choropleth map

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choropleth map

A map on which areas are colored or shaded according to variables, e.g., where a disease is active and where quiescent.
See also: map
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However, parallel coordinates linked to choropleth maps do not present only advantages.
Thus, tactile fill symbols for choropleth maps may need to be created with maximum differences among them and with nonlinear steps between the number of dots included to make up each fill pattern.
The choropleth maps of rates and Local Indicators of Spatial Autocorrelation by period show a similar pattern to that of total mortality for all causes, except that mortality rates continue to diminish throughout the study time period (see Figure 3).
The choropleth maps are probably easier to explain to the typical lay user--especially the ZIP code map, since many more people are more familiar with ZIP code administrative boundaries than they are with census tract boundaries.
For the map outputs, two cartographical methods were used--diagram map and choropleth map.
The only significant correlation with thematic representation was that choropleth maps were almost exclusively two-dimensional, whereas other thematic maps were more likely to use oblique perspectives.
The questionnaire asked participants to express their opinion about a choropleth map of the number of tractors for Chinese provinces.
An experiment was designed to investigate 1) the legibility of change in animated choropleth maps, 2) the influence of tweening on change detection and 3) the prevalence of change blindness blindness in a cartographic context.
1996) include choropleth maps showing mapped values significantly different from the national averages.
To facilitate the interpretation of these potentially complex color and trend variations, bicomponent trend maps employ a "bicomponent trend matrix," which extends a standard bivariate choropleth map legend by placing a time-series graph in each color cell of the legend to indicate how colors correspond to different trend types.
Known as local smoothing algorithms, one begins with a raster version of the choropleth map.
Although the alternative problem is the traditional type of areal interpolation problem, three additional scenarios require the use of areal interpolation methods--including the overlay of a choropleth map and an area class map, the overlay of two choropleth maps, and the missing data problem in which values are known for some zones at a given scale but not for other zones (Mrozinski and Cromley 1999).