Global Drought Monitoring Service through the GEOSS Architecture ...

Architectural Implementation Pilot, Phase 3 Version: 2.0
Global Drought Monitoring and European Drought
Observatory-Water SBA Engineering Report
Date: 11/Feb/2011
5.1.6 Context and pre-conditions
Some of the existing Global Earth Observation System of System functionality has been
described above. This section will provide further documentation of EuroGEOSS in providing
components supporting advanced search and discovery. The following datasets and services are
assumed to be available before the scenario begins:
• GEO Portal, through this portal the end user will be able to search, find and access
the services which are needed for the Scenario execution;
• EuroGEOSS/GENESIS Client Application is registered on the Components and
Services Registry (CSR) and accessible through the GEO Portal;
• EuroGEOSS Discovery Augmentation Component (DAC) Service. This service
federates both semantics (e.g. SKOS repositories) and ISO-compliant geospatial
catalog services. The DAC can be queried using common geospatial constraints (i.e.
what, where, when, etc.). The service exposes a semantics-extended OpenSearch
interface.
• EuroGEOSS Discovery Broker Service. This is a distributed catalogue which
federates several services (exposing them through the CSW-ISO interface). Federated
services publish the following datasets:
o Environmental datasets (WCS);
o Climate Change datasets (WCS);
• GENESIS Vocabulary Service. This repository publishes a SPARQL interface for
navigating the aforementioned SKOS-based thesauri.
• WPS Client. This is web client for configuring and running data retrieval for graph
construction through the European Drought Observatory
• GEOSS Ontology Registry
• GEOSS Geographic Gazetteer
• Application (WPS): the search interface is designed to be accessible through the
European Drought Observatory (EDO) portal interface
• A workflow engine. This component manages all phases of the scenario (browse
semantic repository, retrieve concepts of interest, search for resources related to such
concepts, execute WPS)
5.2 Implementation of the European Regional Drought Semantic-enhanced Monitoring and
Information System
The Drought Scenario that has been used for AIP-3 was originally introduced within
presentations of Barbara Hofer and Stefan Niemeyer (European Drought Observatory),
“EuroGEOSS for Drought--Linking the EDO to Local and Global Scales,” at the INSPIRE
conference in June 2010 and “Drought Data, Metadata, and Interoperability,” at the Training
Workshop on Drought Risk Assessment for the Agricultural Sector in September 2010. These
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