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Spatialization Design: Comparing Points and Landscapes
November/December 2007 (vol. 13 no. 6)
pp. 1262-1269
Spatializations represent non-spatial data using a spatial layout similar to a map. We present an experiment comparing different visual representations of spatialized data, to determine which representations are best for a non-trivial search and point estimation task. Primarily, we compare point-based displays to 2D and 3D information landscapes. We also compare a colour (hue) scale to a grey (lightness) scale. For the task we studied, point-based spatializations were far superior to landscapes, and 2D landscapes were superior to 3D landscapes. Little or no benefit was found for redundantly encoding data using colour or greyscale combined with landscape height. 3D landscapes with no colour scale (height-only) were particularly slow and inaccurate. A colour scale was found to be better than a greyscale for all display types, but a greyscale was helpful compared to height-only. These results suggest that point-based spatializations should be chosen over landscape representations, at least for tasks involving only point data itself rather than derived information about the data space.

[1] U. Bischoff, N. Diakopoulos, F. Lösch, and Y. Zhou, ThemeExplorer: A Tool for Understanding the History of the Field of Information Visualization. InfoVisFun 2004, October 2004.
[2] U. Brandes and T. Willhalm, Visualization of bibliographic networks with a reshaped landscape metaphor. In Proceedings of the Symposium on Data Visualization (VisSym '02), pages 159–164, 2002.
[3] C.M. Carswell and C.D. Wickens, Information integration and the object display: and interaction of task demands and display superiority. Ergonomics, 30 (3): 511–527, 1987.
[4] M. Chalmers, Using a landscape metaphor to represent a corpus of documents. In Proceedings of the European Conference on Spatial Information Theory (COSIT '93), volume 716 of Lecture Notes in Computer Science, pages 377–390, September 1993.
[5] T. Cribbin and C. Chen, Visual-spatial exploration of thematic spaces: a comparative study of three visualisation models. In Electronic Imaging 2001: Visual Data Exploration and Analysis VIII, pages 199–209, January 2001.
[6] A. Cockburn and B. McKenzie, Evaluating the effectiveness of spatial memory in 2D and 3D physical and virtual environments. In Proceedings of the SIGCHI Conference on Human Factors in Computing Systems (CHI '02), pages 203–210, April 2002.
[7] F.H. Durgin, (1995). Texture density adaptation and the perceived numerosity and distribution of texture. In Journal of Experimental Psychology: Human Perception and Performance, volume 21, pages 149–169, 1995.
[8] S. I. Fabrikant, Spatial metaphors for browsing large data archives. Ph.D. thesis. University of Colorado-Boulder, Boulder, CO, 2000.
[9] S.I. Fabrikant, D.R. Montello, and D.M. Mark, The distance-similarity metaphor in region-display spatializations. IEEE Computer Graphics and Applications, 26 (4): 34–44, July/August 2006.
[10] S.I. Fabrikant, D.R. Montello, M. Ruocco, and R.S. Middleton, The distance-similarity metaphor in network-display spatializations. Cartography and Geographic Information Science, 31 (4): 237–252, 2004.
[11] M. Granitzer, W. Kienreich, V. Sabol, K. Andrews, and W. Klieber, Evaluating a system for interactive exploration of large, hierarchically structured document repositories. In Proceedings of the IEEE Symposium on information Visualization (InfoVis'04), pages 127–134, October 2004.
[12] C.G. Healey, K.S. Booth, and J.T. Enns, High-speed visual estimation using preattentive processing. ACM Transactions on Computer-Human Interaction, 3 (2): 107–135, 1996.
[13] E. Hetzler and A. Turner, Analysis experiences using information visualization. IEEE Computer Graphics and Applications, 24 (5): 22–26, September 2004.
[14] K. Hornbæk and E. Frøkjær, Do thematic maps improve information retrieval? In the Seventh IFIP Conference on Human-Computer Interaction (INTERACT'99), pages 179–186, August 1999.
[15] S. Ishihara, Ishihara's test for colour blindness. Found at http://www.toledo-bend.com/colorblindIshihara.html , 2007.
[16] D.R. Montello, S.I. Fabrikant, M. Ruocco, and R.S. Middleton, Testing the First Law of Cognitive Geography on Point-Display Spatializations. In Proceedings of the Conference on Spatial Information Theory (COSIT '03), pages 316–331, September 2003.
[17] G. B. Newby, Empirical study of a 3D visualization for information retrieval tasks. Journal of Intelligent Information Systems, 18 (1): 31–53, January 2002.
[18] L. Nowell, R. Schulman, and D. Hix, Graphical Encoding for Information Visualization: An Empirical Study. In Proceedings of the IEEE Symposium on Information Visualization (InfoVis'02), pages 43–50, October 2002.
[19] B.E. Rogowitz and L.A. Treinish, How not to lie with visualization. Computers in Physics, 10 (3): 268–274, May/June 1996.
[20] W. Schroeder, K. Martin, and W. Lorensen, The Visualization Toolkit, Prentice Hall PTR, second edition, 1998.
[21] R. Spence, Information Visualization, Addison Wesley Publishers, first edition, 2000.
[22] C. Ware, Information Visualization: Perception for Design. Morgan Kaufmann Publishers, second edition, 2004.
[23] S.J. Westerman and T. Cribbin, Mapping semantic information in virtual space: dimensions, variance and individual differences. International Journal of Human Computer Studies, 53 (5): 765–787, November 2000.
[24] M. Williams and T. Munzner, Steerable, progressive, multidimensional scaling. In Proceedings of the IEEE Symposium on Information Visualization (InfoVis'04), pages 57–64, October 2004.
[25] J. A. Wise, J.J. Thomas, K. Pennock, D. Lantrip, M. Pottier, A. Schur, and V. Crow, Visualizing the non-visual: spatial analysis and interaction with information from text documents. In Proceedings of the IEEE Symposium on Information Visualization (InfoVis'95), pages 51–58, October 1995.

Index Terms:
Spatialization, Information Landscape, User Study, Numerosity, 3D, 2D, Colour, Greyscale, Surface, Points
Citation:
Melanie Tory, David Sprague, Fuqu Wu, Wing Yan So, Tamara Munzner, "Spatialization Design: Comparing Points and Landscapes," IEEE Transactions on Visualization and Computer Graphics, vol. 13, no. 6, pp. 1262-1269, Nov.-Dec. 2007, doi:10.1109/TVCG.2007.70596
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