CEOS Working Group on Information Systems and Services, WGISS-32, Budapest, September 2011 “Agency” Report Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences Bernd Ritschel GFZ ISDC* Manager and Information Scientist The Electronic Geophysical Year *Information System and Data Center

Satellite Missions Geoscience Projects CHAMP until 09/2010 (GFZ/DLR/CNES) –Global Earth gravity field modeling –Global Earth magnetic field modeling –Weather Forecast and Space Weather GRACE until 2014 (GFZ/NASA/DLR) –Global Earth gravity field –Climate/deep ocean current monitoring TerraSAR-X until 2012 (GFZ/DLR/private) –X-band radar based SAR imagery Tandem-X until 2015 (GFZ/DLR/private) –3D Digital Earth elevation model

Planned Satellite Projects SWARM 2012 – 2016 (GFZ/ESA/DLR) –Global Earth magnetic field modeling –3D Earth crust conductivity –Electric currents in ionosphere MicroGEM (GFZ/TU Berlin/private) –Weather Forecast and Space Weather –Topside ionosphere tomography GRACE-C 2015 – 2020 (DLR/GFZ/NASA) –Gravity field and water storage monitoring EnMAP (GFZ/ESA) –Hyperspectral image data to investigate a wide range of ecosystem parameters CEOS Working Group on Information Systems and Services, WGISS-32, Budapest, September 2011

The 2007 International Geohazards Week, Frascati, Italy, 5-9 November 2007 GFZ ISDC* Portal Homepage: *Information System and Data Center GGP Superconducting Gravimeter Station Network

ISDC Data and Users 289 product types from different geoscience domains –113 product types for public use –4 product types with grants for science teams –180 internal product types 16,01 Terra Byte of data 27,08 Million products files/day data flow 2900 national and international users and user groups 19 data provider (scientific groups) GFZ/JPL/UCAR/CSR CEOS Working Group on Information Systems and Services, WGISS-32, Budapest, September 2011

WWW => Semantic Web World Wide Web –about documents –HTML pages –URL links –Hypertext service –HTTP protocol –Anybody can say Anything about Any topic, Anywhere and at Any time (AAA + AA) –Open World assumption –Non-unique names Semantic Web –about data based on WWW

Semantic Web News Search Engines Google,, Yahoo and & Bing “start” using Semantic Web technology –support semantic information in HTML pages using microdata (format) –provide and interpret “schema.org” ontology and vocabulary data –ranking depends on use of semantic annotations (normally up to 300 and even more signals are used in the secret ranking algorithms) –Schema.org ontology can be used in order to describe the provider of products, the description of products and the placement of products after searching CEOS Working Group on Information Systems and Services, WGISS-32, Budapest, September 2011

Linked Data Cloud CEOS Working Group on Information Systems and Services, WGISS-30, Montreal, September

Linked Data Linked Data: Linked Data is about using the Web to connect related structured* data for automatic access and processing* Wikipedia: Linked Data is "a term used to describe a recommended best practice for exposing, sharing, and connecting pieces of data, information, and knowledge on the Semantic Web using URIs and RDF.“datainformationknowledgeURIsRDF *added by B. Ritschel CEOS Working Group on Information Systems and Services, WGISS-32, Budapest, September 2011

DBpedia <= Wikipedia

Data Hub: DBpedia

Linked Data and Earth/Geo- … NASA (Data Incubator) World Factbook (CIA) Geo Names Geo Species Taxon Concept Geo Linked Data Linked Sensor Data GeoWordNet Linked GeoData Ocean Drilling Codices Yahoo! Geo Planet GEMET

Data Hub: NASA (Data Incubator)

Data Hub: GeoNames CEOS Working Group on Information Systems and Services, WGISS-32, Budapest, September 2011

Data Hub: Geoplanet CEOS Working Group on Information Systems and Services, WGISS-32, Budapest, September 2011

