® Hosted and Sponsored by ESA/ESRIN Progress towards a standard WMO Hydrologic Metadata Model 86th OGC Technical Committee Frascati, Italy Irina Dornblut,

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Presentation transcript:

® Hosted and Sponsored by ESA/ESRIN Progress towards a standard WMO Hydrologic Metadata Model 86th OGC Technical Committee Frascati, Italy Irina Dornblut, WMO, GRDC 23 September 2013 Copyright © 2013 Open Geospatial Consortium

OGC ® GRDC Hydrologic Metadata WMO Context and Background Basic Concept Next Steps UML diagrams –representationInfo –lineageInfo –contentInfo –HydrologicVariable –DataGenerationProcess Copyright © 2013 Open Geospatial Consortium

OGC ® WMO Context and Background WMO Technical Commission for Hydrology (WMO CHy) –Thematic area: Data operations and management (since Nov 2012) Monitor and report on new developments dealing with data management issues, review progress with respect to the exchange of hydrological data and products, guide harmonization of practices –CHy-13(2008): GRDC Hydrologic Metadata (first draft) Intention to join data set description and observational information –CHy-14(2012): review of GRDC Hydrologic Metadata concepts Reflecting the developments in the HydrologyDWG WMO Information System (WIS) –WMO Core Metadata Profile of ISO19115(2003) WMO Integrated Global Observing System (WIGOS) –WIGOS Core Metadata (under development, 2013) Copyright © 2013 Open Geospatial Consortium

OGC ® GRDC Hydrologic data und products Collections of data: offered for global exchange, disseminated using services reporting physical, chemical and biological properties of waters above, on and below the Earth's surfaces (observation results) generated by further processing of “primary” data which are results of preceding source observations (information hierarchy: “secondary-observation” result) compiled in spatial or temporal coverages, exemplarily time series and maps created by the GRDC Copyright © 2013 Open Geospatial Consortium

OGC ® GRDC Hydrologic Metadata Copyright © 2013 Open Geospatial Consortium Shall be compliant to WMO Core Metadata Profile –Identification, content, lineage, … of the data set Shall consider the information hierarchy –Identification of the dataset as result of an observation –Identification of the “source observation” as the first process step Shall be applicable to time series (temporal coverages) –Describe temporal aggregation of data values (time sample) –Describe accumulation of time-related data values (time grid) Should provide the observational information –Station (sampling feature), hydrologic object under observation (sampled feature), instrument or model applied (procedure), variable (observed property).

OGC ® shall use the WMO Core Metadata profile of ISO Data identification info Distribution info Dissemination service Use constraints WMO data policy Maintenance info Updating “primary” data Quality info Reliability of “primary” data GRDC Hydrologic Metadata Copyright © 2013 Open Geospatial Consortium Lineage info Identify results from observation Representation info Identify time series Content info Time series description

OGC ® shall use the WMO Core Metadata profile of ISO Distribution info Dissemination service Use constraints WMO data policy Maintenance info Updating “primary” data Quality info Reliability of “primary” data GRDC Hydrologic Metadata Copyright © 2013 Open Geospatial Consortium Lineage info Identify results from observation Representation info Identify time series Content info Time series description

OGC ® with respect to time series Data identification info Distribution info Dissemination service Use constraints WMO data policy Maintenance info Updating “primary” data Quality info Reliability of “primary” data GRDC Hydrologic Metadata Copyright © 2013 Open Geospatial Consortium Lineage info Identify results from observation

OGC ® with respect to time series, resulting from observation Distribution info Dissemination service Use constraints WMO data policy Maintenance info Updating “primary” data Quality info Reliability of “primary” data GRDC Hydrologic Metadata Copyright © 2013 Open Geospatial Consortium

OGC ® with respect to time series, processed from “primary” data Distribution info Dissemination service Use constraints WMO data policy GRDC Hydrologic Metadata Copyright © 2013 Open Geospatial Consortium

OGC ® distributed by dissemination service under condition of WMO data policy GRDC Hydrologic Metadata Copyright © 2013 Open Geospatial Consortium

OGC ® TemporalGridRepresentation to identify time-series objects ISO defined within WaterML2P1

OGC ® contentInfo to describe time series and time series points Metadata defined in WaterML2P1 ISO

OGC ® LineageFromObservation relates observation results ISO ISO / WML2P1

OGC ® Observation description (application-specific) WaterML2P1

OGC ® HydrologicVariable – application-specific concept WaterML2P1

OGC ® DataGenerationProcess – application-specific concept WaterML2P1

OGC ® DataDissemination relates the data provided via service Attributes as required by the GRDC in data collection projects on regional or global scale HY_Features

OGC ® Next steps Oct/Nov 2013 –“Hydrologic Information – Metadata Concept” (GRDC Report) –WMO-CHy Discussion Forum (eForum) – Contribution (conceptual level) to WIS / WIGOS Metadata Dec 2013 –mapping to the metadata structures currently in use at GRDC –test implementation for the new GRDC data catalogue (depending on resources) Thank you !