The dark-green, rectangular, reforested area of the Auwahi dryland forest in Hawaii as seen from above with surrounding grassland. Photo: Arthur Medeiros, USGS. Public domain.

What Is The Difference Between Afforestation and Reforestation?

Katarina Samurović

Both reforestation and afforestation represent a conversion of non-forested areas into new forests. So what's the difference between the two terms?

The blank pink shaded area on the left shows the geographic information available for Kibera before the crowdsourced effort by Spatial Collective filled in geographic data (right).

How Users are Helping to Map Kenyan Slums

Kevin Wisher

One of the latest ongoing, user-generated mapping projects involves the mapping of slums in Kenya.