emilyhesp

Web Map Link: Click Here!

For this project, I created an interactive web map of the distribution of NDVI values across the city of Paris.

The Normalized Difference Vegetation Index (NDVI) is a measure used to illustrate the health of vegetation. Plants absorb much red light, and reflect a lot of near infrared light. These two bands of light were used to calculate the mean NDVI for each hexagonal cell in this map. 

Values below -1 are non-vegetated surfaces, such as water or buildings. Values near 0 are bare soil or stressed vegetation. Values between 0.3-0.6 are moderately healthy, and anything above 0.6 is very healthy. 

This map was created to identify if and where built spaces hinder the health of urban vegetation in Paris. Urban vegetation is essential for the provision of ecosystem services, which are the direct and indirect benefits that ecosystems offer for human life.

Visualizing the spatial relationship between built spaces and urban vegetation health can help city planners identify the regions where changes must be made to protect or increase vegetations levels.