[Tilesathome] Tackling the Z12 tile enclosed by landuse issue

[80n]

One way of looking at the problem is to consider it as a consequence of the
practical limitation of the api, that it will only serve up results for a
limited size bbox.  If we could download a large enough bbox then the
problem would go away.

Since osmxapi doesn't have this limitation I'm wondering if it would be
feasible to download some selected ways (landuse=forest, etc) from osmxapi
[1] for a much larger area.  These could then be merged with the z12 data
from the main api.

This would work in principle, but I'm not sure of the consequences for
inkscape (or batik) if the source svg covers a much larger extent, even
though the same area would get rendered.  Anyone have a hunch about the
impact?

80n

[1] osmxapi is using hourly diffs for updates and so is currently no more
than 90 minutes older than the main database at any time.  This should be
current enough I think.


On Dec 19, 2007 4:40 AM, Brent Easton <b.easton at exemail.com.au> wrote:

> Have been thinking about solving the problem where a zoom level 12 tile is
> completely enclosed within a large landuse=forest area. Currently, the
> forest is not renderered. Interested in ideas to approach this.
>
> So far I have come up with:
>
> 1. Use a relation type=enclosed to connect any node or way within  the
> tile (role=within) to the enclosing landuse (role=enclosing). Change the
> data download to download the enclosing landuse whenever the enclosed
> relation is downloaded.
>
> Pros: Simple, easy to implement. Good for smaller enclosing areas. Can be
> maintained using JOSM
> Cons: Will be clumsy for large enclosing forests.
>
> 2. Expand the current oceantiles process from just water/land to include
> other landuse types using other colors as needed.
>
> Pros: Easier to maintain (for people who can cope with png2tileinfo)
> Cons: Hard to maintain (for people who cannot cope with png2tileinfo).
> More work to implement.
>
>
> Comments appreciated.
>
> Regards,
> Brent.
>
>
> ____________________________________________________________
> Brent Easton
> Analyst/Programmer
> University of Western Sydney
> Email: b.easton at uws.edu.au
>
>
> _______________________________________________
> Tilesathome mailing list
> Tilesathome at openstreetmap.org
> http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/tilesathome
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstreetmap.org/pipermail/tilesathome/attachments/20071219/d81c756c/attachment.html>