Usability Study Applied to the National Spatial Data Infrastructure (INDE) Geoportal Considering the Role of Stakeholders
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Abstract
The National Spatial Data Infrastructure (NSDI), was established to coordinate users, producers and regulators of geoinformation use, called stakeholders or interested parties. This work is focused on the relationship between performance and cognitive workload with the role that the role plays in the NSDI, exploring usability problems related to access to data and metadata in the geoportal. The stakeholders were characterized as data users (U), data users and producers (UP), or data users, producers and providers (UPP). The methodology applied was the unmoderated questionnaire, divided into open and closed type questions that enabled qualitative and quantitative data collection. The NASA Task Load Index (NASA-TLX) was applied to evaluate the workload. It was noticeable that the individuals in group U presented a higher workload than the other stakeholders. This study made it possible to infer a relationship between performance on tasks involving the use of data with workload and usability problems related to data access. The study contributes with evidence from usability tests with users who interacted with the NSDI geoportal, showing a strong relationship with the stakeholder's role in the NSDI. The usability varied widely among the user profiles, indicating that the geoportal interface needs improvements or own interfaces built from the concepts of user-centred Design, to better meet each group's specific needs.
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