Note 7 — Chapter XII · MAPPING AND CHARTING FROM THE AIR (Figs. 54 to 82)
Reading edition
What can be done, however, by photographing obliquely from a high altitude, thereby increasing the area in the field of vision, is illustrated by Figure 54, which encompasses Lake Erie from one shore to the other and, in its representation of the main features of the region, is akin to maps on a relatively small scale, such as 1:1,000,000.