These graphs looked very familiar. I'm still digging to see if these types of polar histograms were used before this 2019 research from Geoff Boeing [0], but I

These graphs looked very familiar. I'm still digging to see if these types of polar histograms were used before this 2019 research from Geoff Boeing [0], but I haven't found it yet. [0] https://geoffboeing.com/2019/09/urban-street-network-orientation/ https://geoffboeing.com/2019/09/urban-street-network-orienta... [edit] yes, they're also called rose diagrams. Here at least one reference from 2013 https://www.researchgate.net/publication/258954759_Entropy_and_order_in_urban_street_networks https://www.researchgate.net/publication/258954759_Entropy_a...