Apples and Pairs

Within the last week, two friends have gone to New York from London, and each of them received a copy of my dual map.

The reaction of others to that little piece of artwork always seems really positive (unlike to much of the other material here). But although it is either obvious or perceptive to spot the similarities and it requires either local knowledge or research to match the particular areas, we should ask the same question for any disparate alignment - is each of the models just following a blind pattern based on simple evolutionary rules, or is it really a striking coincidence?

You know the answer. So the map was common sense. It has faults, but I'm still proud of it.