1. Metadata in the IERS Data and Information System Daniela Thaller, Wolfgang R. Dick, Allison Craddock

2. Thaller et al. ׀ GGOS Geodetic Metadata Workshop ׀ August 10-11, 2015 ׀ Page 2  Data management system  Address management system  Content management system  Data analysis and visualization tools  Web, data, ftp, mail servers: www.iers.org, data.iers.org, ftp.iers.org  Maintained by the IERS Central Bureau IERS Data and Information System

3. Thaller et al. ׀ GGOS Geodetic Metadata Workshop ׀ August 10-11, 2015 ׀ Page 3  Retrieval of IERS products from different servers of IERS components  Checks for completeness, formats, etc.  Automated extraction of metadata  Creation of files in different formats (including XML)  Creation of plots of Earth orientation series  Storage of data and files  Display of data files, metadata, and plots at IERS web servers  Monitoring of processes and results Data management system

4. Thaller et al. ׀ GGOS Geodetic Metadata Workshop ׀ August 10-11, 2015 ׀ Page 4 Server in DMZ Webserver Data files Servers in LAN Files, databases, CMS, tools, … Comparison with existing data Import: Data Parsing: Metadata Creation (Java): XML, HTML, CSV, PDF Plots Writing/Updating: Original files, XML, … Plots Metadata Links IERS servers (web, data, ftp) Import to servers: Web pages Data files Links zu data files Metadata Publications Addresses External links Firewall Remote servers of IERS components Import / Update: Data files Data management system (simplified) Firewall

5. Thaller et al. ׀ GGOS Geodetic Metadata Workshop ׀ August 10-11, 2015 ׀ Page 5  Different types of data: Long-term data (ITRF, ICRF, …): −Metadata created „by hand“ Frequently updated data (EOP, …): −Constant metadata part: created „by hand“ and stored for each product −Changing metadata part: automatically extracted from each product version by parser scripts −Final metadata: constant and changing parts merged  Final metadata:  Stored internally (XML/database) for export and web services  Displayed in web pages  Simple search function (full-text search) in web site Metadata for IERS data

6. Thaller et al. ׀ GGOS Geodetic Metadata Workshop ׀ August 10-11, 2015 ׀ Page 6 Example 1: ITRF

7. Thaller et al. ׀ GGOS Geodetic Metadata Workshop ׀ August 10-11, 2015 ׀ Page 7 Example 1: ITRF (cont‘d)

8. Thaller et al. ׀ GGOS Geodetic Metadata Workshop ׀ August 10-11, 2015 ׀ Page 8 Example 2: EOP (Bulletin A)

9. Thaller et al. ׀ GGOS Geodetic Metadata Workshop ׀ August 10-11, 2015 ׀ Page 9 Example 2: EOP (Bulletin A) – cont‘d

10. Thaller et al. ׀ GGOS Geodetic Metadata Workshop ׀ August 10-11, 2015 ׀ Page 10 Example 2: EOP (Bulletin A) – cont‘d

11. Thaller et al. ׀ GGOS Geodetic Metadata Workshop ׀ August 10-11, 2015 ׀ Page 11 Example 2: EOP (Bulletin A) – cont‘d

12. Thaller et al. ׀ GGOS Geodetic Metadata Workshop ׀ August 10-11, 2015 ׀ Page 12 Example 2: EOP (Bulletin A) – cont‘d

13. Thaller et al. ׀ GGOS Geodetic Metadata Workshop ׀ August 10-11, 2015 ׀ Page 13 Example 2: EOP (Bulletin A) – cont‘d

14. Thaller et al. ׀ GGOS Geodetic Metadata Workshop ׀ August 10-11, 2015 ׀ Page 14  IERS metadata are mainly conform to ISO 19115 „Geographic Information – Metadata“  Problem: ISO 19115 metadata model is not completely suited for IERS data (especially EOP)  Solution: IERS-specific metadata elements are stored as separate elements internally and displayed in web pages, but combined as comments element when exporting ISO 19115- conform metadata. ISO 19115-conform metadata

15. Thaller et al. ׀ GGOS Geodetic Metadata Workshop ׀ August 10-11, 2015 ׀ Page 15  IERS metadata profile extended to the SINEX format  Metadata created also for some global geophysical fluids data  Development of tools for the management of metadata (e.g. metadata editor and parser), tests with existing editors  Interaction with Meta Information Systems (MIS): Successful test in 2006 ff: GeoPortal.Bund (MIS to search for geo data in Germany), Catalogue Service Web interface of this MIS was adapted to the IERS metadata database Currently IERS metadata are not used in Meta Information Systems  IERS is ready to provide metadata to a GGOS MIS Other developments and tests

16. Thaller et al. ׀ GGOS Geodetic Metadata Workshop ׀ August 10-11, 2015 ׀ Page 16 Contact: Federal Agency for Cartography and Geodesy Section Geodesy 1 / IERS Central Bureau Richard-Strauss-Allee 11 60598 Frankfurt, Germany contact person Daniela Thaller daniela.thaller@bkg.bund.de www.bkg.bund.de, www.iers.org Tel. +49 (0) 69 6333-273 Thank you for your kind attention!