Sommaire de la publication

Sommaire de la publication

Devillers, R., M. Gervais, R. Jeansoulin & Y. BĂ©dard, 2002, Spatial data quality: from metadata to quality indicators and contextual end-user manual, OEEPE/International Society for Photogrammetry and Remote Sensing (ISPRS) Workshop on Spatial Data Quality Management, 10p, March, 21-22




The context within which geospatial data are used has changed significantly during the
past ten years. Users have now easier access to geospatial data but typically have less
knowledge in the geographical information domain, so have limited knowledge of the
risk related to the use of geospatial data. This sometimes leads to faulty decisionmaking
that may have significant consequences. In order to reduce these risks,
geospatial data producers provide metadata to help users to assess the fitness for use of
the data they are using within the context of their application. However, experience
shows that these metadata have several limitations and do not reach their information
goal for this new group of non-expert users. In addition, geospatial data are becoming a
mass product that has to follow legal requirements related to this class of products.
Metadata, as currently defined, do not reach these obligations, especially concerning the
requirements for easily understood information about product specifications and
potential risks of misuse. This paper describe an approach that aims to reduce these
risks of misuse by comparing data producers specifications and data users needs and
providing indicators describing data quality to users. The system, named
Multidimensional User Manual (MUM), allows the management of geospatial data
quality and the communication of the quality information using indicators that can be
analysed at different levels of detail.