Earlier this calendar month I read an interesting article inwards the Cartography together with Geographic Information Science journal, examining Design Principles for Origin-Destination Flow Maps. In the newspaper the authors advise 3 expert pattern principles for visualizing origin-destination flows where specific routes betwixt the root together with finish are unknown or unimportant.
One of the 3 pattern principles suggested inwards the article is that "curved flows are to a greater extent than effective than direct flows". Influenza A virus subtype H5N1 expert event of this pattern regulation tin order the axe endure seen inwards do inwards Bostongraphy's Hubway Trip Explorer. In this interactive map Bostongraphy has mapped trips taken on Boston's bike portion network.
The map allows you lot to explore trips taken on the network yesteryear fourth dimension of day, solar daytime of the week, calendar month of the year, inwards dissimilar weather condition conditions together with yesteryear the sex & historic stream of the rider. Once you lot get got used these options to filter the information the origin-destination flows are hence visualized on a map of Boston using curved stream lines.
The purpose of these curved lines to demo the origin-destination flows on the map seems much to a greater extent than effective than assigning specific routes (for event yesteryear using the shortest road betwixt the root & destination), The purpose of wider curves for longer distances ensures that the private origin-destination flows tin order the axe endure clearly differentiated on the map. If direct job routes betwixt the private bike stations had been used instead of these curved job flows the private origin-destination flows would endure much harder to read on the map. It belike likewise wouldn't get got been equally aesthetically pleasing equally this rather beautiful looking map of the traffic flows betwixt Boston's Hubway stations.
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