A thematic map is a map that is used to show the relationship of a variable over a certain area. The five types of thematic maps are the choropleth map, graduated symbols, contour map, dot map, and dasymetric mapping. Choropleth maps show quantitative data using different colors. A gradated symbol map uses symbols to represent data. A contour map uses isolines. A dot map uses dots to show a spatial pattern. A dasytmetric map is similar to the choropleth but uses extra statistics. The example thematic map shows the results of the 2000 presidential election. The map would be classified as a type of dasymetric map because like a choropleth map, it uses colors. It also uses statistical data, or Electoral College votes.
http://kc-johnson.com/week-of-april-27/
No comments:
Post a Comment