Australian Antarctic Division Metadata Dave Connell The Australian

Australian Antarctic Division Metadata Dave Connell

The Australian Antarctic Data Centre https: //data. aad. gov. au/

The Australian Antarctic Data Centre § Established in 1995 § Has responsibility for the data management of the Australian Antarctic program § Fulfils Australia's obligations under Article (III). (1). (c) of the Antarctic Treaty – “Scientific observations and results from Antarctica shall be exchanged and made freely available. ” § A large number of multi-themed science projects running each season § Diverse management requirements § Core Trust Seal Accreditation (World Data System)

Metadata History § 1995 -1999 – ANZLIC § 1999 -present – DIF § § Developed and maintained by the Global Change Master Directory (part of NASA) Meets obligation to international Antarctic community § 2008 -present – ISO 19115 Profiles and EML § Vanilla, MCP 1. 4, ANZLIC, ANDS (RIF-CS) § 2019 – ISO 19115 -1

Metadata Process §The metadata process at the AADC Create/Edit (metadata creation/editing) § User creates/edits a metadata record § Record is submitted to the metadata officer for checking § Once metadata officer is satisfied, the record Check/Approve is loaded into the database and made live §Involves a human step – records are not automatically loaded Load

Creating/Editing Metadata § A good metadata authoring tool is key § GCMD DIF tool § § § Complex Jargon Clunky § Mostly produced poor quality metadata that required AADC time to fix

Creating/Editing Metadata § 2012 - Word template alternative § § § Short and simple Could be used offline (e. g. on Antarctic voyage) Enormously successful – high quality metadata produced § Lot of work for the AADC to then convert into a DIF metadata record § § Time consuming Manual process http: //www. bernhardtwealth. com/blog/complex-vs-simpleinvestment-strategies-ii

Creating/Editing Metadata § 2015 – Release of AADC developed metadata tool § § § DIF based Streamlined – many fields removed or automatically set Wizard interface Produces complete DIF XML, minimal modification by AADC Very successful

Metadata Availability § 2010 ish – 2018 – WEBDAV § Was hacked/vulnerable, and had to be taken offline. § 2018 – OAM-PMH service set up. § Seems to be functioning properly…

ISO 19115 -1 Process § Reasonable understanding of 19115 -1, but not 19115 -3 § Had a mapping – I knew what needed to go where, but didn’t know what it should look like § For the original ISO standard I used the Bluenet tool to create a dummy metadata record and created a DIF-ISO XSLT from that § This time I used Evert’s dummy metadata record as a basis § Enough information there for me to extrapolate a complete DIF based ISO 19115 -1 record

ISO 19115 -1 Process § Had to incorporate two elements from 19115/19157 (thanks to advice from Evert Bleys) § Vertical. CRS information – EX_Vertical. Extent allows for values to be added, but does not specify a unit or a direction (altitude or depth) § 19115 solution re-used § Data Quality information – spatial. Resolution was inadequate for describing horizontal and vertical resolutions. No way of describing temporal resolution information. § Positional Accuracy and Temporal Quality now held in 19157 (were in 19115). Re-used 19115 solution with new namespaces.

ISO 19115 -1 Process – XSLT Created § New DIF-ISO 19115 -1/-3 XSLT created § Doesn’t quite cover the full DIF standard (very close) § Significant input from Johnathan Kool to improve functionality § Tested on the Geoscience Australia Validator § Managed to resolve all issues – clean bill of health § Evert Bleys kindly agreed to do some more testing § § Uncovered some more issues – not so clean… Currently resolving the issues – about three remain

Next Steps § Implement the XSLT § § Convert records to 19115 -1 format Will continue to make records available in 19115 format also § Disseminate it out to the Antarctic community (who use DIF)