Data Hub: Linked Sensor Data (Kno.e.sis*) *Center in the College of Engineering and Computer Science at Wright State University *Center in the College of Engineering and Computer Science at Wright State University

Linked Sensor Data (N3 wgs84:. Station: KLCK,Rickenbacker Air National Guard Base, , LinkedSensorData is an RDF dataset containing descriptions of ~20,000 weather stations in the US. There are about five sensors per weather station measuring temperature, visibility, precipitation, pressure, wind speed, humidity, … CEOS Working Group on Information Systems and Services, WGISS-32, Budapest, September 2011

Linked Sensor Data (N3 Format) sens-obs:point_KLCK a wgs84:Point ; wgs84:alt "745"^^xsd:float ; wgs84:lat " "^^xsd:float ; wgs84:long " "^^xsd:float. sens-obs:System_KLCK a om-owl:System ; om-owl:ID "KLCK" ; om-owl:hasLocatedNearRel sens-obs:LocatedNearRelKLCK ; om-owl:hasSourceURI ; om-owl:parameter weather:_WindDirection, weather:_RelativeHumidity, weather:_DewPoint, weather:_AirTemperature, weather:_WindSpeed, weather:_WindGust, weather:_Visibility ; om-owl:processLocation sens-obs:point_KLCK. sens-obs:LocatedNearRelKLCK a om-owl:LocatedNearRel ; om-owl:distance "0.5693"^^xsd:float ; om-owl:hasLocation ; om-owl:uom weather:miles. CEOS Working Group on Information Systems and Services, WGISS-32, Budapest, September 2011

Linked Observation Data rdf:. Station: KLCK,Rickenbacker Air National Guard Base, , LinkedObservationData is an RDF dataset containing descriptions of hurricane and blizzard observations in the US.

Linked Observation Data (N3) sens-obs:MeasureData_WindGust_KLCK_2009_9_19_0_15_00 a om-owl:MeasureData ; om-owl:floatValue "0.0"^^xsd:float ; om-owl:uom weather:milesPerHour. sens-obs:MeasureData_WindDirection_KLCK_2009_9_19_13_55_00 a om-owl:MeasureData ; om-owl:floatValue "30.0"^^xsd:float ; om-owl:uom weather:degrees. sens-obs:MeasureData_AirTemperature_KLCK_2009_9_19_4_55_00 a om-owl:MeasureData ; om-owl:floatValue "59.7"^^xsd:float ; om-owl:uom weather:fahrenheit. sens-obs:Instant_2009_9_19_14_35_00 a owl-time:Instant ; owl-time:inXSDDateTime " T14:35:00-04:00^^ CEOS Working Group on Information Systems and Services, WGISS-32, Budapest, September 2011

Use Linked (Open) Data Standardized semantic based way in order to Present data and information models on the Web –URI referenced RDF data and RDFS/OWL models Understand data/Information models Network data and information models accross the Web Reuse data and models (DC, FOAF, …) Query data (SPARQL) Inference (OWL presented) data and information CEOS Working Group on Information Systems and Services, WGISS-30, Montreal, September 2010

Einsteinturm (1921) Thank you, Questions?

FAQ: What is Linked Data? The Web enables us to link related documents. Similarly it enables us to link related data. The term Linked Data refers to a set of best practices for publishing and connecting structured data on the Web. Key technologies that support Linked Data are –URIs (a generic means to identify entities or concepts in the world), –HTTP (a simple yet universal mechanism for retrieving resources, or descriptions of resources), and –RDF (a generic graph-based data model with which to structure and link data that describes things in the world). (Contributor: Tom Heath, including excerpts from Bizer, Heath and Berners-Lee (2009) (PDF))Bizer, Heath and Berners-Lee (2009) (Contributor: Tom Heath, including excerpts from Bizer, Heath and Berners-Lee (2009) (PDF))Bizer, Heath and Berners-Lee (2009) CEOS Working Group on Information Systems and Services, WGISS-32, Budapest, September 2011