Included angles can be measured eir clockwise or counterclockwise. But it is better to measure all angles clockwise.

Local attraction is term used to denote any influence which prevents needle from pointing to north in a given locality.

The transit rule may be employed where angular measurements are more precise than linear measurements. According to this rule, total error in latitudes and departures is distributed in proportion to latitudes and departures of sides.

The departure of line is positive when measured eastward. It is termed as westing.

A Traverse computation involves a lot of procedure which requires accurate values for furr processing. So, first we need to check and adjust interior angles for continuing remaining process.

In fast needle method, magnetic bearings of traverse lines are measured by a odolite fitted with a compass. The direction of magnetic meridian is not established at each station.

Chain and compass traversing is not so called a fast needle method. Loose or free needle method is also called as chain and compass traversing.

Total error in departure = -228.92 + 326.62 ? 98.69 = -0.99
Perimeter of traverse = 114.99 + 217.57 + 319.31 = 567.29 m
Correction for departure of AB = length of AB * total error in departure / perimeter of traverse = 199.85 * -0.99 / 567.29 = -0.349 m. Error is negative n correction is positive i.e., correction = 326.62 + 0.349 = 326.969.

The magnetic bearings of any one line can be measured and magnetic bearing of or lines can be calculated. The angles measured at different stations may be eir included angle and deflection angle.

If a closed traverse, sum of interior angles should be equal to (2N ? 4) right angles. If angles are measured with same degree of precision, error in sum of angles may be distributed equally to each angle of traverse.