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DLESE and NSDL

DLESE and NSDL. The role of the Digital Library for Earth System Education* (DLESE) in the National SMETE Digital Library Presented by Dave Fulker Director of the Unidata Program Center University Corporation for Atmospheric Research Boulder, Colorado

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DLESE and NSDL

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  1. DLESE and NSDL The role of the Digital Library for Earth System Education* (DLESE)in the National SMETE Digital Library Presented by Dave FulkerDirector of the Unidata Program CenterUniversity Corporation for Atmospheric ResearchBoulder, Colorado *DLESE is funded jointly by the GEO & EHR Directorates of the NSF

  2. Two Emphases for this Talk 1. Sketching one of DLESE’s contributions to the nascent NSDL initiative so far: • Building community foundations • (Skipping other efforts by DLESE & partners) • Cataloging methodologies & tools • Sharable middleware to support interoperability... 2. Sketching a role DLESE is positioned to play: enabling data access & discovery in NSDL • Relevant data should be easy to find • Data found should be easy to use & understand www.DLESE.org

  3. All hands meeting Attendees from all 42 of the funded projects Posters, brainstorming... Election of an NSDL Coordinating Committee Formation of workgroups, active in planning NSDL Individual workgroup reports Guidance on Core Integration functionality for NSDL Overarching white paper, see:http://www.smete.org/nsdl/workgroups/coordcomm/ 7 Workgroups Governance Community, Education, & Pedagogy Collections Standards Services Evaluation Technical Infrastructure Community Foundations for NSDL www.DLESE.org

  4. referenced items & collections referenced items & collections Referenced Items & Collections Portals & Clients Portals & Clients Portals & Clients NSDL Services NSDL Services Other NSDL Services NSDL Collections NSDL Collections NSDL Collections Core Services: annotation CI Services query transform CI Services topic-map registry Core Services: harvesting CI Services personalization Core Collection- Building Services persistence CI Services discussion Core Collection- Building Services protocol mediation CI Services visualization... NSDL Information ArchitectureDeveloped by the Technical Infrastructure Workgroup User Interfaces CoreNSDL “Bus” Usage Enhancement Collection Building

  5. Enabling Data Access & Discovery in NSDL(reflecting the convergence of needs from two worlds) • In the digital libraries world, science educators expect to find & to use (unfamiliar) data/images meaningfully • Tools are envisioned that will help • Integrate/visualize complex data/images from diverse sources • Handle geo-referencing, resampling, units of measure... • But data/tool classification is an unsolved problem • In the scientific data management world • One can publish data/images almost as easily as text, & one can access remote data as easily as local data • But it is hard to find data & match them to the tool at hand... • Common need: discovery systems & rich metadata • Embracing discipline-specific data semantics • Supporting the use of powerful software tools (GIS...) www.DLESE.org

  6. A Dilemma: Who Performs the Work? • Data providers can’t meet all needs • Providers perceive little benefit from the work of adding metadata • Meaning is always problem-specific, so complete semantic metadata is impossible • Granularity requirements also are problem-specific • Data users typically lack expertise/time to • Form suitable units of information • Aggregations of multiple files (time series, e.g.) • Subsets (sub-samplings of specified variables, e.g.) • Acquire metadata needed for tools & understanding www.DLESE.org

  7. Idea: 3rd Party Metadata Publication • Publishable Inventories & Catalogs (PICats) could be built anywhere using XML • To create “virtual aggregations” of data sets • To characterize data sets in meaningful ways(including metadata needed by applications) • Data providers would see reduced demands for filling user-specific requests • Data users would gain new views of data • Relating them to specific (educational) contexts • Facilitating their use in familiar software tools www.DLESE.org

  8. referenced items & collections referenced items & collections 3rd Party PICats NSDL Services NSDL Services Other Data Services: modeling, etc. NSDL Collections NSDL Collections DODS- Accessible Data Sets PICat Consistency with NSDL Architecture Web Browser User Interfaces Data Analysis Application CoreNSDL “Bus” Usage Enhancement Collection Building Core Services: visualization A Core Service: PICat harvesting See Java Demo

  9. Example of a (Prototype) PICatNote: XML => ease of inclusion in digital libraries... <catalog> <server type="DODS" ID="LocalDataSets" url="file:///C:/J/DataSets/"/> <server type="DODS" ID="NCAR" url="http://motherlode.ucar.edu/... <collection name="Data for CNI Demo"> <dataset name="Atmospheric State over US, 21h UT, 30-Mar-2001" server="LocalDataSets" urlPath="2001033021_ruc.nc"/> <dataset name="Aviation Model (remote) 12h UT, 05-Apr-2001" server="NCAR" urlPath="dods/model/2001040512_avn-q.nc"/> </collection> </catalog> www.DLESE.org

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