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SeaDataNet Web Services

This course provides an overview of SeaDataNet Web Services developed by the British Oceanographic Data Centre (BODC). It covers the various web services either deployed or in development, including the Vocabulary Server that offers access to controlled vocabularies for projects like SeaDataNet and NERC DataGrid. The course also discusses the Marsden Square to Coverage Converter and the EDMO catalogue web service by Maris. With practical examples and documentation links, it highlights how these services facilitate distributed data systems within SeaDataNet.

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SeaDataNet Web Services

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  1. SeaDataNet Training Course SeaDataNet Web Services Roy Lowry British Oceanographic Data Centre

  2. Overview • Web Services deployed or under development • BODC • Maris • Plans for Web Service use in SeaDataNet

  3. BODC Web Services • Vocabulary Server • Provides access to a large number of controlled vocabularies managed by BODC on behalf of projects such as SeaDataNet, NERC DataGrid and MarineXML • API is documented at http://www.bodc.ac.uk/products/web_services/vocab/ • Test client available at • http://vocab.ndg.nerc.ac.uk/client/vocabServer.jsp • Maris client application available at • http://seadatanet.maris2.nl/v_bodc_vocab/welcome.asp

  4. BODC Web Services • Marsden Square to Coverage Converter • Converts this: 25 26 (a list of Marsden Square numbers) • To this: <Spatial_Coverage> <Southernmost_latitude>0.0</Southernmost_latitude> <Northenmost_latitude>10.0</Northenmost_latitude> <Westernmost_longitude>100.0</Westernmost_longitude> <Easternmost_longitude>120.0</Easternmost_longitude> </Spatial_Coverage> • API documented at • http://www.bodc.ac.uk/products/web_services/msq2cov/ • Test client available at • http://grid.bodc.nerc.ac.uk/bodc/MSQRequest.html

  5. Maris Web Services • A Web Service interface to the EDMO catalogue (SeaDataNet organisation address book) has been developed by Maris • Documentation available at: http://seadatanet.maris2.nl/ws/ws_edmo.asmx • WSDL available at http://seadatanet.maris2.nl/ws/ws_edmo.asmx?wsdl

  6. Web Service Plans • Web Services provide an excellent technical solution for distributed data systems • Metadata or data access service is deployed at each node • Applications simply poll each instance of the service • Service client code can be embedded into any kind of application – web browser display, data visualisation tool, numerical model and so on • Therefore well-suited to the needs of SeaDataNet

  7. Web Service Plans • The SeaDataNet Technical task Team has already decided to post Web Services as interfaces to the metadata repositories • Once we develop the design architecture I am certain web services will be developed for AAA (security) and data delivery

  8. That’s All Folks! Questions or the Bar?

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