Theodolites
 Main Contructional
    Features
 Modern Theodolite
    Features
 Types Of Theodolites
 Reading Systems
 Electronic Theodolites
 Targets
 Setting Up

Theodolites

Examples Of Usage

Theodolites are be used for:

• General purpose angle measurement
• Provision of control surveys
• Contour and detal mapping
• Setting out and construction work

Factors Which Influence The Use Of Theodolites

• A clear line of sight between the instrument and the measured points is essential.
• The precision of the instrument is dependent on the raw repeatability of the angle measurement.
• A well defined measurement point or target/prism is required to obtain the maximum accuracy.
• The accuracy of angle measurement is subject to a number of instrumental errors and the correct field procedures.

Survey Methods Used For

Definition

A theodolite is a scientific instrument used for measuring angles (directions) in the horizontal and vertical planes. All theodolites have similar constructional features regardless of their age or level of technology, and all perform basically the same functions.