PRELIMINARY SURVEY OPERATIONS
In this lesson, you will learn to identify the preliminary survey operations, reconnaissance, and signals
that support the surveyor.
TERMINAL LEARNING OBJECTIVE:
You will identify the preliminary survey operations, reconnaissance, and different
signals that support the surveyor.
You will be given the material contained in this lesson, a number 2 pencil, and a
You will correctly answer all practice questions at the end of this lesson.
The material contained in this lesson was derived from FM 3-34.331.
When surveying large areas, the exact curvature of the sea-level surface of the earth must be taken into
consideration. For this reason, many surveys conducted within the Army are called geodetic surveys.
The purpose of these surveys is to establish precise horizontal control.
Horizontal control has many important uses. It is used in scientific research for studies of the figure of
the earth, the earth's movement, and other geophysical research. It provides a rigid framework for all
kinds of accurate charting projects; serves in locating national, state, and country boundaries; and
perpetuates the surveys of private boundaries connected to it. Horizontal control enables surveys and
mapping of all kinds to be fitted together into a DOD charting and mapping plan, serves to increase the
accuracy of to provide checks for local and city surveys and surveys of lower order, and assists in the
perpetuation of monuments established by such surveys. Horizontal control is of overall importance to