Rob Raskin NASA/Jet Propulsion Lab sweet.jpl.nasa.gov
Produce a set of ontologies to improve search and usage of NASA Earth system science observational data
Observation Instrument or model Parameter observed (may be multi-valued) Location Time Data parameters
Faceted (normalized) concepts Physical Property (temperature, pressure, …) Substance (air, water, CO2, …) Earth Realm (troposphere, sea surface, tundra, …) Living Thing (leaf, human, …) Process (absorption, diffusion, …) Space (Equator, northward, …) Time Integrative Phenomena (event with space/time extent) Human Activities (carbon emissions, …)
Units Quality Scale/offset Special values Interpretations of ice, sea, clouds, … Range For color bar For valid values
Ontology-aided search Enables results without exact keyword match Any tools built upon OWL
www.PlanetOnt.org collaborative ontology development site to encourage best practices www.PlanetOnt.org Identify dependencies across ontologies and provide RSS feed for notification of changes Don’t reinvent the wheel: All concepts have a characteristic level of abstraction - general concepts should be reused from general ontologies, only specialized concepts need appear in specialized ontologies. Establish consistent usage of OWL Enable easy comparison of existing ontologies Establish SWEET as an upper-level Earth science ontology
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