GEOVIQUA

QUAlity aware VIsualisation for the Global Earth Observation system of systems

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 Obiettivo del progetto (Objective)

'The GEOSS Common Infrastructure provides clearinghouses and portals that allow discovery and visualisation of data in an integrated way. GEOVIQUA will extend the GEOSS infrastructure by adding well-defined data quality indicators and quality-enabled search and visualisation tools. These GEOVIQUA components will be implemented so they can be accessed based on existing geo-portal standards and in the mass market 'Google-like' map tools and other 3D viewers, as well as on mobile devices. The design and development of GEOVIQUA components will be undertaken in collaboration with the relevant GEO committees, the Open Geospatial Consortium Architecture Implementation Pilots and other relevant standards committees.

Data quality will be extracted from metadata, from provenance information, from the reference data, from validation with in-situ sensors and from expert user comments. Existing quality standards will be used or extended to formalise the quality indicators and provenance in line with the Quality Assurance for Earth Observation (QA4EO) framework and taken forward into the standardisation process.

Graphical representation of metadata will allow users to easily screen data. Search functions will be augmented using quality indicators and search results will be able to be ranked by quality indicator. The work will contribute to a GEO S&T label increasing user trust in GEO product quality.

Components will be developed to visualise data and associated quality information on GEO portals using different strategies. Work will link quality indicators and data in web map services and “Google like” tools, and make these available on mobile devices.

Several pilot case studies ranging from local to global scales concerning many key Societal Benefit Areas will be used to motivate and validate the GEOVIQUA developments. The Global Carbon Project and the European Space Agency will link GEOVIQUA to the Communities of Practices in GEO, disseminating the results widely.'

Introduzione (Teaser)

The Global Earth Observation System of Systems (GEOSS) links together existing and planned observation systems around the world in nine critical areas. EU funding facilitated integration of vital quality indicators into data and graphics.

Descrizione progetto (Article)

The GEOSS common infrastructure provides a GEO portal and search engines. Users now have a single Internet access point to data, imagery and analysis of information from all parts of the globe. Network interoperability is ensured by a common set of data standards. With EU funding of the project 'Quality aware visualisation for the global Earth observation system of systems' (http://www.geoviqua.org/ (GEOVIQUA)) , scientists expanded the GEOSS to include rigorous data quality indicators integrated with quality-enabled search and visualisation tools.

Searches can be filtered based on quality criteria. Quality information is displayed together with data in a format compatible with existing GEO portal standards and mass-market mapping tools such as Google Earth. A user feedback system is implemented to capitalise on the wealth of knowledge and experience of individual users. Their sheer numbers should ensure quality is maintained and potential issues are highlighted.

Researchers successfully extracted quality indicators from the main EO metadata formats and converted them into useful layers for compatibility with developed graphical representation tools. In addition, the team developed models of quality-enhanced producer metadata exploiting International Standards Organisation standards. The models enable encoding of reference data, citations, and issues discovered in metadata documents. Tools provide formal uncertainty estimates.

GEOVIQUA has actively contributed to an enhanced GEO label with increased user trustworthiness. From their desks, users will have access to the same phenomenally huge EO data sets and tools, now enhanced with the trustworthiness required for sustainability.