Spike maps use the height of spikes to encode data geographically. The format provides a similar effect to frequency trails where the layering looks 3-D-ish, except spikes are typically centered on an area instead of running parallel.

Anyways, like most visualization methods with a name, there is an R package for spike maps by Timothée Giraud.

If D3.js is your jam, there’s also a solution for that. You can also take the no-code route with Datawrapper.

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Nathan Yau
http://flowingdata.com

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