The document describes DataFed, a federated data system that provides non-intrusive integration of diverse environmental datasets using open standards. DataFed allows users to find and access datasets through a catalog and flexible tools for processing and visualizing the data. It facilitates publishing, finding, and accessing geospatial and environmental data through loose coupling of autonomous nodes and OGC web service protocols.

1. The Federated Data System DataFed
2001-2006 NSF, NASA, EPA
Non-intrusive data integration infrastructure
Standards-based data access
Catalog of federated datasets
For finding and accessing datasets
Flexible processing tools
Based on web-service workflow orchestration
2006 – 2011 NASA, EPA, ESIP
Same as above – Transition to GEOSS
User & GEOSS; AIP 1,2,3; GCI; AQ Co
2011 – 2015 ?? ?? ??
Data network for AQ Decisions & Sci by 2015?
DataFed: A Client & Server Node in ADN

2. OGC W*S Standard Lose Coupling through
Wen Service Protocol
OGC WCS Data Access Protocol
Provides SOA for Lose Coupling for Autonomous Nodes
Facilitates Publishing, Finding and Accessing Data

3. Application of OGC WCS Data Access Protocol
Grid Image Station Data
Parameter Bounding Box Time Range Out Format
Coverage=THEEDDS.T& BBOX=-126,24,-65,52,0,0 &TIME=2002-07-07/2002-07-07 &FORMAT=NetCDF
Coverage=SEAW.Refl& BBOX=-126,24,-65,52,0,0 &TIME=2002-07-07/2002-07-07 &FORMAT=GeoTIFF
Coverage=SURF.Bext& BBOX=-126,24,-65,52,0,0 &TIME=2002-07-07/2002-07-07 &FORMAT=NetCDF-table
Regardless of the data location, data type and format,
• the parameter-space-time query is the same
• the return is in user selectable format from the offerings

5. DataFed Tools - Subset
Consoles: Data from diverse sources
are displayed to create a rich context
for exploration and analysis
Viewer: General purpose spatio-temporal
data browser and view editor applicable CATT: Combined Aerosol Trajectory
for all DataFed datasets Tool for the browsing backtrajectories
for specified chemical conditions

7. The Information Interoperability Stack

8. Screencast: Info System Screencast

9. Flow of Data and Usage Control
Obs. & Models Decision Support System
Std. Interface
Std. Interface
Control
Data Reports
Data Sharing Gen. Processing Domain Processing Reporting
Requesting Information User User
Sensors Control Programs Agencies
Info System
Negotiating Space NAAQS
SIPs
Data Forecast
GEOSS
Providing Information …
Acquisition
processing