Media visualization
They use this method to create a visual reputation of all the user-generated photos.While taking all that data and turning it into data that one can see and understand.
API
API is a way for different computer systems to talk to each other.By using this it gathers millions of public photos and the meta data to go with, such as location and when it was taken
Custom Software
They use custom software to visualize all these images together in groups.So now looking at the collection of photos arranged in ways that highlight trends and connections.