Plumb line-A line (as a cord) that has at one end a weight (as a plumb bob) and is used to
determine verticality.
Reticle-A scale on transparent material (as in a telescope) used especially for measuring or
aiming.
Station-The location of a definite point on the earth's surface that has been determined by
surveying methods. It may be a point on a traverse over which an instrument is set up or a
length of 100 feet measured on a given line-broken, straight, or curved.
Traverse-A sequence of lengths and directions of lines between points on the earth, obtained
by or from field measurements and used in determining the positions of the points. A traverse
may determine the relative positions of the points that it connects in a series.
Vertical angle-An angle between two intersecting lines in a vertical plane. It should be
understood that one line lies on the horizontal plane, and the angle originates from the
intersection of the two planes.
Vertical line-A line that lies in the vertical plane and is perpendicular to the plane of the
horizon, such as the direction of a plumb line.
Vertical plane-A plane that is perpendicular to the horizontal plane.
PART D - FIELDWORK
1-7. Fieldwork Concept. Fieldwork is important in all types of surveys. To be a skilled surveyor, you
must spend a certain amount of time in the field to acquire needed experience. The study of this ACCP
will enable you to understand the underlying theory of surveying, the instruments and their uses, and the
surveying methods. However, a high degree of proficiency in actual surveying, as in other professions,
depends largely on the duration, extent, and variety of your actual experience.
a. Project Analysis. The project must be analyzed thoroughly before going into the field. You
must know exactly what is to be done, how you will do it, why you prefer a certain approach over other
possible solutions, and what instruments and materials you will need to accomplish the project.
b. Speed. You must develop speed in all your fieldwork. This means that you will need
practice in handling the instruments, taking observations, keeping field notes, and planning systematic
moves. Surveying speed is not the result of hurrying; it is the result of the following:
The surveyor's skill in handling the instruments.
The intelligent planning and preparation of the work.
EN0591
1-8
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