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Rotation of the upper plate about the alidade axis is known as traversing the instrument. The horizontal plates can be levelled by means of three foot screws located beneath the lower plate, in a similar way to a level. Simplified Diagram Of An Early Vernier Theodolite. Showing Most Of The Main Components. Telescope.
Uses of Theodolite. Use of theodolite;. ? Mapping applications and in the construction industry ? Measurement of Horizontal and vertical angle. ? Measurement of magnetic bearing of lines. ? Locating points on line. ? Prolonging survey lines. ? Determining difference in elevation. ? Setting out curves. ? Aligning
notes theodolite.pdf - Download as PDF File (.pdf), Text File (.txt) or read online. theodolite.
ment~—the same plane which bisects the photo- graphic lens and passes through the axis of revolution of the internal magnetic compass and the vertical hair in the camera. Vertical limb divided to half degrees, moving with the telescope with ?tted vernier to read to minutes. Revolving tubular level let into a socket in the roof
THEODOLITE: INTRODUCTION. INTRODUCTION. Theodolite is used to measure the horizontal and vertical angles. Theodolite is more precise than magnetic compass. Magnetic compass measures the angle up to as accuracy of 30'. However a vernier theodolite measures the angles up to and accuracy of 10'', 20".
Description of the Theodolite. This instrument (as represented in the next page) consists of two circular plates, A and B, called the horizontal limb, the upper, or vernier plate, A, turning freely upon the lower, and both have a horizontal motion by means of the vertical axis, C: this axis consists of two parts, external and internal,
THEODOLITE SURVEYING. THEODOLITE SURVEYING. 1. Panchal kaushik b. -130460106039. Chaudhary het j. -130460106009. Patel harshkumar s. -130460106051. THEODOLITE SURVEYING. So far we have been measuring horizontal angles by using a Compass with respect to meridian, which is less accurate and
Welcome to this another lecture on basic surveying. Today we are going to start a new module. This is module number 5, and we will be talking about theodolites and total stations in this module. These are the instruments, very important instruments, and we cannot think of doing surveying without these instruments. So, this
Until recently, transits and theodolites were the most commonly used surveying instruments for angle measurements for angle measurement. These two devices were fundamentally equivalent and could accomplish basically the same task. ? Today, total station accomplish all the task much more efficiently than transits and
Level Rods. 2.4.7. 2-05 Angle and Distance Measuring Instruments. A. General. 2.5.1. B. Theodolites. 2.5.2. C. Electronic Distance Measuring. Instruments (EDMI). 2.5.3. D. Total Station Instruments. 2.5.12. 2-06 Tapes. A. General. 2.6.1. B. Steel Tapes. 2.6.1. C. Non-Metallic Tapes. 2.6.1. 2-07 Hand-Held Survey Equipment.
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