Simplify geometries only at specific zoom levels (13-14)

[mtravis]

I have an issue where I'm processing a lot of data, around 4 billion features, and it's taken an awful long time to get past 1/0/0 in the part of the process that I believe is building the mbtiles. Is this because it's simplifying the geometries.

I'm using this command:

tippecanoe -f -o my.mbtiles *.fgb -l my_layer --coalesce-densest-as-needed -Z13 -z14 -t /data-tmp

Should I use --simplify-only-low-zooms here? What is considered low zooms?

Are there other flags that would I could use here?

[e-n-f]

The low zooms for this purpose are any zoom levels other that the maxzoom.

It is probably spending all of the time trying to figure out how to coalesce features to reduce the tile size. Is it producing any output saying what it is doing?

Is raising the tile size limit and feature count limit a possibility for you?

[mtravis]

Thanks for getting back to me. It was taking a long time to coalesce features. I can try raising the tile size limit next time.

I'd heard that can effect performance but possibly not if we use PMTiles?