[Tilesathome] t at h, my plans/priorities

[OJW]

On Sunday 05 August 2007 13:09, Frederik Ramm wrote:
> I know that I'm on the minority side in disputing (a), so I'd like to
> focus on (d). If we make a small change to the way we record metadata,
> we can automatically analyse any upload and say "this is a complete
> upload for level 12 and all sub-tiles up to level 17" (which would be a
> full tileset), but also "this is a complete upload for level 14 and all
> sub-tiles up to level 16" or "for level 6 and all sub-tiles up to level
> 11".

So say that you upload z12-15 on an area that someone has already uploaded 
z12-17.  And let's say that this metainfo is stored under the database key 
"x,y,12", i.e. it's tied to the top-level tile.*

The z17 images in that area still belong to the person who originally uploaded 
them.  So when you upload z12-15, then it will need to replace their single 
"z12-17" metadata with 256 sets of z16-z17 metadata, representing the tiles 
that they uploaded which you didn't overwrite.  

That sounds like *more* database effort to me, than simply saying that 
everyone uploads z12-17 and you only need to store one bit of meta-info 
because it's guaranteed to overwrite all previous images in that area.




* Alternatively, you can store meta-info under the key "x,y,z1,z2" which has a 
similar set of problems