[OSM-talk] Why isn't any XAPI server available ?

Maarten Deen mdeen at xs4all.nl
Sat Feb 19 17:00:27 GMT 2011


Patrick Kilian wrote:
> Hi,
> 
>> For simple map calls there is TRAPI[1]. As far as  I know, TRAPI performs
>> much better on map (bbox) queries than either the main-API, XAPI or ROMA (on
>> equivalent hardware). Rather than using a database, I think it used a
>> pre-tiled file structure, so that it simple needs to peace together a bunch
>> of tiles, rather than do a full search in a db, which massively reduced the
>> disk seeks necessary.
> You point out several points which are correct but not very well known.
> TRAPI exists, feeds the tiles at home clients, uses a pre-tiled structure
> directly in the file system and is rather fast. Not clue why it is
> ignored so often.

Well, for one thing it does not do element predicates, and it only gives small 
areas.

Regards,
Maarten



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