Excerpt from Maps and Map-Making: Three Lectures Delivered Under the Auspices of the Royal Geographical Society Prismatic compass traverse, 96 - Plane-tabling, 99 - Photographic surveying, 101 - Determination of heights, 102. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.