Mapping isn't a finite problem. If you read about the Coastline Paradox (http://en.wikipedia.org/wiki/Coastline_paradox http://en.wikipedia.org/wiki/Coastline_p

Mapping isn't a finite problem. If you read about the Coastline Paradox (http://en.wikipedia.org/wiki/Coastline_paradox http://en.wikipedia.org/wiki/Coastline_paradox), every map is based on abstraction. You can get more and more detail but there will always be parts that are simplified and abstracted. It's like trying to get to the door by going half the distance each time. Eventually, it'll be a small distance (and not a big problem, which is generally the case for Google Maps) but you'll never completely solve it.