Rendering 2 million data points on an interactive map

I put together a short demo of loading and displaying 2 million waypoints (GPS locations) on an interactive map, to visualize all the places I have been riding my bike. All data processing and rendering is implemented in Racket:

The visualization scales up to at least 4.36 million points (which is the most I have to test with, if I include running, sailing and other activities), but it should be able to handle much larger number of waypoints.

Enjoy,
Alex.

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That's really cool! Consider sharing on other (even non-Racket) forums, like:

Lobsters: https://lobste.rs/
Reddit: https://www.reddit.com/r/Racket/ (and maybe r/Lisp and r/programming)
Hacker News: https://news.ycombinator.com/
Racket Stories: racket-stories.com
Twitter

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