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> easily download Wikipedia and Openstreetmap

Isn't OSM like 2TB to host if you include all tile scales? I guess you could skip the last few where most of the size explosion lies but that doesn't give you much precision.



But about 70% of all images are something like https://tile.openstreetmap.org/10/399/390.png, e.g. water...


> 7.8 TB, too much water.

That could be easily compressed by having all of these link to one water image though, no?


Theoretically yes. But no person ever is going to look at all the tiles (on the highest zoom levels) in the sea, so they are not rendered by default, and only on demand.





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