[Standards] [mobile] [Fwd: Proposed XMPP Extension: Location Query]

Helge Timenes helge at buddycloud.com
Fri Nov 7 04:54:57 CST 2008


Peter Saint-Andre wrote:
>Simon Tennant wrote:
>> Stephen Pendleton wrote:
>>> Very cool.
>>> Question for the authors: Are you really using arc-minutes as units of the
>>> GPS error or is that carryover from the GEOLOC XEP?
>>
>> Props should go to Helge for the spec. I guess that writing
>> specifications for unmanned aerial vehicles is finally paying off.
>>
>> I presume you are referring to this post:
>> http://mail.jabber.org/pipermail/standards/2008-October/019920.html
>>
>> Arc-minutes are a carry over.  We wrote the spec with XEP-0080 in mind
>> and use that as the format for publishing the derived location to the
>> user's geoloc node too.
>>
>> We would prefer to use accuracy in meters. While arc minutes may make
>> sense in a GPS sense, accuracy often has to be implied when using other
>> location means.
>>
>> For example, if the server is receiving Cell-ID beacons and some of the
>> known beacons are identified as within a city an accuracy of 100m could
>> be implied due to a known higher tower density. Trying to apply
>> arc-minutes to this would probably end up just being clumsy and it would
>> be nice to use the same unit of measurement for accuracy.
>
>So use the new <accuracy/> element, which measures in meters:
>
>http://xmpp.org/extensions/xep-0080.html#format

Sorry for the slow response to this, got bogged down with some home improvement work (no worries, still have all my fingers :-)

I will update to use the <accuracy/> element, and the world will be a better place. 


Helge



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