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MIT Media lab
Masters candidate, Matthew Mankin's Masters thesis, 'Location
Linked Information ' [pdf]
a very well thought out demonstration of an architecture for
ubiquitious information services based on xml streams within emerging
IETF standard Jabber protocols. Server cells cover explicit
areas, but users are authenticated at, and all infomation is routed
through 'Home' servers thereby offering some privacy protection. Since
the information distribution model is publish-subscribe, potential
spammers can only pollute their own servers. There's an interesting
community filtering capability too.
The paper is also an excellent review of
relevant literature and related projects. Theres' a lot to read
here. More details are available on Matthew's website,
and if you are interested, you
can download his LLI Jabber Component (Tim
Berners-Lee is Mankins advisor.)
Very Highly recommended.
Here's Matthew's' summary of his work:
- Location Linked
(LLI) is a project that attempts to merge virtual spaces and
communities, such as those that reside on the Internet and in
traditional databases, with the physical world, the world of atoms.
LLI uses geography, measured in degrees latitude and longitude as
the primary key linking the two realms.
is similar to augmented reality systems which overlay digital
information on top of the physical world. Whereas augmented reality
systems typically concentrate on solving the user interface problem,
LLI attempts to solve the data access and search infrastructure issues.
In LLI users navigate the physical world with a variety of XML-speaking
devices, discovering and leaving "handles" to information nuggets.
- A distributed network of databases manage the
nugget pointers which are URLs to actual information. Information
nuggets themselves are position/time/url tuples that lead the viewer to
further sources of data.
- People use client devices to peer into the virtual
around them. Client devices can come in many different form factors and
be specialized for finding particular types of information.
- LLI clients integrate position sensing (currently
Internet access (GPRS/CDPD), and a browser user interface.
- The LLI system uses the Jabber
protocol to tie together devices across the earth. Clients communicate
with trusted "home servers" via Jabber encoded XML Streams. Relaying
through a home server (such as is done currently with email) provides
users with a more anonymous location browsing environment.
- LLI clients search for information via the Jabber
discovery protocol, which relays search requests to other servers
across the Internet.
- In LLI, the world has been divided up into
based cells. Location-keyed data nuggets are then published to
- Applications that can take advantage of this system
both those that wish to permanently tag an area (static nuggets), as
well as dynamic object presences (dynamic nuggets). Dynamic systems
could be used for vehicle tracking (air,car,boat,etc.), friend
tracking, or on anything else that moves. :)
Please direct flames, comments,
suggestions to email@example.com
Jams at Foo Camp
Web Map Interop?
Dataland - 1977
User-Centric Map Design?
Google Location Search
OGC & Java
Real Spatial Spammers?
in New York
Cool Spatial Blogs
Geo Metadata Pollution
Euro Cartos and
Harvey Lehtman's Hits
Digital Topo Reviews
Web Map Development
Tom Kalil's Picks
Cool Geo Aps from the CC
RFID Tracking Maps
and GPS Games
Espresso, No Wireless
Radio Frequency Fog
RFID Trees On the Web
KPIG on starhill