Navigation¶

• Main Page
  

• Random Page
• Create a new Page
• All Pages
• Categories
  

• Administration
• File Management
  

• Login/Logout
• Language Selection
• Your Profile
• Create Account
  

HIS Central - Notes on Hydrologic Metadata Center

Notes on HIS Data Services Center ¶

What is Hydrologic Metadata¶

• Observations metadata (observations catalogs)
• References to spatial data sources
• References to web services related to hydrologic data
• Storage of composite objects
• Ontologies and controlled vocabularies
  

Functionality¶

• Registration, upload, crawling
  • Registration of services (a preliminary description is at the Central HIS pages)
  • Upload of ODM, and virtual servers for ODMs
  • Eventually: upload of netCDFs, an THREDDS servers
  • Harvesting catalogs from registered services
  • Syncing with catalogs in HIS Servers
    

• Data discovery system
  • Global search (Hydroseek)
  • Finding data, and passing discovery requests to lower-level HIS servers
  • Analysis of data availability with data cubes (data cubes constructed for federal agencies, and for watersheds on demnand)
    

• Maintenance and updates
  • Periodic updates of agency catalogs
  • Ontology management
  • Controlled vocabulary management system
  • Tagging of variables with ontology
  • Management of GUIDs
  • Maintaining framework datasets
  • Provenance management
  • Virtual servers for submitted ODMs and gridded data
  • Monitoring of hydrology data resources (e.g. "hot page"/"hot map" for registered HIS servers)
    

• Interoperability
  • Standards support
  • Standards for data discovery
  • Interfaces to other metadata stores, in other disciplines (wrapping search services of other portals)
  • Search across portals
  • Research on interoperability across hydrologic and related datasets; eventually support for ETL tools
    

• Export
  • Export in different metadata formats
  • Maintaining extract services
  • Conversion services
    

• Long-term preservation of catalogs and framework data
  • A synopsis of long term preservation issues for observational data, from Nov 2007
    

• Usage reporting
  • Maintaining logs, reports on demand and periodically
    

• Support for metadata center users
  • Periodic workshops, tutorials, wiki
  • preliminary notes on CUAHSI HIS support needs, from Feb 2007
    

• Organizational issues
  • needed skills: server maintenance; software packaging; data and metadata curation; CVS maintenance
  • MOUs with other data centers