Face left

‘Face left’ means that the vertical circle of the theodolite I son the left of the observer at the time o taking readings. The observation taken in the face left position is called faced left observation. Face right; this refers to the situation when the vertical circle of the instrument is on the right of the observer when the reading is taken. Technical Data used in the field explained in civil surveyor course in rawalpindi. The observation taken in the face right position is known as face right observation. Telescope normal; the face left position is known as ‘telescope normal’ or ‘telescope direct’. It is also referred to as ‘bubble up’.

Telescope inverted; the right position is called ‘telescope inverted’ or ‘telescope reserved’. It is also termed ‘bubble down’. Changing face; the operation of bringing the vertical circle from one side of the observer to the other is known as changing face. Some more details of civil surveyor course in rawalpindi are as under. Swinging the telescope; this indicates turning of the telescope in a horizontal plane.it is called ‘right swing’ when the telescope is turned clock wise and ‘left swing ‘when the telescope is turned anticlockwise.

Line of collimation; it is an imaginary line passing through the intersection of the cross hairs at the diaphragm and the optical center of the object glass and its continuation. Axis of the telescope; this axis is an imaginary line passing through the optical center of the object glass and the optical center of the eye-piece. Axis of the bubble tube; it is an imaginary line tangential to the longitudinal curve of the bubble tube at its middle point. Vertical axis; it is the axis of rotation of the telescope in the horizontal plane. TSK Training for Skills and Knowledge is the best institute in Rawalpindi Islamabad for Pakistani Students who wants to join civil surveyor course in islamabad.

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