[OSM-dev] How to use XAPI

80n 80n80n at gmail.com
Sun Aug 15 20:57:57 BST 2010


On Sun, Aug 15, 2010 at 5:01 PM, bernhard zwischenbrugger <
bz at datenkueche.com> wrote:

> Am 15.08.10 17:14, schrieb Roeland Douma:
>
>  You could only allow for the query on high zoom leves. Since what good is
>> an
>> overlay of all restaurants on zoomlevel 11?
>>
>>
>>
> That's the point!
>
> A level 11 restaurant search in Europe does not make much sense.
> But if I plan a bicycle trip in Laos it's very different.
> (I was very hungry in Laos)
>
> For a motorbike trip in Cambodia a level 8 search for
> tourism=hotel|guest_house
> gives usefull informations.
>
> If the querys for low zoomlevels are disabled the tool makes not much
> sense.
> If the querys are not disabled, the db can't handle the querys.
>
> XAPI does not use zoom level as a limit.  Any query is permitted.

There is a limit of 1 million elements for most queries.  There's also some
heuristics which prevent silly queries.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstreetmap.org/pipermail/dev/attachments/20100815/71e1db72/attachment.html>


More information about the dev mailing list