Colour Detection on Bivariate Choropleth Maps: The Visual Search Process

Illuminated Choropleth Maps

Choropleth maps are commonly used to show statistical variation among map enumeration units. Map makers take into account numerous considerations and make many decisions to produce a product that will effectively communicate spatially complex information to the map user. One design consideration is the choice between classed or unclassed choropleth maps. Unclassed maps assign a unique color, sh...

Choropleth Maps: Classification Revisited

Classification was traditionally used as an instrument for producing choropleth maps. In our study we consider the role of the process of classification in exploratory data analysis. We developed a set of tools for classification that facilitate looking on data from various viewpoints and thereby investigate different aspects of the data. The tools include direct manipulation controls for speci...

Dynamic Queries and Brushing on Choropleth Maps

Users who must combine dcmographic, economic or other data in a geographic context are ofren hampered by the integration of tabular and n w p representations. Static, paper-based solutions limit the amount of data that can be placed on a single map or table. By providing an effective user interface, we believe that researchers, journalists, teachers, and students can explore complex data sets m...

Issues of Change Detection in Animated Choropleth Maps

One primary utility of animated maps is their ability to depict change over time and space; unfortunately, recent research suggests that humans frequently fail to perceive changes within dynamic graphics. However, different types of dynamic graphics include different manifestations of change. For example, an animated proportional-symbol map possesses different change properties than an animated...

Conditioned Choropleth Maps And Hypothesis Generation