The theory and practice of surveying. Designed for the use of surveyors and engineers generally, but especially for the use of students in engineering (1886)
Johnson, J. B. (John Butler), 1850-1902 · New York, J. Wiley & sons · leaf 457
Fig. 116. tern 11. of a double row of simple triangles or of simple tri-angles arranged as hexagons, and system III. of a single rowof quadrilaterals. A quadrilateral in triangulation is an arrange-ment of four stations with all the connecting lines observed.This gives six lines connecting as many…
Surveying
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