False colour composite and NDVI
LandSat 8 false colour composite image (left image) showing agricultural fileds at Bothaville in the Free State. The colour combination used shows healthy vegetation in deep red, water bodies in black and non-cultivated areas in different shades of green. A Normalized Difference Vegetation Index (NDVI) of LandSat 8 image (right image) was calculated by using the near infrared and visible spectral bands using the following formula (NIR-VIS/NIR+VIS). The image shows healthy vegetation in red, water bodies in blue and non-cultivated areas in cyan.