World Meteorological Organization (WMO) Observing and Information Systems Department WMO Information...
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World Meteorological Organization (WMO) Observing and Information Systems Department WMO Information System (WIS) WMO Presented by Timo Pröscholdt <[email protected]> WIS Professional Officer for WIS The WMO Information System (WIS)
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Transcript of World Meteorological Organization (WMO) Observing and Information Systems Department WMO Information...
World Meteorological Organization (WMO)Observing and Information Systems DepartmentWMO Information System (WIS)
WMO
Presented by Timo Pröscholdt <[email protected]>
WIS Professional Officer for WIS
The WMO Information System
(WIS)
October 2011 WIS Overview 2
WMO: Observations, Models, Data and Information
October 2011 WIS Overview 3
Global Telecommunication System (GTS)
Exeter
SofiaMelbourne
Buenos Aires
TokyoBeijing
Nairobi
Washington
Cloud Cloud I
Jeddah
Prague
Toulouse
Dakar Algiers
Offenbach
Brasilia
Cairo
New DelhiMoscow
Cloud II
October 2011 WIS Overview 4
Types of Centres: GISCs, DCPCs, and NCs
•IRI and other climate research institutes
•Universities•Regional Climate Centres
•GAW World Data Centres•GCOS Data Centres•Global Run-off Data Centre•Global Precipitation Climatology Centre
Satellite Dissemination
IGDDS, EUMETSAT,
etc.
•World Radiation Centre•Regional Instrument Centres
International Organizations (IAEA, CTBTO, UNEP, FAO.. )
Commercial Service
Providers
WMO World Data
CentresInternation projects
(eg GMES HALO)
Internet
Area Meteorological DataCommunication Networks
(AMDCNs)
SatelliteTwo-Way System
WIScore
network
GISC
NC DCPC
Internet
InternetInte
rnet
NCGISC
GISCGISC
GISC
NC
NC
NC
NC
NCNC
NC
NC
DCPC
DCPC
NC/DCPC
NC/DCPC
KEY:
NC = National Centres GISC = Global Information
System Centres DCPC = Data Collection or
Production Centres
Real-time "push"On-demand "pull"
WMO World Data
CentresInternation projects
(eg GMES HALO)
October 2011 WIS Overview 5
Status of WIS
• 3 GISCs and 4 DCPCs have been audited– DWD (GISC)– JMA (GISC)– CMA (GISC)– Eumetsat (DCPC)– ECMWF (DCPC)– Arctic Datacenter (DCPC)
• INMET Météo France, UK, NOAA will come online this year
October 2011 WIS Overview 6
Some GISCs / Japanhttp://www.wis-jma.go.jp/cms/
October 2011 WIS Overview 7
Some GISCs / DWDhttp://gisc.dwd.de
October 2011 WIS Overview 8
WIS metadata
• WIS metadata is ISO19139 based
• Data owners create and maintain metadata
• WMO core profile of ISO 19139 mandatory for WMO community internal metadata
• Have concluded that ISO19139 requires ISO19136, thus enfore gml 3.2.1 compat.
• Use the schema at http://wis.wmo.int/2011/schemata/iso19139_2007/schema.xsd
October 2011 WIS Overview 9
WIS and WIGOS
• WIGOS is at an early development stage
• WIGOS will use the WIS infrastructure for data exchange and metadata
=> Compatibility with WIS crucial for future WIGOS activities
October 2011 WIS Overview 10
WIS internal metadata synchronization
• NCs/DCPCs upload metadata to affiliated GISC
• GISCs make metadata of their affiliated centres available in OAI-PMH set
• All GISCs harvest from all other GISCs its part of the catalogue
October 2011 WIS Overview 11
metadata synchronization between WIS and GEOSS
• The whole WIS catalogue is available at each GISC
• Can be harvested regularly with OAI-PMH
• But what about validation?
GISC Offenbach
GEOSS clearinghouse
GISC Tokyo
Other GISC
OAI harveesting
October 2011 WIS Overview 12
Problems & Issues
Huge catalogue (initially 100k records, but can grow to >1m)
leads to potentially prohibitively big search results Large search results need to be visualized appropiately Browsing can help, but needs automatic partitioning
Is some sort of clustering the answer?
Different communities have different search behaviour Experts search for « precipitation », laymen for « rain » Ontologies might help, but
Impossible to agree one ontology
=> intelligent search algorithms needed
October 2011 WIS Overview 13
Questions
About ISO19139
- which ISO19139 do you use?
- how do you deal with situations where different schemata are used?
About OAI-PMH
- do you have experiences with large scale OAI-PMH systems
- might loose updates due to « delta » syncing
