giCentre alumnus, contributor, friend and Tableau guru Rob Radburn has been using OD Maps to make sense of spatial flows.
You can see the revealing maps on Rob's Tableau Public page: Virtual Water - The unseen flow of water across America through agriculture
OD Maps are a great way to make sense of spatial flows and the way in which such flows vary spatially through maps showing information at two scales concurrently. Have a look at our featured paper that explains them: Visualisation of origins, destinations and flows with OD maps
