blue band
- R is the Red band
- N is the NIR band
- T1 is the Thermal 1 band
- T is the Thermal band

DBI-Flags

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

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