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[mkgmap-dev] Problem with splitter

From aighes osm at aighes.de on Tue Mar 13 15:30:22 GMT 2012

Maybe splitter could detect, if a tile is completely inside such a 
"polygon" and then only add a rectangle with a negative ID (or parse for 
highest used node/way-ID).

At all I think, that needed diskspace isn't a huge problem, if there is 
no more guessing.


Am 13.03.2012 16:06, schrieb Thorsten Kukuk:
> Hi Gerd,
> On Tue, Mar 13, Gerd Petermann wrote:
>>> I'm not that sure option 2 will really blow up the tile size and
>>> CPU cost. Today, most people creating a map use a very huge number
>>> for --overlap to avoid this kind of problems. And how many multipolygons
>>> are really that big that they go over several tiles?
>> I fear the administrative boundaries and coastlines.
> You are right, this could become a real problem :(
> I think the coastlines are already incomplete for europe if you
> don't work on the planet file. Since they are no longer closed,
> would they really end in every tile?
> Of course if you have an extract for great britain, or even
> more worse, for complete north america. Especially in the last
> case, you will have about 1500 tiles all containing the boundaries
> and the coastline.
> Maybe the solution would be to merge mkgmap and tilesplitter
> and do the split on the processed mkgmap data. But I don't
> know enough about how this works to know if this is doable
> at all.
>    Thorsten

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