24 important 1 liners from Surveying - Civil Engineering

1 liners from Surveying subject taken from the field Civil Engineering

Common 1 liners from Surveying

R.L. (Reduced Level)

• Any point's R.L. reflects its elevation (above or below 0 with respect to mean sea level as a datum).

Axis of the telescope

• The line that runs from the objective's optical core to the eyepiece's center.

Axis of the level tube

• At its mid-point, an imaginary line tangential to the tube's longitudinal curve.

Backsight

• Backsight is a reading taken by a staff member on a known elevation point.

Benchmark

• A benchmark is a known elevation above the datum that is fixed.

Datum

• A datum is a level surface (real or imagined) that is used as a reference.

Elevation

• The vertical distance above or below a datum is the elevation of a point/station on or near the earth's surface.

Height of instrument

• The height of the instrument, also known as HI the instrument's height, is the elevation of the telescope's line of sight.

Horizontal plane

• A plane can still be perpendicular to a plumb axis. It is perpendicular to a flat board.

Horizontal Line

• A horizontal line is one that is often perpendicular to a plumb line. It is perpendicular to a level axis. It can be found in the horizontal plane.

Horizontal distance

• Horizontal distance is the distance measured to a level line in plane surveying.

Intermediate sight

• The staff reading on a point other than the backsight and foresight of whose height is to be calculated is known as Intermediate Sight or IS.

Level surface

• An equipotential surface of the earth's gravitational field is a level surface. It's a curved surface with all of the elements perpendicular to the plumb axis. The simplest example of a level surface is a body of still water.

Level line

• At all points, the level line is a curved line that is parallel to plumb lines. Thus, it sits on a flat board.

Line of collimation

• The line that runs from the junction of the crosshairs to the objective's optical core and continues. Line of sight is another name for it.

Line of sight

• The junction of the crosshairs and the optical base of the objective lens is the line of sight.

Mean Sea level

• Mean sea level (MSL) is calculated by averaging the height of the sea's surface at all levels of the tides over an 18.6-year cycle. As a vertical datum level board, it is used. The MSL of Mumbai port is used as a reference surface for determining vertical height in India.

Plumb line

• It's the orientation of the earth's gravitational field's force lines. It is described in plane surveying by the position of a freely suspended plumb-bob.

Relative elevation

• The vertical distance between the level lines passing through two points is the difference in elevation between them.

Turning Point

• The turning point is a transitional/interval point between the setup of stations with both foresight and backsight readings.

Vertical plane

• It's a plane that runs parallel to a plumb axis. It's perpendicular to a horizontal plane.

Vertical line

• It's a line that runs parallel to a plumb line. It's perpendicular to a horizontal axis. It can be found in the vertical plane.

Vertical distance

• The distance measured along a plumb line is known as vertical distance.

Vertical Angle

• In a vertical plane, a vertical angle is an angle formed by two intersecting straight lines.

These are the 24 common important 1 liners from surveying, I hope you like reading this article.

Thanks,

Kumar Bhanushali