On it are marked positions of cities, indicated by circles; mountains, indicated by scales; and rivers, indicated by wavy lines.

RELIEF AND AERIAL MAPS

REFERENCES ON MAP PROJECTION

Hinks. A. R., Map Projections, Cambridge University Press, England. 1922

Wnrrrn H ManniiiK. A National Plan Study Brief." Landsca()« Architecture. July 1923. American A»iociation of Land»cape Architects. Cambridge. Mass.

Relief Map of the United States.

1. The purpose of this type of relief map is to aid the study of the geographical features of

the nation.

2. Relief maps emphasize rivers, lakes and harbors. They are therefore especially effective

for depicting facilities for water transportation.

GRAPHIC PRESENTATION

Z5

S "^

o

>. a.

o

-*-

0/

-♦-

« 4)

u _o

RELIEF AND AERIAL MAPS

Salei Managrmrnt. N. Y. C.

SCALE .4

A. A Relief Map Showing How the United States Would Look If Each State Were on a Level Proportionate to 1937 Federal Tax Collections.

1. The percentage of the total which each state contributes to the federal government is

indicated on each state.

2. Such things as population density, sales density, and wealth density can be presented

in this form.

Federal Power Commission, National Power Survey, "Cost of Distribution of Electrkily," l'J35 SCALE .5

B. Essential Parts of a Complete Electric Power System.

1. In this diagram of the essential parts of a complete electric power system, a hypothetical

land lay-out is used, since the important point is to include the information in the smallest possible space.

2. An attempt was made in this drawing to give the effect of a "bird's-eye view"