Features

NDVI (Normalized Differential Vegetative Index):

The Normalized Differential Vegetative Index is a metric for checking the presence and health of a vegetation in a given region.
It is basically how much RED light energy from the visible light spectrum is absorbed by the plant and how much NIR (near-infrared rays) it emmits.
Healthy vegetation absorbs red-light energy to fuel photosynthesis and create chlorophyll, and a plant with more chlorophyll will reflect more near-infrared energy than an unhealthy plant.
The NDVI ranges from -1 to 1, -1 corresponds to a very unhealthy plant and 1 corresponds to a very healthy plant.

The mathematical expression for NDVI is:
NDVI = (NIR - RED) / (NIR + RED)

PV (Portion of Vegetation):

Portion of Vegetation is the ratio of the vertical projection area of vegetation on the ground to the total vegetation area

The mathematical expression for PV is:
PV = (NDVI - NDVImin) / (NDVImin + NDVImax)
NDVImin is the minimum NDVI value a pixel holds in a single image
NDVImin is the maximum NDVI value a pixel holds in a single image

LST (Land Surface Temperature):

Land Surface Temperature is the radiative temperature / intensity of the land surface

The mathematical expression for LST is:
LST = BT / ( 1 + ( ( kn * BT / p ) * np.log(E) ) )

BT is brighness Temperature in celcius and is mathematically expressed as:
BT = (K2 / np.log( ( K1 / TOA ) + 1 )) - 273.15
where K1 and K2 are landsat 8 constants 774.8853 and 1321.0789 respectively

TOA (Top of Atmosphere) Reflectance is a unitless measurement which provides the ratio of radiation reflected to the incident solar radiation on a given surface.
It is mathematically expressed as:
TOA = ML * TIR + Al
where ML and Al are landsat 8 constants 3.42E-4 and 0.1 respectively.

p is mathematically expressed as:
p = hc/A
where h, c and a are plank's constant, speed of light and boltzmann constant respectively

E is emissivity of the land surface and is mathematically expressed as:
( Ev * PV * Rv ) + ( Es * ( 1 - PV ) * Rs ) + C
where:
Ev (Vegitation Emissivity) of location = 0.986
Es (Soil Emissivity) of location = 0.973
C (topography factor) of location = 0.0001
Rv =(0.92762 + (0.07033PV))
Rs=(0.99782 + (0.05362PV))

Dependencies

• Rasterio
• Numpy
• Pandas
• Sklearn
• Pickle

Setup