Improve tile generation

[orblivion]

Protomaps (the vector rendering library I use) doesn't seem to support footpaths/pedestrian roads at all, if you look at their leaflet demo linked from the github for protomaps.js. Ideally I think they should show up as dotted lines or something.

At some point I decided to generate those paths as roads as a holdover, but in retrospect that's going to give people the wrong idea. For Launch, let's remove pedestrian/footpath ways altogether to match what Protomaps has. For the future, I think I could add support to protomaps.js, and upstream it if they want.

- [ ] Remove footpaths/pedestrian roads from tile generation for Launch.

As for the rest, I think we could skip for launch, unless we see something bad and obvious.

• Post-Launch, add footpaths/pedestrian roads back to tile generation, and add support for them as a dotted line in protomaps.js

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Post-Launch

• Water in some places is broken. In particular, look at NYC. Maybe it has to do with misinterpreting the ferry lines as areas? Maybe we could just axe those.
• Make the tiles look good and somewhat follow the Protomaps.js spec
  • Follows this:
    • https://github.com/protomaps/protomaps.js/tree/main/src/default_style
  • Supposedly it follows this (though it doesn’t, unless these refer to different versions of the spec):
    • https://protomaps.com/docs/frontends/basemap-layers
• Add the .shp files for land use etc that the tilemaker configs want to use. (maybe)
• Hide POIs when sufficiently zoomed out.
• Trails, pedestrian paths, cycle paths, etc, now show up as as a dark red dotted line.
  • This is due to a patch I made on top of protomaps.js
  • Contribute the changes back to Protomaps? Not too likely. The other protomaps renderer (not for Leaflet) actually has these, so it's probably on their radar for the leaflet version.
  • Get feedback?
  • Separate "urban" from "rural" paths. The latter should stay red.
• Delete anything in the mbtiles configs that I'm not using. All unused attributes ("class" etc) should be gone. That could shrink the output files a little actually.

[orblivion]

I went ahead and added footpaths to protomaps.js. Wasn't hard. Generated new maps, available in the appVersion 24.

The rest of this issue will be post-launch!