I want to render an XYZ tile set where Z varies from 0 to 153. I assume 
most tile renderers (e.g. OpenLayers) won't work beyond zoom 53, as 2^53 is 
approximately Number.MAX_SAFE_INTEGER. So we won't be able to calculate the 
tile's URL, let alone other possible issues. (In OpenLayers, around zoom 
53, I believe I'm starting to see visible seams between tiles where there 
should not be seams. Also around zoom 53, the lat/lng position of a marker 
in Leaflet seems to quantize to about every ~5 pixels).

Am I correct in assuming OpenLayers cannot go to zoom 153?

I'm thinking about extending it to support this, namely with a tile layer, 
by replacing JavaScript Number arithmetic 
with https://github.com/MikeMcl/bignumber.js/ arithmetic. Voila, right?

But on second thought, I wonder if it would be wiser to build on something 
simpler, like https://github.com/d3/d3-tile/blob/master/src/tile.js.

Any thoughts? Advice (like which OpenLayers files/functions need rewriting)?

Thanks,
David

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