[Tilesathome] Request timeout

[Robert (Jamie) Munro]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Brent Easton wrote:
> On 14/11/2007 at 11:16 PM hinsons26 at btinternet.com  wrote:
> 
> > If tile sets take so long to render why not render starting from a higher
> > zoom level, rather than zoom level 12? This would also reduce re-rendering
> > tiles that have not changed I think.

> Zoom 12 takes only a couple of minutes, it is Zoom 16 and Zoom 17 that is the killer.

Yes, but if you start at zoom 13 instead of 12 you have only 1/4 of the
number of Z16 and Z17 tiles to render. This would also help with
rendering the tiles that are currently too complicated and require the
T at H clients to have several gigabytes of memory.

So if a tile is known to be complicated, the clients could be sent a
zoom 13 or zoom 14 tile to render instead of zoom 12, and the server
could make the zoom 12 tile from the 4 or 16 partial zoom 12 tiles
uploaded. If a tile is known to be simple, the client could be sent a
zoom 11 or 10 tile and render 4 or 16 zoom 12 tiles.

We could analyse a planet dump to determine if a tile is simple or
complicated. This would be fine, except in the rare case that a bulk
upload has happened on the area between when the planet was dumped and
now, in which case, if the client can't cope it can return the tile, and
the server can hand it out in smaller chunks next time.

Robert (Jamie) Munro
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.6 (Darwin)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iD8DBQFHO5aGz+aYVHdncI0RAk/UAJ41ZHILE80cMNodsEAxbJBVDGHiNwCfQ7Vz
oVv67A7QO3GXgBfCFTypHD0=
=u5S3
-----END PGP SIGNATURE-----