Collaboration for Beijing and Tokyo GISC prototypes Akira Nakamori JMA ET-WISC-III 11 -13. Jun. 2008 1
List of content 1. 2. 3. 4. 5. 6. 7. 8. Background Overview Providing datasets Metadata synchronization Remote data request Internet portal Web feed (ATOM) Plan 2
1. Background 1. 2. 3. 4. 5. 6. 7. 8. Background Overview Providing datasets Metadata synchronization Remote data request Internet portal Web feed (ATOM) Plan 3
Background of the collaboration (1) • The WIS implementation teams at CMA and JMA started to see an appropriate collaboration scheme in October 2005. • CMA and JMA agreed to establish a framework of collaboration alliance between two GISC prototypes in Beijing and Tokyo and announced it at ICG-WIS-3 in 2006 (at ICG-WIS-4 in 2007 afterwards). 4
Background of the collaboration (2) • The coordinated implementation started in March 2007. • Administrator of CMA and Director-General of JMA met in Beijing in July 2007 and agreed that the WIS development was included in cooperative activities between CMA and JMA. • First meeting of both WIS teams was held in Beijing, Nov 2007, to discuss technical details of the collaboration. 5
2. Overview 1. 2. 3. 4. 5. 6. 7. 8. Background Overview Providing datasets Metadata synchronization Remote data request Internet portal Web feed (ATOM) Plan 6
The overview of WIS activity Remote data request 7
Content of cooperation • CMA and JMA cooperate on the WIS development to implement interconnection and interoperation as follows. – Metadata exchange & synchronization – Remote data request & data access 8
3. Providing datasets 1. 2. 3. 4. 5. 6. 7. 8. Background Overview Providing datasets Metadata synchronization Remote data request Internet portal Web feed (ATOM) Plan 9
Data Specification CMA JMA 10
Metadata Specification • Make metadata of operational data routinely • Type of Metadata for synchronization – SYNOP, TEMP, . . . • Frequency of updating metadata – 4 times / day • WMO core metadata profile ver. 0. 2 11
CMA Metadata synchronization JMA 4. Metadata synchronization 1. 2. 3. 4. 5. 6. 7. 8. Background Overview Providing datasets Metadata synchronization Remote data request Internet portal Web feed (ATOM) 12 Plan
Metadata synchronization • CMA and JMA implemented the metadata exchange. – STEP 1 : FTP get (PULL) • CMA and JMA also plan to implement on metadata exchange in future. – STEP 2 : OAI-PMH* • OAI-PMH* : The Open Archives Initiative Protocol for Metadata Harvesting 13
Example (metadata synchronization) CMA JMA 14
JMA CMA Remote data request 5. Remote data request 1. 2. 3. 4. 5. 6. 7. 8. Background Overview Providing datasets Metadata synchronization Remote data request Internet portal Web feed (ATOM) 15 Plan
Remote data request • CMA and JMA agreed with protocol and interface • Users can get the data provided only at the CMA(JMA) site by sending request to the JMA site without visiting the CMA site. 16
Request for JMA data to CMA • Remote request performed when CMA’s server have no data for user’s request. User locate the data CMA JMA (1) Catalogue node Data Portal (3) CMA data sources No(*) (4) User can check request processing result at CMA portal (9) Request File (XML) (2) Service node (5) (7) Data Portal Service node JMA data sources Yes (6) (8) Cached data Requested data Result Description File Cached data (*) : If JMA data is available in CMA cache, Service node of CMA reply without sending request to JMA note. 17
6. Internet portal 1. 2. 3. 4. 5. 6. 7. 8. Background Overview Providing datasets Metadata synchronization Remote data request Internet portal Web feed (ATOM) 18 Plan
Beijing WIS Portal (Search & Directory) • Users can search Metadata by keyword Display Metadata and directory hierarchy. Keywords & Period search directory hierarchy Show original XML 19
Tokyo WIS Portal (Search) • Users can search Metadata by keyword. Keywords such as SYNOP global, SATAID, US, BABJ, typhoon Display Metadata Show original XML 20
Beijing WIS Portal for retrieve • Users can easily get data such as a GTS bulletin. Archive file 21
Tokyo WIS Portal for retrieve • Users can easily get data such as a satellite image. Invertible between 22 data and metadata
7. Web feed (ATOM) 1. 2. 3. 4. 5. 6. 7. 8. Background Overview Providing datasets Metadata synchronization Remote data request Internet portal Web feed (ATOM) 23 Plan
Web feeds (Atom) • Users can check for updates from Feed. Subscribe the feed by feed reader (Aggregator) 24
ATOM Feed reader example • Users can check for updates of the Metadata from Feed. • Users can also get such Keyword as ‘SM’ 25
8. Plan 1. 2. 3. 4. 5. 6. 7. 8. Background Overview Providing datasets Metadata synchronization Remote data request Internet portal Web feed (ATOM) 26 Plan
Plan for Collaboration • Metadata synchronization – FTP get (PULL) : 2008, 2 Q (Done) – OAI-PMH : 2008, 3 Q • Remote data request – Remote data request : 2008, 2 Q 27
Thank you 28
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