Uses NDVI  to color Sentinel-2 images and create awareness of green areas in cities around the World.
Visualization of Tallinn with the Green City script.
Visualization of Paris with the Green City script.
Visualization of Beijing with the Green City script.
 Normalized difference vegetation index: https://en.wikipedia.org/wiki/Normalized_difference_vegetation_index
Y. Zha, J. Gao & S. Ni (2003) Use of normalized difference built-up index in automatically mapping urban areas from TM imagery, International Journal of Remote Sensing, 24:3, 583-594, DOI: 10.1080/01431160304987