Authors: Amy L. Griffin, Seth E. Spielman, Nicholas N. Nagle, Jason Jurjevich, Meg Merrick, David C. Folch
Abstract: Maps are often made without the explicit inclusion of the uncertainty in the mapped data. Map readers, in turn, often assume that mapped information is accurate and certain. Developments in the methodology used to generate population estimates in the United States have led to an increase in the attribute uncertainty associated with many small area estimates. Therefore, adequately communicating this uncertainty is of increasing importance to making quality decisions based upon population estimates. We report here on a context-of-use study that informed the design of a visualization that planners can use to understand the uncertainty in mapped estimates. We are currently undertaking a user study to assess the extent to which planners a) understand the mapped uncertainties from the visualizations and b) draw upon the uncertainty information when making decisions with the uncertain data.