Diversity++2015 talk: R2R+BCO-DMO - Linked Oceanographic Datasets
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R2R and BCO-DMO are linked oceanographic data repositories that provide metadata for datasets collected from ocean research vessels and expeditions. They utilize linked data to improve discovery of datasets across repositories and attribute datasets to contributors. R2R catalogs vessel instrumentation and contains over 500k triples, while BCO-DMO catalogs PI-submitted datasets including over land deployments and contains over 2 million triples. The repositories overlap in contributors and some cruises, and link metadata to external sources like DBPedia.
Diversity++2015 talk: R2R+BCO-DMO - Linked Oceanographic Datasets
- 1. R2R+BCO-DMO – Linked Oceanographic Datasets Adila Krisnadhi1,5 Robert Arko2 Suzanne Carbotte2 Cynthia Chandler3 Michelle Cheatham1 Pascal Hitzler1 Yingji Hu4 Krzysztof Janowciz4 Peng Ji2 Nazifa Karima1 Adam Shepherd3 Peter Wiebe3 1Data Semantics Lab, Wright State University 2Lamont-Doherty Observatory, Columbia University 3Woods Hole Oceanographic Institution 4Geography Department, University of California, Santa Barbara 5Faculty of Computer Science, Universitas Indonesia Diversity++ 2015 Krisnadhi, et al Diversity++ 2015 1 / 13
- 2. Why Linked Data for Oceanography Data proliferation Increased number of repositories ⇒ increased heterogeneity. Need to discover, access, and integrate data cross repositories R2R & BCO-DMO are repositories. Both hold datasets of field observations. Linked data is for metadata of those datasets. Linked data objective: starting point to enable dataset discovery. Additional benefit: attribution of datasets to contributors in the form of links. Krisnadhi, et al Diversity++ 2015 2 / 13
- 3. Rolling Deck Repository (R2R) Screen shot (10/10/2015) from: http://www.rvdata.us/catalog/Kilo_Moana Krisnadhi, et al Diversity++ 2015 3 / 13
- 4. R2R http://www.rvdata.us Every NSF-funded cruise on a vessel in the academic fleet creates an R2R record. Environmental sensor data on-board vessels. Catalog of vessels, instrumentation systems, expeditions, datasets, investigators, organizations, funding awards, cruise reports, and navigation tracks. >530k triples, 25 in-service vessels, >4.3k cruises, >18 mil. archived files 60,000 page views per month. Krisnadhi, et al Diversity++ 2015 4 / 13
- 5. R2R: Architecture Original picture from: http://www.rvdata.us/system/files/overview.png as displayed on (10/10/2015) at http://www.rvdata.us/overview Krisnadhi, et al Diversity++ 2015 5 / 13
- 6. R2R - http://data.rvdata.us Krisnadhi, et al Diversity++ 2015 6 / 13
- 7. Biological and Chemical Oceanography Data Management Office (BCO-DMO) Screen shot (10/10/2015) from: http://mapservice.bco-dmo.org/mapserver/maps-ol/index.php Krisnadhi, et al Diversity++ 2015 7 / 13
- 8. BCO-DMO: Architecture BCO-DMO Data Management Architectural Overview Metadata Database and Web Content Data ServerData ServerData Server Geospatial Access MapServer-cartography OpenLayers-interface; interrogate and draw features ExtJS and other JavaScript libraries-environment MySQL-metadata BCO-DMO Website Public access via Drupal Web content and metadata JGOFS/GLOBEC Backend Data Storage and Retrieval Supporting Software - Drupal - PHP, Perl - Load navigation and date information into Location table (Perl) - Report modules - NSF Tracker subsystem Data Manager access Metadata and web content insert, update, delete and display Perl Library Perl code calling REST API via Drupal November 21, 2013 Highlights Text based interface; Geospatial (MapServer) interface; Metadata database stored in Drupal CMS; Distributed backend data management system; Fitness for purpose tools in MapServer and JGOFS/GLOBEC; Browser clients, also distributed; Ability to support other data management backends; Semantic elements (contributed vs standard names); Advanced search using triple stores from several sources; No login required; Access to metadata; Access to actual data; Data manager interface via Drupal; Direct transfer of data and metadata to appropriate national archive, such as NODC, when data are final. Original picture from: http://www.bco-dmo.org/sites/default/files/BCO-DMO_System_Architecture.pdf as displayed on 10/10/2015 Krisnadhi, et al Diversity++ 2015 8 / 13
- 9. BCO-DMO http://bco-dmo.org PI of NSF-funded research expedition must submit data from their expedition to BCO-DMO. PI may bring own instruments. Catalog of datasets, instrumentation systems, measurement parameters, investigators, organizations, funding awards, projects, programs, and deployments. Deployments involve than just vessels (i.e., not just cruises). >2.1 mil triples, 7,500 datasets including information about >1.7k researchers, >2.1k deployments, 500 projects. 6.5k page views per month. Krisnadhi, et al Diversity++ 2015 9 / 13
- 10. BCO-DMO Krisnadhi, et al Diversity++ 2015 10 / 13
- 11. Overlaps Only a few dozens oceanographic research vessels being deployed. R2R is vessel-centric. BCO-DMO is PI-centric and has more than just cruise. Overlapping set of people, cruise identifiers (linked between each other). 341 person instances (exact match) External links R2R organization to dbpedia: 288/520 BCO-DMO instruments to dbpedia: 42/409 BCO-DMO organization to dbpedia: 81/488 Krisnadhi, et al Diversity++ 2015 11 / 13
- 12. Acknowledgements GeoLink Project (NSF) ISWC 2015 Travel Award Krisnadhi, et al Diversity++ 2015 12 / 13
- 13. Thank you! Krisnadhi, et al Diversity++ 2015 13 / 13