Embed Size (px)
Citation preview
KIT – University of the State of Baden-Württemberg andNational Laboratory of the Helmholtz Association
KARLSRUHE SERVICE RESEARCH INSTITUTE (KSRI)INSTITUTE OF APPLIED INFORMATICS AND FORMAL DESCRIPTION METHODS (AIFB)
www.ksri.kit.edu
SEMANTIC TECHNOLOGIES INSTITUTE (STI)
Leopold-Franzens-Universität Innsbruck
Geospatial Linked Open Services
Barry Norton, Reto Krummenacher
Towards Digital Earth @ FIS2010, September 20, 2010
Karlsruhe Service Research Institute www.ksri.kit.edu
Semantic Technologies Institute www.sti2.at
Geospatial Linked Open ServicesBarry Norton and Reto Krummenacher
20.09.2010
Linked Open Data Cloud 2007
Karlsruhe Service Research Institute www.ksri.kit.edu
Semantic Technologies Institute www.sti2.at
Linked Open Data Cloud 2008
Geospatial Linked Open ServicesBarry Norton and Reto Krummenacher
20.09.2010
Karlsruhe Service Research Institute www.ksri.kit.edu
Semantic Technologies Institute www.sti2.at
Linked Open Data Cloud 2009
Geospatial Linked Open ServicesBarry Norton and Reto Krummenacher
20.09.2010
Karlsruhe Service Research Institute www.ksri.kit.edu
Semantic Technologies Institute www.sti2.at
State of the Art – GeoNames.org
Geospatial Linked Open ServicesBarry Norton and Reto Krummenacher
20.09.2010
Karlsruhe Service Research Institute www.ksri.kit.edu
Semantic Technologies Institute www.sti2.at
State of the Art – GeoNames.org Services
Geospatial Linked Open ServicesBarry Norton and Reto Krummenacher
20.09.2010
Karlsruhe Service Research Institute www.ksri.kit.edu
Semantic Technologies Institute www.sti2.at
State of the Art – GeoNames.org Services
Geospatial Linked Open ServicesBarry Norton and Reto Krummenacher
20.09.2010
Karlsruhe Service Research Institute www.ksri.kit.edu
Semantic Technologies Institute www.sti2.at
State of the Art – GeoNames.org Weather Service
Geospatial Linked Open ServicesBarry Norton and Reto Krummenacher
20.09.2010
Karlsruhe Service Research Institute www.ksri.kit.edu
Semantic Technologies Institute www.sti2.at
State of the Art – GeoNames.org Weather Service
{"weatherObservation": {"clouds":"broken clouds", "weatherCondition":"drizzle", "observation":"LESO 251300Z 03007KT 340V040 CAVOK 23/15 Q1010", "windDirection":30,
Geospatial Linked Open ServicesBarry Norton and Reto Krummenacher
20.09.2010
Karlsruhe Service Research Institute www.ksri.kit.edu
Semantic Technologies Institute www.sti2.at
State of the Art – GeoNames.org Weather Service
{"weatherObservation": {"clouds":"broken clouds", "weatherCondition":"drizzle", "observation":"LESO 251300Z 03007KT 340V040 CAVOK 23/15 Q1010", "windDirection":30, "ICAO":"LESO", ...
Geospatial Linked Open ServicesBarry Norton and Reto Krummenacher
20.09.2010
Karlsruhe Service Research Institute www.ksri.kit.edu
Semantic Technologies Institute www.sti2.at
METAR Ontology
Geospatial Linked Open ServicesBarry Norton and Reto Krummenacher
20.09.2010
Existing METAR Ontology (somewhat outdated)
Karlsruhe Service Research Institute www.ksri.kit.edu
Semantic Technologies Institute www.sti2.at
METAR Ontology
Geospatial Linked Open ServicesBarry Norton and Reto Krummenacher
20.09.2010
Existing METAR Ontology (somewhat outdated)
Karlsruhe Service Research Institute www.ksri.kit.edu
Semantic Technologies Institute www.sti2.at
Geonames Airports
Geospatial Linked Open ServicesBarry Norton and Reto Krummenacher
20.09.2010
‘alternateName’ for both labels and identification schemes (ICAO, IATA)
Only ~100 resources
WGS84 geospatial, but only lat/long (not alt)
Karlsruhe Service Research Institute www.ksri.kit.edu
Semantic Technologies Institute www.sti2.at
DBPedia Airports
Geospatial Linked Open ServicesBarry Norton and Reto Krummenacher
20.09.2010
Some ICAO, IATA (with specific properties) but noisy Some WGS84, but
not consistently
~3500 verifiable airports (see next)
Karlsruhe Service Research Institute www.ksri.kit.edu
Semantic Technologies Institute www.sti2.at
NCAR METAR Station List
Geospatial Linked Open ServicesBarry Norton and Reto Krummenacher
20.09.2010
~8500 airports and other METAR reporting stations
Karlsruhe Service Research Institute www.ksri.kit.edu
Semantic Technologies Institute www.sti2.at
LOS METAR Data
Geospatial Linked Open ServicesBarry Norton and Reto Krummenacher
20.09.2010
Uniform WGS84 lat/long/alt
ICAO and IATA-based URIs plus skos:notation to originals
owl:sameAs• between
ICAO/IATA• to Geonames
(108)• to DBPedia (1159)http://www.linkedopenservices.org/data/METARStations.rdf.xml
Karlsruhe Service Research Institute www.ksri.kit.edu
Semantic Technologies Institute www.sti2.at
LOS Weather Service
Geospatial Linked Open ServicesBarry Norton and Reto Krummenacher
20.09.2010
Karlsruhe Service Research Institute www.ksri.kit.edu
Semantic Technologies Institute www.sti2.at
LOS Geo Resources
Geospatial Linked Open ServicesBarry Norton and Reto Krummenacher
20.09.2010
Karlsruhe Service Research Institute www.ksri.kit.edu
Semantic Technologies Institute www.sti2.at
Resource-Based Linked Open Services
GETAccept: text/html
303 REDIRECT /page
GETAccept: application/rdf+xml (or text/n3)
303 REDIRECT /data Link
ed
Dat
aLi
nked
S
ervi
ce
GET /weatherAccept: application/rdf+xml(or text/n3)
200 <rdf:Description>
Geospatial Linked Open ServicesBarry Norton and Reto Krummenacher
20.09.2010
Karlsruhe Service Research Institute www.ksri.kit.edu
Semantic Technologies Institute www.sti2.at
Conclusion
We offer the following principles to guide the formation of Linked Open Services:1. Describe services as LOD prosumers
with input and output descriptions as SPARQL graph patterns
2. Communicate RDF by RESTful content negotiation
3. Communicate and describe the knowledge contribution resulting from service interaction, including implicit knowledge relating input, output and service provider
Associated with the last principle is an optional fourth:4. When wrapping non-LOS services, extend the (lifted, if non-RDF)
message to make explicit the implicit knowledge, and to use Linked Data vocabularies, using SPARQL CONSTRUCT queries
We have produced, hand-in-hand, a new dataset for LOD and several services of this form
