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Page 1 © Crown copyright 2005 Workshop on Metadata Beijing27-29 September Report on Metadata Gil Ross (Met Office UK) WIS Working Group Geneva.

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Presentation on theme: "Page 1 © Crown copyright 2005 Workshop on Metadata Beijing27-29 September Report on Metadata Gil Ross (Met Office UK) WIS Working Group Geneva."— Presentation transcript:

1 Page 1 © Crown copyright 2005 Workshop on Metadata Beijing27-29 September Report on Metadata Gil Ross (Met Office UK) WIS Working Group Geneva

2 Page 2 © Crown copyright 2005 Workshop on Metadata Beijing27-29 September Contents IPET-MI & Metadata Workshop Beijing Report of ISO Expert vision Issues Work Plan vGISC Baudouin Raoults model GO-ESSP INSPIRE

3 Page 3 © Crown copyright 2005 Workshop on Metadata Beijing27-29 September IPET-MI + Metadata Workshop WIS Working Group Geneva

4 Page 4 © Crown copyright 2005 Workshop on Metadata Beijing27-29 September Working Group Recommendations Recommendations made by sub-groups during the Workshop on Metadata on the following activities A.Definition of time in WMO Core profile – extensions to ISO standard, and requests for enhancement to ISO standard if essential (including calendar type) B.Spatial definition in WMO Core profile – area and single point specifications C.Handling languages in Core profile – unique identifiers (how unique? how define?) D.Features models - Divide between common and feature for location of metadata E.Features models - how to identify features needed F.Catalogues needed in support of Core Profile (excluding feature models) G.GML representation of catalogues H.Creating taxonomies I.Tools for catalogue maintenance and metadata creation J.Operation of a real time distributed catalogue service – including version control K.Processes for managing Profile, catalogues etc

5 Page 5 © Crown copyright 2005 Workshop on Metadata Beijing27-29 September IPET-MI Work contents for the revision of the draft version of the WMO Core Profile Development of a Core Feature Catalogue compliant with ISO Operational information catalogues Governance of standards Standards to be considered with the highest priority for the WIS Issues to take up with ISO TC211 Work packages – extensive!

6 Page 6 © Crown copyright 2005 Workshop on Metadata Beijing27-29 September WMO Interoperability WMO is HIGHLY interoperable GOS/GDPS/GTS for over 50 years but in a closed user group which is admittedly large (187 member states) but which mainly talks to itself WMO has its own processes and protocols and formats and data types and networks and software

7 Page 7 © Crown copyright 2005 Workshop on Metadata Beijing27-29 September WMO Interoperability But this isnt the big-wide-world It isnt even all WMO Commissions We need even better interoperability in WWW with the rest of WMO with USERS of our data with cheap software on everybodys laptop Isnt this the remit of the National Centres? Id say – NO.

8 Page 8 © Crown copyright 2005 Workshop on Metadata Beijing27-29 September WMO Interoperability World Weather Watch Climatology Oceanography Agriculture etc.etc. The Big Wide World NMS

9 Page 9 © Crown copyright 2005 Workshop on Metadata Beijing27-29 September Interoperability Consider the following graphic. It happens to be created by MetO but It has a map background, Some contours, that has access to, Data, Sensible weather objects created by a forecaster, but could be another Met Service, A legend including a logo.

10 Page 10 © Crown copyright 2005 Workshop on Metadata Beijing27-29 September Components of a chart

11 Page 11 © Crown copyright 2005 Workshop on Metadata Beijing27-29 September Standards and Interfaces TBWW has standards and interfaces which are becoming ubiquitous and cheap Specialised formats are being ignored, circumvented and made obsolete specialised formats and protocols do have their place in closed systems – e.g. GTS however they should be presented externally in more widely recognised standards So WMO should have unified standards to present data and services to TBWW

12 Page 12 © Crown copyright 2005 Workshop on Metadata Beijing27-29 September Standards and Interfaces What are these standards? Most likely Web Services data GRID OGC and ISO Catalogue services WMS – web mapping service WFS – web feature service WCS – web coverage service XML – GML Catalogues and repositories

13 Page 13 © Crown copyright 2005 Workshop on Metadata Beijing27-29 September Catalogues and repositories metadata catalogue feature catalogue schema repositories vocabularies Question - What is the difference? Answer - it isnt entirely clear and - there isnt a unique answer Identifiers (not file naming system) gazeteers locations CRS coordinate reference systems service catalogues WMO already does this but not interoperably

14 Page 14 © Crown copyright 2005 Workshop on Metadata Beijing27-29 September What do we do now? Develop content for the catalogues Metadata Features and coverages Observations and Measurement CSML GML Gazeteers Vol 9 is good ICAO codes – not good CRS definitions

15 Page 15 © Crown copyright 2005 Workshop on Metadata Beijing27-29 September What do we do now (2) Vocabularies communityTopicCategory and keywords - a WMO taxonomy Parameter lists, definitions GRIB and BUFR tables WWW usage CF convention for netCDF Climatology and Oceanography usage Develop services – at NMS level - a number of different contexts

16 Page 16 © Crown copyright 2005 Workshop on Metadata Beijing27-29 September ISSUES WIS Working Group Geneva

17 Page 17 © Crown copyright 2005 Workshop on Metadata Beijing27-29 September Issues WWW and Archive data Identifying GTS data Alpha codes and text GRIB BUFR TIFs Travelling Metadata Catalogues Metadata Feature gazetteers

18 Page 18 © Crown copyright 2005 Workshop on Metadata Beijing27-29 September vGISC metadata WIS Working Group Geneva

19 Page 19 © Crown copyright 2005 Workshop on Metadata Beijing27-29 September Baudouins metadata fragment model Overview the WMO Core Profile-compliant metadata documents are split into a hierarchy of fragments the fragments are indexed … keeping the indexes small as fragments that are inherited by more than one full document only appear once the relationships between the fragments (expressed with the tag) are stored in the MySQL database as bi-directional links searching occurs on the fragments (or rather the indexes on the fragments) the fragments are eventually merged to form a valid WMO Core Profile-compliant document

20 Page 20 © Crown copyright 2005 Workshop on Metadata Beijing27-29 September GO-ESSP WIS Working Group Geneva

21 Page 21 © Crown copyright 2005 Workshop on Metadata Beijing27-29 September GO-ESSP Climate Forecasting Convention NetCDF OPenDAP IPCC IOC JCOMM Existing vocabularies GCMD ENPARDIS Difficulty of merging vocabularies Working Systems

22 Page 22 © Crown copyright 2005 Workshop on Metadata Beijing27-29 September INSPIRE WIS Working Group Geneva

23 Page 23 © Crown copyright 2005 Workshop on Metadata Beijing27-29 September INSPIRE European LEGISLATION For Interoperability Geographic based Encompasses environment Drafting Teams Metadata Data Specifications Network Services Data Sharing Legislation Monitoring


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