[Tilesathome] multipolygon rendering problems

[Dirk-Lüder Kreie]

Am 02.07.2010 03:40, schrieb Matthias Julius:
> Dirk-Lüder Kreie <osm-list at deelkar.net> writes:
>> The TRAPI servers cannot do this, by design. The client already has
>> dupemerging code for osm files, so the client could theoretically check
>> for incomplete relations of the type multipolygon and re-fetch those
>> from XAPI.
> 
> I thought so, too.  Do you think it might be a problem when TRAPI and
> XAPI are slightly out of sync?

That depends on the type of desync.

It could even be that we fetch the area from XAPI, then the client
detects the incomplete Multipolygon, and downloads that, but in the
meantime the same XAPI has been updated.

Generally it depends on which version of the referenced objects the
dupe-merging code will preserve.

referenced objects added or deleted should not be a problem.
moved nodes could be a problem, if there were significant changes.
changed tags on referred objects could lead to problems like duplicate
rendering of labels.

All in all I would say minor stuff compared to the original problem.

-- 

Dirk-Lüder "Deelkar" Kreie
Bremen - 53.0901°N 8.7868°E

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