Over the last few days Visual Statistix has been publishing a nice series of maps showing the road direction patterns in American and European cities. These static maps with accompanying rose diagrams are a great visualization of urban road patterns. They are particularly illuminating in illustrating the differences between the planned grid-patterns of American cities and the more organic sprawl found in European cities.
VeloViewer has now released an interactive map that allows you to view the road orientation for any district or city in the world. Using the map you can zoom in on any area of the world and a rose diagram displays the road orientation distribution of the current map bounds.
The map uses the underlying data for roads in OpenStreetMap to calculate the road direction patterns on the fly. This means that you can move the map around and zoom in or out on any location and the rose diagram will update on the fly to show the road direction distribution within the current map view.
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