The objective of this lesson is to learn different different data visualization techniques using country-level geo-demographic data.
Using the variable values shown in the data table at the bottom of the map, complete the color mapping table so that each color corresponds to a range of values
Paint each country by matching its variable value with a color in the color mapping table. Recommended practice is to use "cool" colors such as blue for low variable values. "Hot" colors such as orange and red should be used for high values.
This entry states the total route length of the railway network and of its component parts by gauge: broad, standard, narrow, and dual. Other gauges are listed under note.
Source: CIA World Factbook Unless otherwise noted, information in this page is accurate as of January 1, 2008