I second the idea that this doesn't sound like machine learning. I wouldn't be surprised if there were no machine learning or data mining algorithms involved i

I second the idea that this doesn't sound like machine learning. I wouldn't be surprised if there were no machine learning or data mining algorithms involved in Facebook mapping EXIF-embedded geographic coordinates in digital photographs and suggesting locations for an album based on points-of-interest near those coordinates. Maybe some neat work with GIS enabled this, but I don't see anything that strongly indicates machine learning.