How do users deal with the indirect evaluation of geospatial data sets quality
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Abstract
The increasing availability of geospatial datasets throughout Web services granted access to content that users considered inexistent as well as restricted to specific personnel. With Catalog Services for Web (CSW), metadata are documented and distributed according to well-known specified structures, supporting users in querying Spatial Data Infrastructures’ (SDI) repositories to reach the required resource. Data quality metadata elements carry useful information to assess the fitness of a dataset to a particular application either by evaluating data quality reports or by performing an indirect evaluation, based on the user’s previous experiences as well as on the application domain. Consequently, quality assessment is not based on well-known objective indicators and considers parameters subject to some level of uncertainty while filling such content. This paper aims at identifying which metadata elements carry the implicit sense of quality for geospatial resources, useful to subsidize the indirect quality evaluation process. Different kinds of users answered a questionnaire regarding their impressions about the metadata elements Purpose, Statement, Process Steps, Sources, and Organization Name to provide the input for the Analytical Hierarchy Process. Preliminary results highlight the relevance of filling Process Steps, Sources and Purpose metadata elements.
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