http://capitawiki.wustl.edu/index.php/20060111_Air_Quality_Cluster_Tech:_Data_Flow_%26_Interoperability_in_DataFed_Service-based_AQ_Analysis_System

2. Federated Network for Air Quality Data and Processing Services Project Team: Software Architecture: R. Husar Software Implementation: K. Höijärvi Data and Applications: S. Falke, R. Husar The DataFed Project

3. DataFed in a Nutshell DataFed Vision Aid air quality analysis by effective use of relevant data DataFed Goals Facilitate access and flow of AQ data from provider to users Support user-driven data processing value chains Participate in specific application projects Approach: Mediation Between Users and Data Providers DataFed assumes spontaneous, autonomous data providers Non-intrusively wraps datasets for access by web services Mediates, homogenizes data views. e.g. geo-spatial, time... Applications Browsers and analysis tools for distributed monitoring data Serve as data gateway for user programs; GIS, science tools DataFed is focused on the mediation of air quality data

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

5. Web Services: Building Blocks of DataFed Programming Access, Process, Render Data by Service Chaining [Station] [Monitor] Clickable monitor locations layer Map boundary layer

8. Earth Science – GIS Interoperability Shared Data Model

10. Data Access through Adapters through DataFed SOAP,HTTP Get OGC WCS HTTP Get, Post OGC WMS HTTP Get Station-Point SQL Server, Files… Sequence Image, file nDim Grid OpenDAP NetCDF, … Other Traject., Event, Pic Sources Diverse formats Many data models Data Wrapper Data into geo-cubes Queries to views Virtual Data Cube Global geo-cube data model Makes queries data-neutral Others? e.g. OpenDAP Output Protocol dependent User specified GeoTable CSV,XLS,GML GeoGrid GML,NetCDF.. GeoImage GeoTIFF, PNG.. Other MS Dataset.. Query Adapter Maps query to protocol User selects protocols

13. OGC WCS Demonstration: AirNOW Station Dataset Map View Services WCS Query http://webapps.datafed.net/dvoy_services/ogc.wsfl?SERVICE=wcs&REQUEST=GetCoverage&VERSION=1.0.0&CRS=EPSG:4326&COVERAGE=AIRNOW.pmfine&FORMAT=CSV&BBOX=-125.3889,22.55111,-61.40667,51.20889,0,0&TIME=2005-06-26T15:00:00Z&WIDTH=999&HEIGHT=999&DEPTH=999 Formats: CSV, NetCDF-table, etc Time View Services http://webapps.datafed.net/dvoy_services/ogc.wsfl?SERVICE=wcs&REQUEST=GetCoverage&VERSION=1.0.0&CRS=EPSG:4326&COVERAGE=AIRNOW.pmfine&FORMAT=CSV&BBOX=-90.16028,38.61222,-90.16028,38.61222,0,0&TIME=2005-06-20T00:00:00Z/2005-06-30T00:00:00Z&WIDTH=999&HEIGHT=999&DEPTH=999 Formats: CSV, NetCDF-table, etc

15. Benefits of WMS Compatibility: Geospatial One-Stop Provides Access to DataFed spatial layers through WMS Problem: No Time Dim! http:// www.datafed.net/DataLinks/OGC/OGC.htm DataFed/VIEWS Asian Dust Concentration (circles) S. Falke