A bivariate choropleth map shows two separate variables, using different graphics or symbols, on one map. The above map shows the percentage of population under the age of 18 in shades of red; the blue shades represent the percentage of the rural population. The two variables are combined into one, single map.
http://www.geo.unizh.ch/~annal/Choropleth%20maps.html
No comments:
Post a Comment