Label density can be optimized at z8

[wipfli]

In particular at z8 many labels in urban areas cannot be rendered due to collisions. Below is an example of New York, rendered with maplibre map.showSymbolCollisions = true. Maybe we can optimize tile size and bring fewer labels to the renderer which means fewer collision computations. Could make sense to have a symbol pruning step in Planetiler (cc @msbarry).

[nvkelso]

Thanks for the reminder, I have a config for this I'll PR!

[msbarry]

The built-in way to do it in planetiler would be tweaking the label grid size/limit parameters but that's a pretty coarse tool..I think there are better density-based approaches to explore in the future, for example add labels in order of importance but skip any that are within some number of pixels from a label point you've already added.