[mkgmap-dev] splitter maximum tile size

Wed Dec 5 11:07:59 GMT 2012

On Wed, Dec 05, GerdP wrote:

> Thorsten Kukuk wrote

> > Yes, I think the problem is if you cross 180. Maybe if the data is
> > going from ~-180 to ~180, we should check what the latest node from
> > the right is, and what the latest node from the left is, and exclude
> > the empty middle?
> 
> I thought the same and coded that before, but the problem would be the 
> same if you use a polygon containing e.g. all countries using french as the 
> national language.
> I think it  is not good enough to creae two distinct areas if the original
> polygon
> contained more than two, and guessing the original polygon is not trivial,
> esp. not
> if it contains small areas around islands.

Ok, but I can create the problem with only _one_ polygone, which
contains only Alaska, too.
The problem is if a polygone has to cross -180/180 longitude.
Ok, due to the design, it will always be two polygons ...

  Thorsten

-- 
Thorsten Kukuk, Project Manager/Release Manager SLES
SUSE LINUX Products GmbH, Maxfeldstr. 5, D-90409 Nuernberg
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