Which of the following represents the CORRECT order of setting up a plane table?

By Mandeep Kumar|Updated : September 27th, 2022

(a) Centering, levelling, and orientation

(b) Centering, orientation, and levelling

(c) Levelling, centering, and orientation

(d) Levelling, orientation, and centering

Levelling, centering, and orientation are the CORRECT order of setting up a plane table. Before beginning any plotting work, the plane table must be set up at each station.

Correct Order of Setting up a Plane Table

It mostly entails repairing, levelling, and centering operations. Leveling is done first for plane table surveying, then levelling, and finally orientation. Theodolite, dumpy level, and other instruments must first be centred.

(a) Fixing: The tripod stand's top is levelled by eye assessment at a practical height, its legs are evenly spaced, and its shoes are securely planted in the ground.

(b) Leveling: The tripod's legs are moved in order to level the tabletop.

(c) Centering: The centering of the plane table involves two different sorts of operations.

Centering with reference to the already plotted position of the station: The table is moved and adjusted such that the tip of the plumb bob precisely points above the ground station while the pointed end of a U-fork is held at the station's projected position.

Centering with reference to the ground location of the station: The point corresponding to the tip of the pointed arm of the U-frame gives the transferred location on the table, and the tip of the plumb bob attached to a U-frame is put precisely over the ground point that needs to be moved (d) Orientation: Setting the position of the board at the survey station is the process of a plane table survey.

Summary:

Which of the following represents the CORRECT order of setting up a plane table? (a) Centering, levelling, and orientation (b) Centering, orientation, and levelling (c) Levelling, centering, and orientation (d) Levelling, orientation, and centering 

The right order to put up a plane table is levelling, centering, and orientation. Plane table is one of the easiest and fastest methods of surveying. It is used for exploration mapping, site mapping, coastal navigation mapping, etc.

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