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Forget groceries. Large swaths of the District are missing lots of urban amenities, like cupcakes, and bike shops (or, looked at another way, some parts of the city are cupcake dumping grounds). How do we know? Because D.C. photographer and computer cartographer M.V. Jantzen put them on a map. Go play with it.

* UPDATE, 11:18 a.m. – Jantzen forgot Olivia’s Cupcakes! A cupcake oasis.