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

© Crown copyright 2005 Workshop on Metadata Beijing27-29 September Page 1

Report on MetadataGil Ross (Met Office UK)

WIS Working Group Geneva


Contents

IPET-MI & Metadata Workshop BeijingReport of ISO Expert “vision” IssuesWork Plan

vGISCBaudouin Raoult’s model

GO-ESSPINSPIRE


IPET-MI + Metadata Workshop



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


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 19110

Operational information cataloguesGovernance of standardsStandards to be considered with the highest priority for the WIS

Issues to take up with ISO TC211Work packages – extensive!


WMO Interoperability

WMO is HIGHLY interoperable GOS/GDPS/GTS

for over 50 yearsbut in a closed user groupwhich is admittedly large (187 member states)but which mainly talks to itself

WMO has its own processes and protocolsand formats and data typesand networksand software



But this isn’t the big-wide-worldIt isn’t even all WMO Commissions

We need even better interoperability in WWWwith the rest of WMOwith USERS of our datawith cheap software

on everybody’s laptopIsn’t this the remit of the National Centres?

I’d say – NO.



World Weather Watch

Climatology Oceanography

Agriculture etc.etc.

The Big Wide World

NMS


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.


Components of a chart


Standards and Interfaces

TBWW has standards and interfaces which are becoming ubiquitous and cheap

Specialised formats are being ignored, circumvented and made obsoletespecialised formats and protocols do have their

place in closed systems – e.g. GTShowever they should be presented externally in

more widely recognised standards So WMO should have unified standards to present data and services to TBWW


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


Catalogues and repositories

metadata catalogue feature catalogueschema repositoriesvocabulariesQuestion - What is the difference?

Answer - it isn’t entirely clear and - there isn’t a unique answer

Identifiers (not file naming system)gazeteers

locations CRS coordinate reference systems

service catalogues

WMO already does thisbut not interoperably


What do we do now?

Develop content for the cataloguesMetadataFeatures and coverages

Observations and MeasurementCSMLGML

Gazeteers Vol 9 is good ICAO codes – not goodCRS definitions


What do we do now (2)

VocabulariescommunityTopicCategory and keywords

- a WMO taxonomyParameter lists, definitions

GRIB and BUFR tablesWWW usage

CF convention for netCDFClimatology and Oceanography usage

Develop services – at NMS level

- a number of different contexts


ISSUES



Issues

WWW and Archive dataIdentifying GTS data

Alpha codes and textGRIBBUFRTIFs

Travelling MetadataCatalogues

MetadataFeaturegazetteers


vGISC metadata



Baudouin’s 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 <v:inherit> 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


GO-ESSP



GO-ESSP

Climate Forecasting ConventionNetCDFOPenDAP IPCC IOC JCOMM

Existing vocabularies GCMD ENPARDISDifficulty of merging vocabularies

Working Systems


INSPIRE



INSPIRE

European LEGISLATIONFor InteroperabilityGeographic basedEncompasses “environment”

Drafting TeamsMetadataData SpecificationsNetwork ServicesData SharingLegislation Monitoring

Documents

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