® © 2009 Open Geospatial Consortium, Inc. Hydrology DWG Tentative Work Plan 71st OGC Technical Committee Mountain View, CA. USA Ilya Zaslavsky, David Lemon, Ulrich Looser December 8, 2009 Sponsored and hosted by

OGC ® © 2009 Open Geospatial Consortium, Inc.2 Expected Outcomes Very tentative – for discussion at this and subsequent meetings. On the wiki: The focus of the group is analyzing and understanding requirements and use cases for hydrologic data integration, development of domain models and standards (where standardization is justified) for data exchange in the areas of hydrology and water resources, and establishment of a community consensus-building process to support adoption and proliferation of the standards. We expect that outcomes of DWG work will match WMO needs and is considered for adoption by WMO, as well as by developers of hydrologic data management software. 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

OGC ® 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), SWE (on real time data management) – how? © 2009 Open Geospatial Consortium, Inc.3

OGC ® © 2009 Open Geospatial Consortium, Inc.4 Sub-groups and IEs: focus, size, management 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. For this, it may be useful to have a workshop of IEs (once we have them going, ie. 2 nd half of 2010). Another cross-IE communication is having overlapping members and/or observers. –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.

OGC ® © 2009 Open Geospatial Consortium, Inc.5 Timeline Let’s envision what we can do in two years September 2009: Discussion paper on harmonization of water data exchange formats (1st version) ; IE1 announced December 2009: Update on the harmonization report; Proposed WaterML 2.0 schema announced; IE1 officially launched, IEs 2-3 announced and IE teams formed; Work plan discussed and adopted March 2010: WaterML 2.0 submitted as a discussion paper ; IE2 launched (to be reported 3/11); AIP team formed; Ontology task force started (with GRDC, CSIRO, CUAHSI, others) June 2010: IE1 preliminary report;IE3 launched September 2010: HDWG workshop focused on IEs (who will host?); IE2 preliminary report December 2010: IE1 final report, a best practice paper based on the results March 2011: IE2 final report, and a paper June 2012: IE3 final report, and a paper September 2012: Results of AIP; technical report

OGC ® Milestones March 2010 –CSIRO – coordinator for Surface Water June 2010 September 2010 December 2010 © 2009 Open Geospatial Consortium, Inc.6