Nice! I think it's a good initiative to organize more local types of meetups in the geospatial community. Geospatial experts are a bit too few and inbetween to bump into many of them on a regular day, so anything that gets these people together is a big win.
As a side note to HN readers, geospatial is a super interesting application/ specialization that you might consider getting into if you're looking to add more meaning and purpose to your programming or tech career. You're often working to improve quality of life for someone, there are lots of interesting companies, people are generally super friendly and accessible, and there's a wealth of interesting problems and challenges to work on. My 2 cents!
So just because average speed is marginally (!) higher than it was 20 years ago it's "too fast to be clean"? Great "data journalism" there. If anything, it looks pretty stable since the 2000s.
What about improvements in technology, what about different routes and distance each year, improvements in training, number of time trial or mountain stages, maybe there is more riding as a peloton in recent tours, resulting in higher averages?
Agree on a blog and self-hosting it. I do the same and has been very satisfying. Static site via Netlify and static site generator like Hugo works very well. Make sure archive.org can find it so that your pages are preserved. Self host so that noone does a bait and switch on you like Medium, or shuts you down when they're doing a pivot. The internet needs more quality content that is written because people find it interesting and want to share with the world. Build it without the cruft, trackers, newsletter popups, etc that bog down the modern web.
It's refreshing when you find these interesting websites and articles, and it's also encouraging to know you're part of the solution when you build them.
How do the calculations go so smoothly? I mean for each pixel that is potentially in the shade there can be a many 'upstream' pixels in the direction that the light is coming from that could cause it to be shady if there was something high there. Doing that calculation for each pixel seems very intensive, or is it achieved in some other way?
Lots of other topics via the homepage as well: https://mathpages.com/