DIAL Update

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• DIAL Update

Doug Ilg Raytheon ITSS Doug.Ilg_at_gsfc.nasa.gov HD
F-EOS Workshop III September 14, 1999
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Background

• NRC report recommended broader distribution of
  EOSDIS functionality
• Small scale data producers wanted easy-to-use,
  yet powerful data distribution method
• Many data producers have very tiny budgets

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Basic Design Goals

• A turn-key data distribution system that
• Promotes EOSDIS standards

• User
• Easy to use
• Catalog search
• Dynamic browsing
• Easy data retrieval

• Administrator
• Low (no) cost
• No licensing difficulties
• Easy maintenance

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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

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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

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New Features

• Animation
• Coastline and political boundary overlays
• Color compositing for multi-band images
• Cross-granule subsetting and subsampling
• Support for Version 0 protocol

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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

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DIAL Server
Available Protocols
DATA
HTTP - in place
Data Granules
HTTP dialog
HTTP
internal CGI dialogs
Earth Data Gateway
Catalog Database
V0 dialog
V0
JDBC
CIP Retrieval Manager
CIP
CIP dialog
Search
OR
Catalog Flat File
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DIAL Sites in a CIP Based Federation
Retrieval Manager (global node)
Retrieval Manager (global node)
Retrieval Manager (global node)
Retrieval Manager (global node)
CIP Catalog
CIP Catalog
Retrieval Manager
CIP Catalog
CIP Catalog
CIP Catalog
CIP Catalog