[Tilesathome] lowzoom tile generation

[Robert (Jamie) Munro]

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Raphael Studer wrote:
> Hello,
> 
> At the moment, the LowZoom Tile generation works like this:
> - lowzoom process takes some 12z tiles and compress them to a lower level tile
> 
> On this, or another, list, i've read about the idea to create special
> 12z tiles where only main routes (highway=primary) and some other
> important things like big lakes/rivers/cities where rendered.

They could be uploaded at size 128*128.

I think that lowzoom itself should be run on the T at H server. The upload
stuff should mark which z12 tiles are new since the last time lowzoom
was run. Then lowzoom could generate all the z11 tiles that have those
z12 tiles in them, and work it's way up to z1.

Robert (Jamie) Munro
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