SURVEYING IS THE WORD MAINLY USED FOR LAND SURVEYING , BY WHICH AN AREA MAY BE DEATAILED.

MAIN PRINCIPLE............

1. Distance Measurement between two points.(LENGTH)

2.Clockwise Angle Measurement of a line joining two points from Magnetic Meridian.(BEARING)

From Magnetic Meridian Clockwise Angle Measurement of a line AB in a direction from point A to B is called Fore Bearing and angle measured in a direction from point B to A is called Back Bearing.

Back Bearing = Fore Bearing + 180 , if F.B. < 180

Back Bearing = Fore Bearing - 180 , if F.B. > 180

Reduced Bearing Shows in NE, SE, SW, NW Directions. The Formula is.......

If Bearing < 90 , Reduced Bearing is NE = BEARING,

If Bearing > 90 < 180 , Reduced Bearing is SE = 180 - BEARING,

If Bearing >180 <270 , Reduced Bearing is SW = BEARING - 180 ,

If Bearing >270 < 360 , Reduced Bearing is NW = 360 - BEARING,.

Above are the some brief introductory principles of Land Surveying.

Praveen