1 / 29

Implementation of Model Data Interoperability for IOOS: Successes and Lessons Learned

Implementation of Model Data Interoperability for IOOS: Successes and Lessons Learned. Rich Signell USGS Woods Hole, MA / NOAA Silver Spring USA. Model Data Interoperability is Low-Hanging Fruit!. US Integrated Ocean Observing System (IOOS ® ). IOOS ® Plan defines: Global Component

july
Download Presentation

Implementation of Model Data Interoperability for IOOS: Successes and Lessons Learned

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Implementation of Model Data Interoperability for IOOS: Successes and Lessons Learned Rich Signell USGS Woods Hole, MA / NOAA Silver Spring USA Model Data Interoperability is Low-Hanging Fruit!

  2. US Integrated Ocean Observing System (IOOS®) • IOOS® Plan defines: • Global Component • Coastal Component • 17 Federal Agencies • 11 Regional Associations

  3. DMAC approved services for Gridded Data and Model Outputs satellite HF radar gridded model outputs Table of Contents Data Provider OPeNDAP/CF OGC WCS (Web Coverage Service) Data Values Quality Control Metadata CF Metadata

  4. The Problem: Stovepiped Model Access ChesROMS Model Wen Long, UMaryland UCLA/JPL ROMS SCB Model Yi Chao, JPL

  5. Result: Inability to compare and assess model results & underutilization of model products The GoMOOS Nowcast/Forecast Circulation Model (University of Maine)

  6. Issue: Ocean grids are not regularly spaced! Curvilinear orthogonal horizontal coordinates Stretched surface and terrain following vertical coordinates

  7. Climate and Forecast (CF) Metadata Conventions Groups adopting CF: GO-ESSP: Global Organization for Earth System Science Portal IOOS-DMAC: Integrated Ocean Observing System ESMF: Earth System Modeling Framework OGC: Open Geospatial Consortium (via WCS netcdf encoding)

  8. CF-Compliant Ocean Model File

  9. NetCDF Java Library

  10. NcML XML markup language for NetCDF

  11. Data Interoperability Model

  12. NJ Toolkit for Matlabhttp://njtbx.sourceforge.net • Objective: Make it simple to access CF data • Example function: • [t, geo]=nj_tslice(URI,’temp’,1); • t = 22x120x180 single • geo = • lat: [120x180 single] • lon: [120x180 single] • z: [22x120x180 double] • time: 733582 (matlabdatenum) • nj_tslice works identically for ROMS, POM, ECOM, WRF, Wavewatch3 • URI can be: local NetCDF, remote NetCDF, NcML, OpenDAP Data URL • Coding by Sachin Kumar Bhate MSSTATE

  13. Comparing Models with Data in Matlab Model 1: UMASS-ECOM Model 2: UMAINE-POM Data: SST 2008-Sep-08 07:32

  14. Buoy_comp.m: Model/Data comparison of Wave Height

  15. Browser-based Mapping with ncWMS/Godiva2

  16. 3D Visualization with the Integrated Data Viewer (IDV)

  17. Single Point of Access Catalog:GEO-IDE => IOOS Regions http://ferret.pmel.noaa.gov/thredds/geoideCatalog.html

  18. Working with Data in ArcGIS using the NOAA/ASA Environmental Data Connector

  19. 14 Different Ocean Forecast Models Spanning CONUS Waters in IDV

  20. OOI-CI OSSE (Sep-Oct, 2009)

  21. Models being used for BP Spill

  22. Successes • Existing Unidata technology allowed for standards-based delivery of aggregated geospatial data from native model grids that put little or no effort on the data provider • Demonstrated interoperability with 17 THREDDS servers in 11 IOOS Regions • What did we get? • Single point of access for regional model results • Interoperable software • More eyes on the model results • More usage of model results • Faster feedback to modelers • Improved models • Increased community support for standards-based access

  23. What Next? • Continue work on a high-level scientific toolbox for standardized access to model data. (Matlab toolbox based on NetCDF-Java) • Develop unstructured grid support: Common Data Model implemented in NetCDF-Java with methods comparable to structured grid • Applications need to be modified to read standardized data via OPeNDAP instead of home-grown files • Work on discovery and documentation

  24. Lessons Learned • Honor the existing practices • Users are best served by developing infrastructure for Developers • Focus on success: find something that works, clone it, and build off it

  25. Questions, Feedback? Dr. Richard P. Signell+1 (508) 457-2229rsignell@usgs.gov

  26. Role of Regions • Develop customized THREDDS catalogs for regional users • Report status of services (e.g. NetCheck) • Assess and help with gridded data standards compliance following UAF-developed techniques • Develop end-user applications that access gridded data, using CF-compliant OPeNDAP • Help educate regional scientists, developers, consultants that standardized services, libraries and tools are available

  27. Late Breaking News

  28. THREDDS • When people say “THREDDS”, they can mean a catalog or a data server • THREDDS Catalogs are XML files that define metadata, datasets and services • THREDDS Data Server is a Java data server application developed by Unidata, a simple and flexible way for delivering CF-compliant data via OPeNDAP

  29. OPeNDAP • When people say “OPeNDAP”, they can mean protocol, a server, or an organization • OPeNDAP (or just DAP) protocol: a remote data access service protocol with multiple responses • DDS – describes the format of the data • DAS – describes associated attributes • DDX – XML response containing the DDS & DAS • DODS – the actual data • OPeNDAP server: a server capable of serving the DAP protocol (e.g. THREDDS Data Server, Hyrax, Pydap, GrADS Data Server) • OPeNDAP organization: Defines and maintains the DAP protocol, develops servers and clients, provide custom OPeNDAP solutions

More Related