[Tilesathome] Data change to one tile that affects other tiles.

[Christopher Schmidt]

On Wed, Dec 05, 2007 at 01:18:22PM +1300, Rob Reid wrote:
> I'm currently fixing up some lakes in New Zealand that have problems 
> with the direction  of the ways on islands within the lakes.
> 
> After I fix the problem I re-render and upload all the z12 tiles that 
> were affected by the problem, depending on how many tiles the lake 
> extends across.  This process is working fine.
> 
> My question is what would happen if I just fixed the problem island but 
> did not render anything manually.  I assume the tile containing the 
> changed data would be queued for rendering  as normal  but am I correct 
> in thinking that surrounding tiles that may have been messed up too will 
> not automatically be re-rendered?

Correct.

> Also, I'm aware that there is problem with lowzoom but am not sure of 
> the specifics.  Is the problem with the automatic handling of lowzoom 
> requests  and manual rendering is still possible somehow or is it that 
> lowzoom is not currently possible at all?

The server does not currently hand out lowzoom requests, because doing
so essentially brought the tile processing to a crawl and many clients
were behaving very poorly. I do not know if it is possible to render
lowzoom manually, but baesd on my tests, any tileset which is uploaded
will be processed correctly, so it should work if you can process
manually. 

Regards,
-- 
Christopher Schmidt
MetaCarta