Which of the following may not cause local attraction on a magnetic needle?

The line normal to the plumb line is known as

The error in measured length due to incorrect holding of chain is

For a line AB

The method of plane tabling commonly used for establishing the instrument stations only, is a

Personal error in levelling occur due to

The correct position of holding staff is

In order to determine the natural features such as valley, rivers, lakes etc., the surveying prepared is

While measuring a chain line between two stations intervened by a raised ground