This email is announcing a Bar BoF at the upcoming IETF meeting on the
topic of "location coherence", to be held somewhere in the vicinity of
the GEOPRIV meeting, probably during the lunch break on Wednesday, 24
March. Since the topic is a little peripheral to GEOPRIV, I've also
set up a Google Group for discussions here:
<http://groups.google.com/group/geo-loco>
What I mean by "coherence" is this:
In order for location-based Internet applications to work, there are
several pieces that need to work together, including
-- Positioning sevices
-- Location protocols
-- Location APIs-- Application protocols that use location
Right now, there are many different implementations out there for each
layer in this stack, each with its own set of semantics for location
related concepts -- not just the location that can be expressed (e.g.,
lat/long/accuracy vs. polygons), but also ancillary ideas like types
of location (civic vs geodetic) and supporting information like signal
measurements.
In the spirit of allowing different organizations to add value at
different levels of this stack, while still maintaining
interoperability, it would seem like a good idea to have a coherent
set of semantics for location concepts -- a common data model, if not
common protocols and APIs.
Topics for discussion could include:
-- How can we map out the space of things that exist today?
-- What sorts of location systems would this effort try to encompass?
Protocols and/or APIs? Positioning and/or conveyance?
-- What's the proper venue for this work? GEOPRIV? A new IETF WG?
Somewhere else?
As an example of the sort of thing that might come out of this work, a
colleague and I put together a partial draft looking at mappings
between different location protocols:
<http://tools.ietf.org/html/draft-doran-geopriv-proto-map-01>
Thanks for taking the time to read through this, and I look forward to
some useful discussions next week.
Best,
--Richard
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