[dandelany]

The algorithm isn't broken, the zones you're talking about are squashed together to show you, at any given point, which McDonalds is the closest to that location. It's like a Voronoi diagram (http://en.wikipedia.org/wiki/Voronoi_diagram).

[andersh]

For a map intended to show the distance of points from the nearest McDonalds' that isn't the best algorithm; equal pixel colour should => equal distance. I was thinking it'd be cool if distance were represented by height, in a 3D rendering. Also, make it a flythrough, with music :)