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The Alexandria Digital Earth Prototype System

The Alexandria Digital Earth Prototype System. Terence Smith Greg Janée James Frew Anita Coleman. Goals distributed digital library for geo-referenced information services supporting DL federation and interoperation personalized “learning spaces” large geospatial collections. Activities

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The Alexandria Digital Earth Prototype System

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  1. The Alexandria Digital Earth Prototype System Terence Smith Greg Janée James Frew Anita Coleman

  2. Goals distributed digital library for geo-referenced information services supporting DL federation and interoperation personalized “learning spaces” large geospatial collections Activities Core system Services Metadata Education Evaluation Collections Research ADEPT is …

  3. Architecture Library set of collections client (public) services Collection set of holdings metadata reports library (internal) services Holding unique identifier = distributed catalog system Components Footprints location(s)  holding Gazetteer name  footprint HTTP service  URL(s) Search buckets generic query metadata XML all visible messages queries metadata reports Core System (inherited from ADL)

  4. ADL Services Clients • Configuration {collection-id} • Collection(collection-id) report • Query(query) query-id • Results(query-id) {holding-id} • Metadata(collection-id, holding-id, view) report Libraries • Collection report • Query(query, accumulator) query-thread • Metadata(holding-id, view) report Collections

  5. “Search Buckets”(generic query metadata) Geographic locations Dates Types Formats Originators Subject-related text Assigned terms Identifiers Reports(descriptive metadata) Collection Scan Full New ADEPT/DLESE/NASA standard Browse Access ADL Metadata

  6. Collection discovery Central registry Query by space, time, type resolution-weighted average information density type thesaurus Distribution Peer-to-peer middleware servers heterogeneous collections Dynamic collection linking proxy thru remote middleware Access control remote collection visibility Local collections Dynamic creation, population, management, deletion XSLT(native XML metadata) import from other collection Bucket refinements Metadata  bucket mappings object level: bucket report collection level Common views search description “Drill-down” search statistical guidance Core System: ADEPT extensions

  7. client-side services (Java classes) core functionality access control (service- and collection-level)query fan-out & results mergingquery result rankingresult set caching configuration file server-side interface (Java interfaces) ranking methods access control mechanisms ADEPT Implementation C L I E N T web browser JIGI SDLIP proxy HTTP web intermediary/ XMLHTML converter HTTP transport RMI transport HTTP XML M I D D L E W A R E XML S E R V E R JDBC Bucket99 driver query translator proxy driver RDBMS group driver configuration files, scripts

  8. New clients … • Content rendering • GISviewer (UCB) • TilePix (UCB) • “Digital Earth” navigation • VGIS (Georgia Tech) • TerraVision (SRI) • Knowledge representation • Concept/topic maps (VKB) • Simulation

  9. New library services … • Gazetteer • Remote collections • Collection discovery • Personal collections • Metadata extraction & creation • Reference • Dictionaries • Thesauri • Semantic mapping • Connect same object, different representations • text  location  image  …

  10. Formal model Entry Identifiers Names Footprints Types Relationships current vs. historical primary vs. secondary Query language Entry/relationship constraints Metadata Gazetteer properties Entry Standard Extended Services Capabilities Query Add Relate Remove XML encodings Gazetteer service protocol http://www.alexandria.ucsb.edu/~gjanee/gazetteer

  11. Stuff we’d like to share • Standards and protocols • Library • Collection metadata • Object metadata (joint w/ DLESE, NASA) • Client API • Gazetteer • Content • Client API • Software • “Middleware” (collection  client broker) • portable (Java, Python) servlets

  12. That’s All, Folks!

  13. New connections … • Z39.50 • OAI • SDLIP/GDLIP

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