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

[Rob Reid]

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?

The reason I ask is that I'm writing a brief guide for fixing these 
messed up lakes and will need to tell people to manually request any 
renders that won't happen automatically.

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?

fyi
One of the lakes I've been fixing is  here 
<http://www.informationfreeway.org/?lat=-45.19140025633026&lon=167.74430877882895&zoom=10&layers=B000F000>, 
messed up at  z10 but if you zoom into  z12 should all be ok.

rcr