1. IES - Institute for Environment and Sustainability SDIU – Spatial Data Infrastructures Unit Ispra - Italy http://ies.jrc.ec.europa.eu/ http://www.jrc.ec.europa.eu/ INSPIRE -ing GEMET – Enhancing Metadata Creation and Discovery Nicole Ostländer & Michael Lutz Lüneburg,10-12 September 2008 – EnviroInfo 1

2. 2 Overview 1) Overview 2) Background 3) INSPIRE -ing GEMET 4) Scenarios for metadata creation 5) Scenarios for discovery

3. Lüneburg,10-12 September 2008 – EnviroInfo 3 2) Background Motivation For spatial datasets and spatial dataset series the INSPIRE Implementing rule for Metadata requires that “at least one keyword shall be provided from the General Environmental Multi-lingual Thesaurus (GEMET) describing the relevant spatial data theme as defined in Annex I, II or III to Directive 2007/2/EC."

4. Lüneburg,10-12 September 2008 – EnviroInfo 4 2) Background GEMET GEneral Multilingual Environmental Thesaurus Developed for European Topic Centre on Catalogue of Data Sources (ETC/CDS) and European Environment Agency (EEA) Published and managed by EIONET More than 5000 concepts

5. Lüneburg,10-12 September 2008 – EnviroInfo 5 Ocean Current LakeHydrologic Cycle Hydrosphere Sea Deep Sea Ocean Open SeaHydrologic BalanceOcean Circulation Ocean Temperature Runoff Sediment Transport 2) Background

6. Lüneburg,10-12 September 2008 – EnviroInfo 6 2) Background INSPIRE Spatial Data Themes INSPIRE spatial data themes and descriptions are defined in Annex I, II and III of the Directive 2007/2/EC* Available in all 23 official EU languages *http://eur-lex.europa.eu/JOHtml.do? uri=OJ:L:2007:108:SOM:EN:HTML)

7. Lüneburg,10-12 September 2008 – EnviroInfo 7 INSPIRE -ing GEMET step 1

8. Lüneburg,10-12 September 2008 – EnviroInfo 8 3) INSPIRE -ing GEMET – step 1 INSPIRE Spatial Data Themes GEMET languages* Integrating INSPIRE Spatial Data Themes into GEMET * There is a mismatch between the languages available in the current version of GEMET and the 23 official EU languages.

9. Lüneburg,10-12 September 2008 – EnviroInfo 9 3) INSPIRE -ing GEMET – step 1

10. Lüneburg,10-12 September 2008 – EnviroInfo 10 3) INSPIRE -ing GEMET– step 1

11. Lüneburg,10-12 September 2008 – EnviroInfo 11 But …. What is the relation between GEMET concepts and INSPIRE Spatial Data Themes? INSPIRE -ing GEMET step 2

12. Lüneburg,10-12 September 2008 – EnviroInfo 12 3) INSPIRE -ing GEMET – step 2 Linking GEMET concepts and INSPIRE Themes Link was established manually: List of concepts that are linked to an INSPIRE Spatial Data Theme

13. Lüneburg,10-12 September 2008 – EnviroInfo 13 4) Metadata Creation Metadata creation Choice of additional keywords based on a given INSPIRE theme –Using GEMET structure –Using metadata statistics –Mixed approach

14. Lüneburg,10-12 September 2008 – EnviroInfo 14 4) Metadata Creation Using GEMET structure Metadata creator sees tree representation of GEMET taxonomy of concepts linked to the INSPIRE theme. Allows search among all sub-concepts to chose additional keywords Tree representation using GEMET structure considers GEMET taxonomy

15. Lüneburg,10-12 September 2008 – EnviroInfo 15 4) Metadata Creation Using metadata statistics cloud representation using metadata statistics Metadata creator sees cloud representation of GEMET concepts linked to INSPIRE themes. Size of each keyword depends on frequency of use independent of the GEMET classification will support a natural selection of terms and result in a set of frequently used keywords

16. Lüneburg,10-12 September 2008 – EnviroInfo 16 4) Metadata Creation Mixed approach Metadata creator sees tree (or graph) representation, size of each keyword depends on frequency of use. Mixed representation using GEMET structure and metadata statistics Combines the benefits of both approaches Might be more difficult to apply by inexperienced users

17. Lüneburg,10-12 September 2008 – EnviroInfo 17 5) Discovery Discovery help requestors in selecting search term(s): 3 apporaches –Using metadata statistics on keyword occurrence –Using metadata statistics on keyword co-occurrence –Using Gemet structure

18. Lüneburg,10-12 September 2008 – EnviroInfo 18 5) Discovery Using metadata statistics: occurrence of keywords The user sees GEMET concepts that have so far been used to annotate data (cloud representation). All other concepts are omitted Each presented keyword has at least one match. The user gets an impression of the amount of results before he performs the search

19. Lüneburg,10-12 September 2008 – EnviroInfo 19 5) Discovery Using metadata statistics: co-occurrence of keywords Can be used to suggest additional search terms to narrow down his search. After selecting one keyword, the users sees those keywords that are frequently used in combination. Using metadata statistics (co-occurrence of keywords)

20. Lüneburg,10-12 September 2008 – EnviroInfo 20 5) Discovery Using the GEMET structure Find additional matches by expanding the query with similar terms: 1. list of GEMET terms in a tree structure 2. automatic query expansion to include similar terms. Similarity measures … ?

21. Lüneburg,10-12 September 2008 – EnviroInfo 21 6) Summary 1.Integration of GEMET and INSPIRE Spatial Data Themes in two steps 2.

22. Lüneburg,10-12 September 2008 – EnviroInfo 22 Thank you very much for your attention {nicole.ostlaender|michael.lutz}@jrc.it