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by systoll
2904 days ago
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180 degree rotational symmetry happens because almost all roads are bidirectional -- if there's a road pointing north, it's also a road pointing south. 90 degree symmetry seems like a consequence of the road system consisting more of straightness and 90 degree turns, with no other specific angle being common. https://www.google.com/maps/@-22.9111837,-43.2566471,14z Rio fits the bill. There's no overarching grid, but if you zoom into any small area, you'll usually find a pattern of rectangular blocks with 90 degree intersections. As far as I can see, the only viable way out rotational symmetry would be to use concentric 'ring-blocks' either for local areas or for the city as a whole. The rings would cancel themselves out, and the 'spokes' could be places relatively freely. So... Canberra might have an interesting distribution? https://www.google.com/maps/place/Canberra+ACT+2601/@-35.288... |
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