Exploratory Analysis, Dynamic Statistical Visualization, and Geographic Information Systems

MacDougall, E. Bruce

doi:10.1559/152304092783721268

Cited by 82 publications

(21 citation statements)

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“…MacEachren, Brewer, and Pickle (1998) examined methods of reliability representation for choropleth maps. Slocum, Robeson, and Egbert (1990), MacEachren and DiBiase (1991), Egbert and Slocum (1992), MacDougall (1992), Monmonier (1992), Slocum and Egbert (1993), and MacEachren (1995) all discussed dynamic choropleth mapping of varied types.…”

Section: Other Choropleth Mapping Issuesmentioning

confidence: 99%

Evaluation of Methods for Classifying Epidemiological Data on Choropleth Maps in Series

Brewer

Pickle²

2002

Annals of the Association of American Geographers

329

165

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Our research goal was to determine which choropleth classification methods are most suitable for epidemiological rate maps. We compared seven methods using responses by fifty-six subjects in a two-part experiment involving nine series of U.S. mortality maps. Subjects answered a wide range of general map-reading questions that involved individual maps and comparisons among maps in a series. The questions addressed varied scales of map-reading, from individual enumeration units, to regions, to whole-map distributions. Quantiles and minimum boundary error classification methods were best suited for these general choropleth map-reading tasks. Natural breaks (Jenks) and a hybrid version of equal-intervals classing formed a second grouping in the results, both producing responses less than 70 percent as accurate as for quantiles. Using matched legends across a series of maps (when possible) increased map-comparison accuracy by approximately 28 percent. The advantages of careful optimization procedures in choropleth classification seem to offer no benefit over the simpler quantile method for the general map-reading tasks tested in the reported experiment.

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Section: Other Choropleth Mapping Issuesmentioning

confidence: 99%

Evaluation of Methods for Classifying Epidemiological Data on Choropleth Maps in Series

Brewer

Pickle²

2002

Annals of the Association of American Geographers

329

165

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“…The visualization of spectral analysis is readily integrated with the existing EDA toolbox, which contains more familiar graphic devices like histograms, scatterplots and scatterplot matrices, often with the ability to be manipulated dynamically. EDA techniques have been shown to be particularly eective tools for the examination of georeferenced data (Monmonier, 1989;MacDougall, 1992;Cook et al, 1996), and recent research extends graphical techniques such as scatterplots into multidimensional visualization of large spatial databases (Gahegan, 1998).…”

Section: Research Contextmentioning

confidence: 99%

Tools for visualizing properties of spatial and temporal periodicity in geographic data

Edsall

Harrower

Mennis

2000

Computers & Geosciences

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“…• A dynamic link between maps and other types of graphical displays through "brushing;" objects selected in one of the displays are simultaneously highlighted in all of them (MacDougall 1992;Symanzik et al 1996;Dykes 1997); • Tools for changing, in real time, parameters of conventional cartographic methods, such as…”

Section: Introductionmentioning

confidence: 99%

Testing the Usability of Interactive Maps in CommonGIS

Andrienko¹,

Andrienko²,

Voss³

et al. 2002

Cartography and Geographic Information Science

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ABSTRACT:The paper reports on an experimental study aimed at assessing the usability of five different interactive tools for exploratory analysis of geographically referenced data implemented in CommonGIS. Usability was assessed in terms of tool learnability, memorability, and user satisfaction. The study provided valuable data concerning the usability of each individual tool; we also derived some conclusions relevant to geovisualization techniques in general. We found that users were, in principle, able to understand and adopt the new ideas of map interactivity and manipulability. However, these ideas needed to be appropriately introduced; people could hardly grasp them just from the appearance of the maps and controls. An introductory demonstration was sufficient to understand the purposes of the interactive tools, and a short training session enabled people to use them. The importance of educating users is a particular challenge for geovisualization tools that are intended to be accessed over the Internet.

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Exploratory Analysis, Dynamic Statistical Visualization, and Geographic Information Systems

Cited by 82 publications

References 0 publications

Evaluation of Methods for Classifying Epidemiological Data on Choropleth Maps in Series

Evaluation of Methods for Classifying Epidemiological Data on Choropleth Maps in Series

Tools for visualizing properties of spatial and temporal periodicity in geographic data

Testing the Usability of Interactive Maps in CommonGIS

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