Known unknowns: representing uncertainty in historical time

Abstract
Historic time is inherently uncertain, with missing, disputed, doubtful or ill-defined dates for objects and events. Yet digital timeline visualisations tend to represent it as exact and of undisputed confidence. This is partly due to a lack of awareness, partly due to a lack of support for ambiguities in digital data types and modes of representation. We outline some of the issues around uncertainty in timeline visualisation and ways of addressing them.
Authors
Florian Kräutli and Stephen Boyd Davis
Cite
Kräutli, F. & Boyd Davis, S., 2013. Known unknowns: representing uncertainty in historical time. In K. Ng, J. P. Bowen, & S. McDaid, eds., Proceedings of EVA London. London: BCS Learning and Development Ltd, pp. 61–68. Available at http://ewic.bcs.org/content/ConWebDoc/50996