Transcript Overview of WMO Information System (WIS)

WMO
World Meteorological Organization (WMO)
Observing and Information Systems Department
WMO Information System (WIS)
The WMO
Information System
(WIS)
Presented by
Timo Pröscholdt <[email protected]>
WIS Professional Officer for WIS
WMO: Observations, Models,
Data and Information
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WIS Overview
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Global Telecommunication System (GTS)
Cloud I
Tokyo
Melbourne
Washington
Buenos Aires
Brasilia
Beijing
Sofia
Moscow
New Delhi
Prague
Exeter
Jeddah
Offenbach
Cloud II
Nairobi
Toulouse
Dakar
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Cairo
Algiers
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Types of Centres:
GISCs, DCPCs, and NCs
•World Radiation Centre
•Regional Instrument Centres
DCPC
•IRI and other climate
research institutes
•Universities
•Regional Climate Centres
NC
NC
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DCPC
NC
NC
WIS
core
network
GISC
Real-time "push"
On-demand "pull"
NC/
DCPC
GISC
NC
NC = National Centres
GISC = Global Information
System Centres
DCPC = Data Collection or
Production Centres
NC
Area Meteorological Data
Communication Networks
(AMDCNs)
NC/
DCPC
KEY:
•GAW World Data Centres
•GCOS Data Centres
•Global Run-off Data Centre
•Global Precipitation
Climatology Centre
International Organizations
(IAEA, CTBTO, UNEP, FAO.. )
GISC
GISC
Satellite
Two-Way
System
NC
NC
WIS Overview
GISC
DCPC
Satellite
Dissemination
IGDDS,
EUMETSAT,
etc.
NC
Commercial
Service
Providers
NC
WMO World
Data
Centres
Internation
projects
(eg GMES
HALO)
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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
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Some GISCs / Japan
http://www.wis-jma.go.jp/cms/
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Some GISCs / DWD
http://gisc.dwd.de
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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
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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
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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
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metadata synchronization
between WIS and GEOSS
• The whole WIS
catalogue is
available at each
GISC
• Can be harvested
regularly with OAIPMH
• But what about
validation?
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GEOSS
clearinghouse
OAI
harveesting
GISC
Offenbach
GISC Tokyo
Other GISC
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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
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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 OAIPMH systems
- might loose updates due to « delta » syncing
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