[OC] Heatmaps meiner persönlichen Citi Bike-Fahrthistorie

This is the personal-level visualization to complement my [systemwide heatmap post](https://www.reddit.com/r/dataisbeautiful/comments/1qgalgb/oc_citi_bike_rides_visualized_as_a_stravastyle/) from yesterday.

Citibike only gives data on the starting and ending docks, so routes are approximated using Google Maps biking directions.

You’ll notice that the chart with the red lines looks very fuzzy. The blur is from intentionally adding a small offset to each point in each route, making them not overlap perfectly with the street grid. It degrades the accuracy of the map, but provides for a really cool organic-looking visual effect, almost like blood vessels.

Data Source: https://citibikenyc.com/system-data

Tools: D3.js, Python

[Blog post on how I did it](https://yangdanny97.github.io/blog/2026/01/17/citibike-strava-heatmap)

[Github Repo](https://github.com/yangdanny97/citibike-heatmap)