Layers for Foursquare

FourSquare has introduced a layer concept that will allow you to view physical map spaces through a number of outside sources of information. More examples at the link. Not new ... in Google Maps for example you can choose layers of information to understand a space. Geographical Information Systems all work with different views of a space built from a number of accumulated information layers based on the interests of an observer. What is a potential big thing here is the commercial link between providers of information and consumers. New focused connections, with a simple gaming element, that can create a useful market.