The 2016 Olympics are getting closer! Last weekend, as part of the first online Mapathon in Rio de Janeiro, Brazil, mappers traced fresh satellite imagery over Rio to add and improve Olympic sport sites, and also map nearby buildings, roads and points of interest.

Imgur Before-after view of buildings in Rio

Mappers added 4020 buildings and 1510 streets and made many significant improvements to important Olympic structures, such as:

The Olympic golf course

And we aren’t finished yet. Keep up with the mapathon until the marathoners hit the streets in Rio!