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Metadata are of great value in data and services evaluation, but are often incomplete or patchy, and the available standards do not include all the features which users require for evaluation. We describe a quality model with supporting tools and services produced during the GeoViQua FP7 project that later evolved in the Open Geospatial Consortium (OGC) Standards development process. The model and associated tools practically allow users to more effectively assess the fitness-for-purpose of resources. This enrichment uses two metadata extensions: on one side those regarding producer quality model (PQM) which permits both quantitative and qualitative data quality documentation (e.g., discovered issues, workarounds, usage, citations, goodness-of-fit statistics, validation) and, on the other side, from the user perspective to provide a wide variety of feedback and reviews relating to their use of data in their specific domains. To maximise interoperability and usability in the geospatial domain, the PQM extends the ISO standards 19115-1, 19115-2 and 19157. The user feedback model was created on GVQ project, and was matured in OGC that recently approved two international standards: Geospatial User Feedback (GUF) Conceptual Model and GUF XML encoding Standard. User feedback is of paramount importance as it is a direct mechanism to raise users’ voices and promote interaction between users and data providers. Users will be more engaged with INSPIRE activities if they can see a real opportunity to create a community and establish social links on the Spatial Data Infrastructure and around the resources in which they are interested. The data producers may take advantage of this by reacting to users’ demands, in creating new versions of the resources or answering their concerns as new feedback items. To effectively promote this metadata extension, the MiraMon Metadata Editor, GeMM, has been developed to allow metadata documentation including not only ISO metadata but also PQM and GUF models. This tool uses XML metadata files and allows their modification. The tool dynamically connects to a User Feedback service that stores user feedback linked to the original datasets (by means of identifiers). This approach allows a single user-feedback server to centralize feedback from datasets originally saved in different locations. In the future, this service could became the basis of a general used feedback in a general context such as INSPIRE or the GEOSS Common Infrastructure (GCI).
Topic Area: [2.9] Challenges and approaches to standardization of data and interoperability of systems. Abstract Type: Oral Presentation
Comments: Metadata, quality, user feedback, ISO standards, GeMM
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