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DIAL Update

104

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  • 1. DIAL Update Doug Ilg Raytheon ITSS Doug.Ilg@gsfc.nasa.gov HDF-EOS Workshop III September 14, 1999
  • 2. Background • NRC report recommended broader distribution of EOSDIS functionality • Small scale data producers wanted easy-touse, yet powerful data distribution method • Many data producers have very tiny budgets
  • 3. Basic Design Goals • A turn-key data distribution system that: – Promotes EOSDIS standards – Administrator • Low (no) cost • No licensing difficulties • Easy maintenance – User • • • • Easy to use Catalog search Dynamic browsing Easy data retrieval
  • 4. Building Blocks • Public domain, off-the-shelf (PDOTS) components – Apache WWW server – NCSA Scientific Data Browser • Custom CGI – – – – Search engine with HTML and Java interfaces Basic visualization for browse purposes Home grown “database” JDBC interface • Free Web browsers
  • 5. “Classic” Features • Hybrid interface including HTML, Java, JavaScript • Simple, configurable metadata search – Spatial/temporal/other • Basic visualization of HDF and HDF-EOS files – HTML for structural information – GIF for browse imagery • Immediate data download – HDF/ASCII/binary • Inventory support – Custom “flat file” – JDBC
  • 6. “New” Features • • • • • Animation Coastline and political boundary overlays Color compositing for multi-band images Cross-granule subsetting and subsampling Support for Version 0 protocol
  • 7. V0 Interoperability Results • Very successful demonstration at GOIN99 • Used as basis for ESIP Federation “cluster” • Accepted as component of “System Wide Interface Layer” for Federation • Remaining problems: – V0 is only supported on Sun and SGI – Seen as old technology – CIP is still in flux
  • 8. SEARCH HTTP V0 CIP - in place - in place - planned DATA HTTP - in place HTTP dialog Earth Data Gateway Web Browser V0 dialog CIP Retrieval Manager CIP dialog Data Granules HTTP V0 CIP internal CGI dialogs JDBC Catalog Database Catalog Flat File
  • 9. LEGEND Peer-to-Peer RM Dialog Subordinate RM Dialog Client Dialog Retrieval Manager (global node) Retrieval Manager (global node) CIP Catalog CIP Catalog CIP Catalog Retrieval Manager (global node) Retrieval Manager (global node) CIP Catalog Retrieval Manager CIP Catalog CIP Catalog
  • 10. LEGEND Peer-to-Peer RM Dialog Subordinate RM Dialog Client Dialog Retrieval Manager (global node) Retrieval Manager (global node) CIP Catalog CIP Catalog CIP Catalog Retrieval Manager (global node) Retrieval Manager (global node) CIP Catalog Retrieval Manager CIP Catalog CIP Catalog

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