choroplethic map

choroplethic map

a method of mapping to display quantitative information such as death rates in defined jurisdictions (states, counties, etc.) by color coding or shading.
[G. chōros, district, + plēthos, multitude, + -ic]

cho·ro·pleth·ic map

(kōr'ō-pleth'ik map)
A method of mapping to display quantitative information such as death rates in defined jurisdictions (states, counties) by color coding or shading.
[G. chōros, district, + plēthos, multitude, + -ic]
References in periodicals archive ?
Although some internal variation will remain, it will be less than in a choroplethic map.
In particular, all census tracts in Douglas, Paulding, Forsyth, Rockdale, Coweta, Fayette, Henry, and (with one minor exception) Cherokee counties have the lowest class of population density in the choroplethic map, suggesting broad homogeneity of census tract population density throughout the outer suburban fringe.
This is easily accomplished in a GIS, which can also display the results in the form of choroplethic maps.
A second limitation of choroplethic maps is that they give the impression of abrupt changes at the boundaries of administrative areas (such as counties or census tracts), while representing population as a continuous variable across the entire land area.
However, with dasymetric mapping, these transitions are a better reflection of the true underlying geography of the area than the transitions in choroplethic maps, which are artifacts partially attributable to the arbitrary delineation of areal boundaries (Langford 2003).
Class Intervals to Enhance the Visual Correlation of Choroplethic Maps.
Modifying objective functions and constraints for maximizing visual correspondence of choroplethic maps.
Perceptions of the variable similarity of bivariate choroplethic maps.