1 Community Ontologies for Earth System Science Rob Raskin NASA/Jet Propulsion Laboratory Pasadena, CA April 3, 2008.

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Presentation transcript:

1 Community Ontologies for Earth System Science Rob Raskin NASA/Jet Propulsion Laboratory Pasadena, CA April 3, 2008

2 Semantic Web for Earth and Environmental Terminology (SWEET) Concept space written in OWL Initial focus to assist search for data resources Funded by NASA Later focus to serve as community standard for Earth system science Enables scalable classification of concepts

3 Non-Living Substances Living Substances Physical Processes Earth Realm Physical Properties Time Natural Phenomena Human Activities Integrative Ontologies Space Data Faceted Ontologies Units Numerics SWEET 1.0 Ontologies

4 SWEET 2.0 Modular Design Math Science Geoscience Processes Geophysical Phenomena Applications importation

5 SWEET 2.0 Ontologies

6 SWEET Numerical Ontologies Intervals, numeric relations ( ) Cartesian products Functions, derivatives Fuzzy concepts near Spatial concepts 0-D, 1-D, 2-D, and 3-D objects Coordinate systems Above, inside, etc. Temporal concepts Instant, durations, geological time scales

7 SWEET Data Ontology Dataset characteristics Format, data model, dimensions, … Provenance Source, processing history, … Parameters Scale factors, offsets, … Data services Subsetting, reprojection, … Quality measures Special values Missing, land, sea, ice,...

8 PlanetOnt.org

9 Resources SWEET Ontology development/sharing site Noesis (search tool)