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Introduction and Overview Of GALEON IE September 12, 2005 Osamu Ochiai - JAXA

Introduction and Overview Of GALEON IE September 12, 2005 Osamu Ochiai - JAXA Ben Burford - JAXA/RESTEC. GALEON IE (Geo-interface for Air, Land, Earth, Oceans NetCDF) Interoperability Experiment. Ben Domenico/UCAR George Percivall/OGC.

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Introduction and Overview Of GALEON IE September 12, 2005 Osamu Ochiai - JAXA

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  1. Introduction and Overview Of GALEON IE September 12, 2005 Osamu Ochiai - JAXA Ben Burford - JAXA/RESTEC CEOS WGISS 20, Kyev, September 12-16, 2005

  2. GALEON IE(Geo-interface for Air, Land, Earth, Oceans NetCDF)Interoperability Experiment Ben Domenico/UCAR George Percivall/OGC Support open access to atmospheric and oceanographic data. CEOS WGISS 20, Kyev, September 12-16, 2005

  3. Main Gateway Objectives • Investigate the feasibility of adapting data and metadata originating from OPeNDAP and THREDDS servers to the WCS specifications • To bridge the gap between the climate research and GIS communities • Allow traditional GIS clients to access netCDF/OPeNDAP datasets via standards-based interface – “WCS-THREDDS Gateway” CEOS WGISS 20, Kyev, September 12-16, 2005

  4. WCS capabilities WCS description OPeNDAP NetCDF dataset THREDDS interface THREDDS interface WCS Client NcMLGML getCapabilities getCoverage geoTIFF netCDF describeCoverage WCS coverage GMLgenerator NetCDF geoTIFFgenerator NcML-G metadata THREDDS catalogs OPeNDAP THREDDS catalogs enhanced with NcML-GML NetCDF/OPeNDAP data server netCDF objects THREDDS enhanced catalog generation tools … CEOS WGISS 20, Kyev, September 12-16, 2005

  5. NcML-GML ver. 0.5 • A Mediation Markup Language between ncML and GML • An extension of ncML (netCDF Markup Language) based on GML grammar • Why? – Because NcML (i.e. netCDF) and GML semantics are not completely interoperable • To keep ncML and GML loosely coupled • NcML must be free to change without any direct effect on GML, and vice versa. • WCS-THREDDS server • Gateway between UNIDATA THREDDS and OGC-WCS CEOS WGISS 20, Kyev, September 12-16, 2005

  6. AS GIS AS and GIS domains • Historical differences: CEOS WGISS 20, Kyev, September 12-16, 2005

  7. AS GIS Interoperability issue Abstract model level Multi-dimensional arrays Coverage Content model level netCDF + Conventions OGC/ISO Coverage metadata GML netCDF encodings Encoding level CEOS WGISS 20, Kyev, September 12-16, 2005

  8. Model mediation approach • To experiment effective solutions to mediate AS and GIS data models netCDF Data Model THREDDS Data Model ncML-G Data Model ncML-GML Data Model WCS 1.x Data Model GML 3.x Data Model ISO 191xx Model Models Mediation Earth Sciences Information Community GIS (Geospatial) Information Community CEOS WGISS 20, Kyev, September 12-16, 2005

  9. AS GIS Interoperability Experiment Abstract model level ncML-GML abstract model Content model level ncML-GML content model ncML-GML Encoding level CEOS WGISS 20, Kyev, September 12-16, 2005

  10. Participants • Unidata/UCAR* (Ben Domenico) • University of Florence* • NASA Geospatial Interoperability Office* • George Mason University (Liping Di) • CadCorp • ESRI • JPL • IMAA-CNR • Interactive Instruments • University of Applied Sciences • International University Bremen • NERC NCAS/British Atmospheric Data Center • University of Alabama Huntsville (Mike Botts) • Research Systems, Inc. (IDL) • Texas A&M University *Initiating institutions CEOS WGISS 20, Kyev, September 12-16, 2005

  11. Non-member Interestin Gateway Implementation • University of Rhode Island (OPeNDAP group)* • Pacific Marine Environment Laboratory (PMEL)* • Center for Land, Ocean, Atmosphere (COLA) • Marine Metadata Initiative lead by MBARI (Monterey Bay Aquarium Research Institute) • GODAE (Global Ocean Data Assimilation Experiment) led by FNMOC (Fleet Numerical Meteorological and Oceanographic Center) • Many current THREDDS/OPeNDAP server sites CEOS WGISS 20, Kyev, September 12-16, 2005

  12. Conclusion:Main Interface Objectives • Evaluate effectiveness of ncML-GML in WCS data encoding… suggest extensions • Evaluate netCDF/OPeNDAP as WCS data transport (encoding) mechanism … suggest extension if warranted • Responsibilities: • UCAR: develop the testbed • OGC: evaluate and update the specifications. CEOS WGISS 20, Kyev, September 12-16, 2005

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