Richard Fairhurst

The metadata entry isn't parsed by tilemaker at all, it's just passed through to the output in the .mbtiles file. It's just there for clients (well, Mapbox GL) that require...

I think you've slightly misunderstood things (...or maybe I have!). tilemaker does write the required values. It writes rows like this to the SQLite `metadata` table: ```` name | value...

I'll do another issue for the Mapbox JSON field. On the empty z12 tiles, I can't reproduce that in any form. Creating an .mbtiles and looking at the z12 data...

[This extract](https://github.com/systemed/tilemaker/files/9035176/limay.osm.pbf.zip) of Limay consistently reproduces it with `simplify_length` and `simplify_ratio` set as above. With less simplification it's ok. The simplification appears to be making the water multipolygon's outer cross...

Timings for Great Britain: ```` User time (seconds): 12276.29 System time (seconds): 154.09 Elapsed (wall clock) time (h:mm:ss or m:ss): 22:21.18 Maximum resident set size (kbytes): 14389332 File system inputs:...

I wouldn't expect GB to be much smaller - there aren't many big polygons (apart from the coastline). Africa sounds like a big improvement. One slightly odd rendering issue -...

Clipping box looks good! Similar memory usage to last time, time up slightly (but then it's generating more tiles so I'd expect that): ```` User time (seconds): 19092.60 System time...

Very similar! Happy to run it on a different extract if you think it might be interesting. ```` User time (seconds): 19011.64 System time (seconds): 209.51 Elapsed (wall clock) time...

It's apparently "the total number of bytes written / 512". I'd expect it to be a bit greater given that the bbox is larger. (Not sure why "file system inputs"...

My attempt to run this on the planet was _much_ slower than before (after 37 hours it was still on z11), but this might be because I was using the...