[Tilesathome] Lowzoom rendering

[80n]

The new lowzoom method uses a different process.

The first step is to generate a lowzoom caption-only layer for z8-z11.
There's no layers.conf in svn that will do this at the moment, but the one I
use is included below.

You then have to upload this layer and wait until it has be processed by the
t at h server.  Currently the next step expects to be able to download the
caption layer, and you don't get up-to-date results unless its there.

The second step is to run the tools/lowzoom/lowzoom_composite.pl script
using the following arguments:

lowzoom_composite.pl x y 8 12 tile captionless caption

This will read the z12 captionless base layer and the caption layer from z8
to z11 and composite these together to create the tile layer which is what
ultimately gets uploaded.

This approach currently works best for z8 - z11, there is a projection bug
which causes captions to be misplaced at levels lower than z8, so usual
tilestitching method is still the best approach for z0 - z7.

There's a summary of the approach here:
http://wiki.openstreetmap.org/index.php/Tiles%40home#How_the_client_works

80n

My layers.conf for z8-z11:

# Layer configuration for tiles at home
# ==================================
#
Layers=lowzoom
LayersCapability=lowzoom


Layer.lowzoom.MaxZoom=11
Layer.lowzoom.Rules.8=osmarender/caption-z8.xml
Layer.lowzoom.Rules.9=osmarender/caption-z9.xml
Layer.lowzoom.Rules.10=osmarender/caption-z10.xml
Layer.lowzoom.Rules.11=osmarender/caption-z11.xml

Layer.lowzoom.Prefix=caption
Layer.lowzoom.Preprocessor=
Layer.lowzoom.RenderFullTileset=1

Layer.lowzoom.Transparent=1



On Sat, Feb 23, 2008 at 10:40 AM, Jocelyn Jaubert <jocelyn.jaubert at gmail.com>
wrote:

> Hi,
>
> I'm doing some lowzoom rendering by running:
> ./tilesGen.pl xy 133 93 8
>
> But the tile I generate are completely different than the other ones.
> In fact, it seems that I don't have the code to simplify the amount of
> printed town names.
>
> My client is up to date (revision 6954).
>
> Did I forgot something ?
>
> Thanks,
> Jocelyn
>
> _______________________________________________
> Tilesathome mailing list
> Tilesathome at openstreetmap.org
> http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/tilesathome
>
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