[Tilesathome] Lowzoom approaches. Feedback appreciated.

[80n]

There has been a lot of work done to get the lowzoom tiles looking good (by
Alan Millar, I believe).

It would be a shame to have this good work undone by the appearance of pale
spotty tiles ;)

I vote for option 1 as the immediate quick fix - which should preserve all
the good work done by Alan, and then option 2 when someone has time to work
on it.

The automatic server-side processing of lowzoom tiles looks like the best
approach, assuming the server can deal with the load.  I suspect that its a
better trade-off than the bandwidth used by doing it client side.

80n


On Wed, Jul 16, 2008 at 7:13 AM, spaetz <osm at sspaeth.de> wrote:

> The t at hngo server rollout happened yesterday and apart from a few
> glitches (many of whom have been fixed since), I am quite happy with
> it, especially performance-wise.
>
> One area that seems to have proofed a bit immature is the automatic lowzoom
> generation. My simple tools don't reach the quality of the perl
> lowzoom tool yet. I would like to have your input on how I should
> proceed:
>
> 1) Turn off automatic lowzooms. This is trivial and you will have to
> upload the lowzoom 'tiles','captionless', and 'caption' tiles just as
> before, with the only change that a lowzoom tileset spans z6-11. All
> the existing tools will continue to work.
>
> 2) Live with the suboptimal lowzoom stitching until I have fixed up
> things and found better ways to create nice looking low zoom tiles and
> to combine them with the caption layer. This could easily take a week
> or 2.
>
> 3) Somebody (not me) modifies the tah client to be able to process
> lowzoom requests (integrating the existing lowzoom generation
> tool). The server, knowing which lowzoom tiles need to be updated can
> then simply issue lowzoom requests. These would be processed by the
> clients and uploaded as rgular lowzoom tilesets. I actually favor this
> solution, but don't vote for it, if you aren't prepared to code it :-).
>
> Your pick. Feedback appreciated, especially by 80n who knows the
> current lowzoom generation best, I think.
>
> spaetz
>
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