Global Drought Monitoring Service through the GEOSS Architecture ...
Global Drought Monitoring Service through the GEOSS Architecture ...
Global Drought Monitoring Service through the GEOSS Architecture ...
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Architectural Implementation Pilot, Phase 3 Version: 2.0<br />
<strong>Global</strong> <strong>Drought</strong> <strong>Monitoring</strong> and European <strong>Drought</strong><br />
Observatory-Water SBA Engineering Report<br />
Date: 11/Feb/2011<br />
OGC CSW ISO AP, published by <strong>the</strong> Euro<strong>GEOSS</strong> Discovery Broker<br />
W3C SPARQL, published by <strong>the</strong> GENESIS SKOS repository<br />
OpenSearch interface (with geo, temporal and semantic extensions), published by<br />
<strong>the</strong> Euro<strong>GEOSS</strong> DAC<br />
Use of <strong>the</strong> <strong>GEOSS</strong> Common Infrastructure (GCI):<br />
The Euro<strong>GEOSS</strong> discovery broker is registered in <strong>the</strong> GCI. It is accessible <strong>through</strong> <strong>the</strong> GEO<br />
Portal using <strong>the</strong> following standard interfaces:<br />
CSW/ISO 2.0.2<br />
CSW/ebRIM-EO 2.0.2<br />
OpenSearch with Geo and Time extensions<br />
5.9 Post Deployment Activities<br />
5.9.1 Ontology Engineering<br />
As noted in Section 5.4.1, <strong>the</strong> CUAHSI version 1 46 water ontology contains <strong>the</strong><br />
subclasses of surface hydrology, subsurface hydrology, atmospheric hydrology, land, water<br />
quality, aquatic biology, and infrastructure subclasses, but it lacks an extensively developed<br />
subsurface water subclass and surface subclassification. CUAHSI is preparing to revise and<br />
update a version 2 release of <strong>the</strong> water ontology, but not in time for AIP-3. Correspondingly,<br />
some development work was undertaken, along with more expected for AIP-4, in preparing a<br />
specialized drought module for <strong>the</strong> CUAHSI water ontology.<br />
A concise overview of <strong>the</strong> documentation for <strong>the</strong>se modules follows. However, a standalone<br />
drought vocabulary was prepared to use within <strong>the</strong> Euro<strong>GEOSS</strong> search tools built into <strong>the</strong><br />
European <strong>Drought</strong> Observatory. This stand-alone drought vocabulary is already operational and<br />
provides <strong>the</strong> tool to test whe<strong>the</strong>r concept-oriented drought searches improve retrieval of drought<br />
information for users—structuring a tool to facilitate <strong>the</strong> user, as in section 3.2.4. The<br />
operational tool and its search results are reviewed in section 6.<br />
The ontology documentation is provided here. Every water domain specialist, drought<br />
specialist, hydraulic engineer, land surface modeler, hydrologist, and ecologist will recognize<br />
two basic equations: <strong>the</strong> surface water equation and <strong>the</strong> surface energy equation. The<br />
“atmospheric hydrology” concept contains subclasses “precipitation” and “radiation” and “wind”<br />
(which creates mechanical turbulence and affects turbulent transfer of water vapor fluxes of<br />
evaporated water back to <strong>the</strong> atmosphere.<br />
A starting point for more comprehensive water ontology is to build upon <strong>the</strong> ALMA<br />
convention. 47 The ALMA convention has also been used in <strong>the</strong> distributed hydrologic model<br />
intercomparison experiments undertaken by <strong>the</strong> EU Water and Climate Change (EU-WATCH). 48<br />
46 http://water.sdsc.edu/hiscentral/startree.html<br />
47 http://web.lmd.jussieu.fr/~polcher/ALMA/<br />
48 http://www.eu-watch.org/templates/dispatcher.asp?page_id=25222765<br />
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