Other differences from the original: orientations are weighted by length of street segment, and I'm not simplifying the topology, so a curvy road isn't viewed as a straight line between the points where it intersects with other roads. 2/13

But wait, there's more! I also rendered maps of each city with the streets color-coded according to direction, with streets at right angles coloured the same way, making grids easier to spot. 3/13

Here they are, alphabetically: Calgary (@cityofcalgary), Cambridge (@cityofcambridge), Charlottetown (@TheInspiredCity) and Edmonton (@CityofEdmonton) 4/13 pic.twitter.com/ttPo8wTm6J

Fredericton (@CityFredGov), the GTA, Guelph (@cityofguelph), and Halifax (@hfxgov) 5/13 pic.twitter.com/2R01h1Tbek

Iqaluit (@CityofIqaluit), Kitchener (@CityKitchener), KW as a whole, and London (@CityofLdnOnt) 6/13 pic.twitter.com/Gs9gSh7RSt

Montreal (@MTL_Ville), Ottawa (@ottawacity), Quebec City (@villequebec) and Regina (@CityofRegina) 7/13 pic.twitter.com/3k0NXZeB0H

St John's (@CityofStJohns), Stratford (@StratfordON), Toronto (@Toronto) and Victoria (@CityOfVictoria) 8/13 pic.twitter.com/5iK7SrCPz9

Waterloo (@citywaterloo), Whitehorse (@city_whitehorse), Windsor (@CityWindsorON) and Winnipeg (@cityofwinnipeg) 9/13 pic.twitter.com/INRtfk7IQD

Finally, Yellowknife (@OurYellowknife) 10/13 pic.twitter.com/M9xbEh57xD

Thoughts: KW is a mess (no surprise to anyone who lives here), but St John's is worse. Cities that seem messy from the radial plot are often the result of multiple off-angle grids growing against each other (e.g. Montreal, Quebec City, Winnipeg). 11/13

Given the messiness of KW, Cambridge and Guelph are remarkably tidy. In Cambridge, you can see the influence of Preston and Galt, but Hespeler's grid orientation is dominant. (Or rather, both are aligned with the surrounding country grid.) 12/13

The geo data for some cities include a lot of countryside too, but I don't think it affects things much, as they're very sparse. If you look at Windsor, there's a clear North-South bias just from the rectangular nature of their grid. 13/13

Especially for anyone new following me because of this, you should check out @gboeing, who wrote the OSMnx, the library I used to generate these images, and who also wrote the original version of the script I used to make the radial plots: geoffboeing.com/2018/07/compar…

By request, here's Kingston pic.twitter.com/hPZ5BknUhM

And from elsewhere in the thread, Hamilton: twitter.com/alfedenzo/stat… Vancouver: twitter.com/alfedenzo/stat… And Lund, Sweden: twitter.com/alfedenzo/stat…

Saskatoon pic.twitter.com/2LU1p5X6TY

St Catharines. Note how the north/south part of the grid is compass-aligned, the large parts of the east-west (especially the major streets) are not aligned east-west, but instead are aligned with the lake. This means most major intersections aren't perpendicular. pic.twitter.com/uVKuPOmRA6