experimental openstreetmap renderer - work in progress

status: I can read PBF/MVT and make some debug images using styles hardcoded in Nim.

see demo server

1. use tilemaker (or planetiler) to make vector tiles
2. use this tool (lunarender3) to render map
3. profit! (or at least have map with nice colors)

I am far away from point 3, but I have some ideas:

• instead of JSON stylesheet use Lua (hence lunarender name)
• make app capable working both as localhost server and backend for public map (behind some Nginx)

• original lunarender
• 2018 proof of concept in Go
• mapstyles which will be ported to this version

• Vector tile specification (as we are implementing our own parser)
• Vector tiles test suite
• OpenMapTiles schema
• current test data (Luxembourg from OpenMapTiles)
• MAKI icons
• https://www.axismaps.com/guide

• on linux it needs to be build with -d:useStdLib because of httpbeast not included or something like this
• be able to write rules in lua
• unreverse reversed y coordinate
• handle broken tiles gracefully
• bind other interfaces to be able to host demo on server
• host pbf content for javascript clients
• mark occupied areas to not collide text labels and icons
• draw text labels from neighbor tiles to not crop labels crossing tile borders (not needed on all sources)
• make "average lines" from paths to put street names on
• derive zoom levels above 14 from zoom 14
• optimize a lot
• translate lua rules via fengari for use in Leaflet.VectorGrid
• https://docs.microsoft.com/en-us/bingmaps/articles/bing-maps-tile-system
• https://github.com/paulmach/orb/blob/master/maptile/tile.go
• document each tile source quirks