Since a key to the shadings is given in this map, it is much easier to read than 231. 1910

LEGEND

INHABITANTS PER SOUARC MILE

I I ^^ 2-5 JH 6 - 17 Q IS - 44 ((45-89

90 AND MORE

WPA, Division of Social Rrsrarrh, "The People of the DrouEht States." March 1037.

Density of Population in the Drought Area in the United States for the Years 1870, 1890. 1910, and 1930.

While the lines for 1870 and 1890 seem to follow natural contours, the lines for 1910 and 1930 are definitely county lines.

Chapter 29 DISTORTED MAPS

IN A distorted map, geographic location of data is maintained bymaking the area of states, countries, etc., proportional to the quantitative data.

Distorted maps are sorhetimes called proportional maps.

GENERAL REFERENCES

Raisz, Erwin, General Cartography, McGraw-Hill Book Co., Inc., New York City, 1938

Litpr.iry Diurst. A|)ril 23, 1021.

Relative Size of Each of the United States If Based on Electrical Energy Sold for Light and Power in 1921,

The theory beliind the construction of a distorted map is to represent the area of each state as proportional in size to some value other than land area. Thus the geo- Kraphical position of tlie state is maintained, and the new area values can be compared.

DISTORTED MAPS

2A^)

SWEDEN NORWAY

Electrical Worki. January 6, 1Q23.

SCALE .7

A. Comparative Size of Leading Nations If Area Is Based on Total Amount of Electrical Energy Consumed.

The form of this comparison map eliminates the greatest fault of the distorted map: that is, changing the shape of the country, or state.