ogc/wmo hydrology domain working group or how too many dave’s is never enough ilya zaslavsky,...
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OGC/WMO Hydrology Domain Working Group
or
How Too Many Dave’s is Never Enough
Ilya Zaslavsky, David Lemon, Ulrich Looser
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What is it?
• A joint working group of the Open Geospatial Consortium (OGC) and World Meteorological Organisation (WMO) constituted as an OGC Domain Working Group.
• Brings together interested parties to develop and promote the technology for greatly improving the way in which water information is described and shared.
• Co-chaired by representatives nominated by the OGC TC and the World Meteorological Organisation’s (WMO) Commission for Hydrology (CHy).
• Current Co-Chairs: Ilya Zaslavsky (SDSC), Ulrich Looser (GRDC) and David Lemon (CSIRO),
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Purpose
• To provide a venue and mechanism for seeking technical and institutional solutions to the challenge of describing and exchanging data describing the state and location of water resources, both above and below the ground surface.
• The path to adoption will be through OGC papers and standards, advanced to ISO where appropriate, and also through the WMO’s Chy and WIS activities.
• The Hydrology DWG will provide a means of developing candidate standards for adoption by CHy as appropriate.
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RainfallWater quantity
Groundwater
Water Observations Data
Meteorology
Soil water
Water quality
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Sources of Observations Data
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History
• March 2007– CUAHSI submit WaterML as OGC Discussion paper
• Sept 2007– Meeting of a group calling itself IWDIF (International Water Data
Interoperability Forum) held in Canberra– Over 3 days discussed need to international water data standards– WMO (Chy) represented by Aus BOM– Report (Cox and Brodaric 2007)
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CUAHSI Water Data Services
43 services15,000 variables1.8 million sites9 million series4.3 billion data
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History
• Early 2008– Much discussion between CSIRO, CUAHSI and OGC– Leads to meeting with WMO Chy President in July in Canberra
• September 2008– First ad-hoc held in Atlanta– Presentations from CUAHSI and CSIRO– Discussion about value of group– Agreed to develop charter.
• December 2008– Second ad-hoc in Valencia– TC requires changes to charter
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History• March 2009
– Third ad-hoc in Athens– Many presentations– TC agrees to charter – the DWG is formed
• June 2009– First official meeting in Boston– Ilya elected OGC co-chair– Groundwater IE proposed (USGS, CanadianGS, CSIRO, CUAHSI +
partners)
• July 2009– David and Ulrich nominated by WMO– This requires amendment to charter
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History
• September 2009– Meeting in Darmstadt– Changes to charter agreed – Ulrich and David confirmed– Presentation of Water Data Exchange Formats Harmonisation
Report by CSIRO/CUAHSI• Continuously updated• Includes efforts from many countries
• December 2009– Meeting in Mountain View (California)– Update on Groundwater IE– Surface Water IE proposed (Peter Fitch from CSIRO organizing)
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First workshop of the OGC/WMO Hydro DWG to be held in Ispra, Italy, 15-18 March 2010
– 26 participants confirmed:• European JRC; OGC, US Geological Survey, Geological Survey of
Canada, CSIRO (Australia), Bureau of Meteorology (Australia), CUAHSI (USA), Federal Institute of Hydrology (Germany), 52North, Kisters, Centre for Ecology and Hydrology (UK), International Office for Water (France), Deltares USA, disy Informationssysteme Gmbh (Germany), BRGM (France), ESRI, Swedish Univ of Agricultural Sciences, IDSIA (Switzerland), Global Runoff Data Centre (Germany), UNESCO-IHE (Netherlands)
– Focus on:• WaterML 2.0• Groundwater IE• Surface Water IE• Model Integration• Information Model for Water
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© 2009 Open Geospatial Consortium, Inc.
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Expected HDWG Outcomes
• The main expected outcome is a common model for exchanging hydrologic data, which includes: – An agreed feature model (ie. what are the features of the hydrosphere (from an
information perspective) and how are they related.) – An agreed observation model. – Agreed vocabularies, endorsed by the community, and by WMO in particular.
Agreeing on semantics is a long process, but we should be able to recommend some vocabularies
– Also: services carrying the above
=== analysis and understanding requirements and use cases for hydrologic data integration; establishment of a community consensus-building process to support adoption and proliferation of the standards
Very tentative work plan (to be updated at Ispra) – is athttp://external.opengis.org/twiki_public/bin/view/HydrologyDWG/HydroDWGWorkPlan
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HDWG Activities
• Analysis and harmonization of existing commonly used protocols and standards in the domain
• Interoperability Experiments (IEs) focused on selected sub-domains of water data (e.g. surface water, groundwater, water quality, water use, hydrologic forecasts, real time data), where teams of DWG members will pilot emerging water data standards and services, specifically addressing the three components above.
• Participation in GEO Architecture Implementation Pilots (AIPs), focused on broader scenarios within the entire domain and across domains
• Submission of discussion papers and best practice papers (the latter following IE and AIP experiences)
• Collaboration with other DWGs, in particular ESS (on modeling), MetOcean (on handling gridded data, forecasts), SWE (on real time data management)
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Sub-groups and IEs• Sub-groups:
– Design group: primarily responsible for driving WaterML 2.0 – Use case and testbed groups: IEs – Ontology/vocabulary task force
• IEs: so far, we’ve talked about 3 IEs: groundwater, surface water, water quality (but also: water use? Forecasts?...)– We expect that each IE will be about a year long. We hope that IE teams
will work in collaboration, to ensure that a common model is developed, or that there are justified reasons to diverge..
– Another organizational option is to have a single large IE, covering all the sub-domains
– Each IE is expected to address feature model in its sub-domain (sampling features, features of interest, cluster/aggregate features), the observation model (frequencies, sampling patterns, etc.), vocabularies, and services.
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First demo of Hydrology
IE-1
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Why too many Dave’s
• Many people involved, including:– David Maidment (CUAHSI)– David Valentine (CUAHSI)– David Tarboton (CUAHSI)– David Kinny (BOM)– David Schell (OGC)– David Arctur (OGC)– David Thomas (WMO)– David Lemon (CSIRO)