##### Curve & Setting Out Of Circular Curve

**Curve, **Horizontal curves are generally of three types, Simple Circular Curve, Compound Curve, Reverse Curve, Broken-back Curve, **Basic Definitions- **Back tangent, Forward tangent, Vertex or point of intersection, Deflection angle, Point of Curvature (P.C.), Point of tangency(P.T.), Tangent distance (T), External distance (E), Long chord (L), Mid ordinate (M), Length of curve (l), **Elements of Circular Curve-** Length of Tangent (T), Length of Curve (l), Mid Ordinate (M), Length of Chord (L), External Distance (E) Apex Distance, Chainage of Tangent points, **Intermediate Chord Length- **For 1st chord, For 2nd to (n-1) chord, For Last chord, No of Intermediate Chord

## Topics

## Compass Surveying (Fore Bearing And Back Bearing, Magnetic Declination, Angle of Dip)

Bearing measured from one station to adjacent next station in the direction of traverse is called fore bearing. Back Bearing, Magnetic Declination, Angle of Dip are discussed in detailed.

In special instrument, we detailed discuss about hand leveling, abney level, indian pattern clinometer, ceylon ghat tracer, sextant, site square, mining dial, brunton’s compass, pantagraph, eidograph.