Hydrographical surveying : a description of means and methods employed in constructing marine charts (1920)
Wharton, W. J. L. (William James Lloyd), 1843-1905, Field, Arthur Mostyn, 1855- · London : J. Murray · leaf 539
the steps are complete. When great accuracy is required, or should the measureddistances depart much from the horizontal, the distances mustbe referred to the horizontal plan; readings taken on the verticalarc of the theodolite will suffice for this, and it is thereforenecessary to select a time… … Fig. I. CHAP. XXL] SCHEME OF TRIANGULATION 511
Hydrographic surveying · Nautical charts
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