6sqft via Metro:
In an effort to promote urban tree cover, researchers at MIT’s Senseable City Lab have developed Treepedia, a platform for mapping the canopies of ten different major cities. Using Google Street View panoramas to serve as a Green View Index (GVI) to compare and evaluate green canopy coverage, Treepedia provides a visual map of trees and vegetation in Boston, Geneva, London, Los Angeles, Paris, Sacramento, Seattle, Tel Aviv, Toronto, Turin, Vancouver and of course, New York.
Researchers chose GVI over satellite imagery so as to “represent human perception of the environment from the street level,” according to the Treepedia site. GVI is measured on a scale of 0 to 100. A city with a GVI of 100 would be completely covered by tree canopy.
New York ranked the third lowest of the ten cities, with only Paris and London having less tree coverage. With a GVI of 25.9 percent, Vancouver was found to have the most tree coverage.