A week or so ago I put together a simple project illustrating the locations of coffee shops within the Toronto area. I was curious about the density of coffee shops within the city and also the distributions of the larger coffee chains. In the image below the small dots are locations and the areas are coloured based on the closest location. The colours are Red - Tim Hortons, Green - Starbucks, Yellow - Second Cup, Purple - Coffee Time, Orange - Country Style, Blue - Other.
The Tim Horton's red dominates much of the geography outside of the city and the location density is obviously much higher in the downtown area. Zooming in to downtown shows a more fractured landscape with strong pockets for Starbucks and the independent or small cafes.
Here is the interactive coffee territory map of Toronto. Data was gathered from OSM, interactive map built using Leaflet, and the voronoi overlay created with D3.