Empowering Facility Managers: Multimodal Location-Based Visualization for Smart Sanitizer Dispensers Management Topics: Human-Centered Aspects of Visualization; Usability and Empirical Studies of Visualizations; Visualization Applications In Proceedings of the 20th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications - Volume 1 GRAPP, HUCAPP and IVAPP: IVAPP, 815-822, 2025 , Porto, Portugal