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It's z16 globally - as soon as this is solidly out in the wild, we'll be working hard on getting deeper zoom levels. Each zoom level is exponentially larger than the last, so it's a significant challenge.

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As a maps dev, I'm very familiar with those exponential scaling problems, 4^z is a bitch. :-) Thanks for taking on this problem.

What zoom level are you all at in major US metro areas?

Is there a way to selectively cache to deeper levels in certain areas? That'd be rad.

We're doing selective rendering with MapBox Light, which is deeper in cities. For this, it's better to have always-there zoom levels. Otherwise you grapple with the deep, deep problem of someone panning from a high-zoom area to a low one, or using an API like Leaflet programmed to zoom to a level. Unless you control the API and have a zoom-depth-api like Google, having a map with highly variable max zooms isn't an easy call.

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