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An Overview

Making Data Available via the Biological and Chemical Oceanography Data Management Office. An Overview. R.C. Groman, M.D. Allison, C.L. Chandler D.M. Glover and P.H. Wiebe Woods Hole Oceanographic Institution Woods Hole, MA, USA. One year ago: Introduction

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An Overview

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  1. Making Data Available via the Biological and Chemical Oceanography Data Management Office An Overview R.C. Groman, M.D. Allison, C.L. Chandler D.M. Glover and P.H. Wiebe Woods Hole Oceanographic Institution Woods Hole, MA, USA AGU Fall Meeting 15-19 December 2008, San Francisco, CA

  2. One year ago: Introduction Today: Overview and Summary of Capabilities • Data access • Data discovery • Download options • Display • Interoperability features AGU Fall Meeting 15-19 December 2008, San Francisco, CA

  3. + The Goal: Improved accessibility to Ocean Science Data = AGU Fall Meeting 15-19 December 2008, San Francisco, CA

  4. Data interfaces www.bco-dmo.org AGU Fall Meeting 15-19 December 2008, San Francisco, CA

  5. JGOFS/GLOBEC Data Management System Traditional tabular view • Public domain, free software used to serve US JGOFS, US GLOBEC, and other data over the Internet. • A simple and relatively straightforward way to make ASCII data available on the web. • Distributed data servers (about 12 computers) located at several sites. AGU Fall Meeting 15-19 December 2008, San Francisco, CA

  6. AGU Fall Meeting 15-19 December 2008, San Francisco, CA

  7. Provides access to geo-referenced data and metadata. View data from different sources Uses OGC interface standards: WMS and WFS Visualize data with graphics generated “on the fly” Geospatial Interface Using MapServer AGU Fall Meeting 15-19 December 2008, San Francisco, CA

  8. AGU Fall Meeting 15-19 December 2008, San Francisco, CA

  9. AGU Fall Meeting 15-19 December 2008, San Francisco, CA

  10. AGU Fall Meeting 15-19 December 2008, San Francisco, CA

  11. AGU Fall Meeting 15-19 December 2008, San Francisco, CA

  12. Key to Interoperability is through the metadata. AGU Fall Meeting 15-19 December 2008, San Francisco, CA

  13. BUT… • Needed to replace the text-based metadata records with a more structured approach • Several false starts, e.g. XML • Standards, yes, of course, but which one(s)? GCMD(DIF)? FGDC? AGU Fall Meeting 15-19 December 2008, San Francisco, CA

  14. AGU Fall Meeting 15-19 December 2008, San Francisco, CA

  15. Design concepts:Keep the design simple Step-wise (iterative) improvement Take full advantage of the ease of database modifications provided by modern relational database systems. A Metadata Database!! MySQL AGU Fall Meeting 15-19 December 2008, San Francisco, CA

  16. Metadata Database Schema AGU Fall Meeting 15-19 December 2008, San Francisco, CA

  17. This is a lot of data!! 31 projects from 9 programs. 2380+ datasets (so far) AGU Fall Meeting 15-19 December 2008, San Francisco, CA

  18. We currently have a rudimentary search on each page. etc. (We are working on an advanced search.) AGU Fall Meeting 15-19 December 2008, San Francisco, CA

  19. Metadata = Interoperability • It is the availability, accessibility, and completeness of metadata that enable people to share their data with others. • Standards are evolving and we are prepared to exchange data in whatever exchange formats are developed. We are already working with the Marine Metadata Interoperability project on semantic interoperability. Syntactic interoperability is next. • The goal is to be able to display, synthesize, and share data when the data were collected by many different means, using many different instruments, and may even be called by different names. We aren’t there quite yet but we have made a good start. • Metadata records have been designed to support re-use of the data and are stored in a relational database (MySQL). AGU Fall Meeting 15-19 December 2008, San Francisco, CA

  20. Summary The Biological and Chemical Oceanography Data Management Office makes data available through its website, www.bco-dmo.org. The data are accessible in a text-based tabular view using the JGOFS/GLOBEC Data Management System or a geospatial view using the OGC-compliant MapServer Interface. The data are downloadable via the text interface in ASCII, Matlab or NetCDF and via the MapServer interface using WFS and WMS. There are many display options available for quick looks at the data from both interfaces. A rudimentary search capability exists and a more advanced capability is almost ready. With the capabilities inherent in the Metadata database, BCO-DMO is ready to tackle the next obstacle to achieving true data interoperability. AGU Fall Meeting 15-19 December 2008, San Francisco, CA

  21. Acknowledgments • Co-authors and partners in crime: Bob Groman, Cyndy Chandler, Peter Wiebe and David Glover • Charlton Galvarino, Xiaoyan Ye and Julie Allen for making it possible for the MapServer, the Search capability and the website to access and use the Metadata Database • Particular thanks to the gang at MMI led by John Graybeal because without that workshop a couple of weeks ago, I would still be totally clueless about semantic interoperability. • NSF for their support. AGU Fall Meeting 15-19 December 2008, San Francisco, CA

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