Highlight top spots and black holes

[tillwenke]

see https://github.com/Hitchwiki/hitchmap-data/blob/main/visualization/data_analysis.ipynb

[bopjesvla]

This is gonna be tricky from a UX perspective. I hope the route planner will make this unnecessary as it kinda does this already

[tillwenke]

yeah. thought of it more as a gimmick. and people just love the extremes, so could be used to grab attention.
prolly a good first place for this is the dashboard.