http://en.wikipedia.org/wiki/Geographic_information_system#Data_representation http://en.wikipedia.org/wiki/Geographic_information_system#D... Yeah, I'm just l

http://en.wikipedia.org/wiki/Geographic_information_system#Data_representation http://en.wikipedia.org/wiki/Geographic_information_system#D... Yeah, I'm just learning about this stuff, so I cannot offer a detailed explanation whatever :/