Requests from F. Blanc

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Requests from F. Blanc

• Retrieve information from each individual
  national reports and present this.
• 2. Data serving
• The HYCOM products are freely available daily 3D
  fields of the ocean state served daily at
  http//www.hycom.org/dataserver (hindcasts and
  8-day forecasts).
• Comment on the two GODAE papers (Blank et al,
  Haines et al).
• By agreeing upon common standards and
  conventions for describing data, and by
  encouraging data providers to provide common
  views of their data, complex datasets can be
  discovered, manipulated and understood with
  easy-to-use tools and web portals.
• Open GIS, ncWMS, GODIVA2?
• Report on last years actions in particular the
  need to enhance the national report on data
  serving. And for this I proposed to follow the
  Inspire guidelines and DMAC issues
• Cataloguing, discovery query functions,
  together with primary visualisation to understand
  and assess the products
• Data specification, metadata and inventory/time
  aggregation solutions (for interoperability)
• Delivery/extraction of numerical datasets (and
  their user commitments)
• Interoperable analysis and visualisation tools
  for data qualification, product comparison or
  science data use
• Tools for animations or intercative 4D plots
• Monitoring and reporting (product handling,
  operationality, usage report, user feedback)

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Report on Product Data servers

• Lack of visibility
• Impressed by internet services offered
• standalone catalogues
• primary viewing services
• interoperable extraction tools
• integrated

• Should be more promoted ? Catalogue of
  services (cf. GCMD)
• Ground common technology ? Access Inventory
  ? Opendap/Thredds NetCDF/CF ( GODAE
  standard)

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Report on Product Data servers

• Lack
• Missing user guidance
• System descriptions
• Guide for products,
• Guide for services,

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Report on Product Data servers

• Input in national reports
• ? available afterwards
• available online ? Using CMS technology ?
• not so homogeneous
• ? what do we expect from this report with
  respect to data servers ?
• What services on data are available
  (catalogue, viewing, delivery, user guidance)
• Report on operationality qualification wrt
  production
• Report on user (who, products requested, how
  often, for what for)
• Report on technology capacities (volume,
  handling, networking)
• Strong and weak features

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2) My Ocean Web Portal
Example
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Example
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What will be available at T18

• Good support for visualizing in situ obs
  (hopefully)
• (developed under ECOOP project)
• Map will show positions of observations
• User clicks on observation to find more detail
• (will require agreement upon file formats and
  metadata conventions for such data. Not yet
  covered by CF)
• Depends on being able to discover obs locations!!
• Dynamic interpolation from sigma to zed levels
• Support for non-map outputs such as vertical
  sections
• Needs discussion to establish priorities

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Anticipated final deployment
NetCDF
MFC 1
NetCDF
MFC 2
NetCDF
TAC 1
WMS bundled with THREDDS MFCs/TACs install
single piece of software
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Dynamic Quick View (DQV) Service

• Gives very fast previews of 4-D data on an
  interactive website
• Reads data from OPeNDAP servers at the MERSEA
  TEPs
• Draggable, zoomable map
• Allows the fast creation of animations
• Based on a standards-compliant Web Map Service

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Selection of depth
Select from all the depth levels of the model
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Selection of time (range)
Select from all the timesteps in the model
Selection of a time range leads to an animation
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Finding the data value at a point
Click on the data layer, data value and precise
position is shown
Lon -64.08 Lat 36.21 Value 19.27
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Timeseries plots
If a time range is selected, can create a
timeseries plot at a point
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Export to Google Earth

• DQV website contains link to load
  currently-visible data into Google Earth
• Our WMS outputs in KMZ format
• Can then view data alongside other KML datasets
• e.g. DAMOCLES
• Can view animations of data
• No problem with map projections!

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Visualize alongside third-party data

• Hurricane Katrina, August 2005
• Showing sea surface temperature (UK Met Office)
  and storm position/intensity (ECMWF)
• Winds cause upwelling of cooler subsurface water
  on right-hand side of the cyclonic storm track

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Selection of non-MERSEA datasets also available
Everything on the website can be exported to
Google Earth
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Important features of our WMS implementation

• Fast generation of images
• Handling of four-dimensional data
• Handling of data on unusual grids, e.g. NEMO
• Dynamic change of colour scale extent
• Generation of animations
• Export to Google Earth

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MERSEA data in third-party clients
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In-situ data

• Picture left shows comparison of NEMO model and
  observations for Nov 2004
• Red dots show bad model-obs fits, green dots are
  good fits
• Google Earth allows very efficient browsing of
  these large datasets
• Could do the same for MERSEA systems, e.g.
  CORIOLIS
• Could read obs and model data from different
  sources and bring together in Google Earth or
  another client

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DQV future enhancements

• Display of wind/current fields as vectors
• Caching of image tiles for performance increase
• Support for more map projections
• E.g. polar stereographic
• Display of observations on website
• Integration with GeoServer, THREDDS
• Requires community assistance
• Lots more!

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Summary

• Lots going on
• Section II of report is important
• Guidance to users is required on how to get/use
  tools
• Need a master directory