| NDTI Algorithm Specification | |
The Normalized Difference
Turbidity Index algorithm was developed
by J.P Lacaux & al. (2006), allowing for the measurement of
water turbidity.
Wetlands are one of our most important yet endangered and
underevalued environments.
Sustainable management of wetland ecosystem is necessary as it
serves the important functions such as food storage, water quality
maintenance and providing habitat for different species of
wildlife.
More than 75% of commercial fish species require wetlands to
complete part of their life cycle.
Many local and migratory birds also utilize coastal wetlands as
breeding and roosting sites as well as providing food and habitat
for many animal and plant species.
Wetlands are also a valuable buffer against coastal erosion, storm
surges and flooding.
The NDTI results from the following equation:
NDTI = (red_factor * red - green_factor * green) /
(red_factor * red + green_factor * green)
Also the processor computes an additional flags band called 'ndti_flags' with the following bit coding:
| Bit Position | Description |
|---|---|
| Bit 0 | The computed value for NDTI is NAN or is Infinite |
| Bit 1 | The computed value for NDTI is less than -1 (minus one) |
| Bit 2 | The computed value for NDTI is greater than 1 (one) |