Challenges in the Accessibility of Data Visualization: Lessons from an Evaluation of a Dam Safety System

• Delvani A. Mateus Federal University of Lavras http://orcid.org/0000-0002-5832-3115
• Fábio A. C. da Silva Federal University of Lavras https://orcid.org/0000-0002-7359-1804
• Bruna Santana Capeleti Federal University of Lavras https://orcid.org/0009-0008-2037-9691
• Juliana B. dos S. França Federal University of Rio de Janeiro https://orcid.org/0000-0001-6300-8139
• Caroline Q. Santos Federal University of the Jequitinhonha and Mucuri Valleys http://orcid.org/0000-0001-9289-3421
• André P. Freire Federal University of Lavras https://orcid.org/0000-0001-7894-9740

DOI: https://doi.org/10.5753/ihc.2025.10922

Abstract

Introduction: Data visualization is vital for data exploration, and ensuring its accessibility for all, especially those with disabilities, is crucial; however, despite existing web accessibility guidelines, specific guidance for data visualization remains limited. Objective: To assess the accessibility of a Brazilian dam safety data platform. Methodology: An expert inspection was conducted using screen readers to evaluate the platform’s compliance and usability. Results: Findings revealed issues with unobserved web accessibility guidelines, inherent inaccessibility in off-the-shelf data exploration components, and design choices that complicate interactive data exploration for visually impaired users, offering insights into accessibility challenges in data visualization and underscoring the need for more comprehensive guidelines and future research.

Keywords: Accessibility, Data Visualization, Geographical data, Human-Data Interaction, Dam Safety

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