ERIC Number: ED242628
Record Type: RIE
Publication Date: 1984
Reference Count: 0
Choropleth Mapping: The Problems of Classification and Data Presentation.
Fairweather, Malcolm; Fairweather, Kathe G.
A teaching unit illustrates how the application of certain common classification systems, using the same data set, can produce different spatial configurations on choropleth maps. It is hoped that students, after completing the unit, will not only take greater care in deciding upon a classification system to use on their own choropleth maps, but also that they will become more critical in their analyses of all such maps. Students are presented with data and then shown several ways of classifying data into groups for making maps. The classification schemes used are: natural grouping--the boundaries of each data group are located where natural breaks occur; constant intervals--the numerical range of each class is the same; quantiles--equal size data groups; and quantitative--the use of standard deviation of the data array to set the class limits. Students must then produce five choropleth maps. After the maps have been completed, the students compare them and discuss the differences found in the spatial arrangements of the shading patterns. Diagrams containing data and sample maps are provided in the unit. (RM)
Publication Type: Guides - Classroom - Teacher
Education Level: N/A
Audience: Teachers; Practitioners
Authoring Institution: N/A
Identifiers: Choropleth Maps