Trigonometric Levelling & Tacheometry

Trigonometric Levelling

Trigonometric Levelling, Determination of elevation of object when its base is accessible, Determination of elevation of object when its base is not accessible, Determination of elevation of the object when the two instruments are not in the same vertical plane.

Tacheometry

Tacheometry, Instrument Used In Tacheometry – Tacheometer, Stadia Rod. Different Systems of Tacheometric Measurement- Stadia System (Fixed hair system, Movable hair system), Tangential System, Subtense Bar System, Theory of Tacheometer, Distance and Elevation Through Tacheometer- When a Staff Is Vertical, & When a Staff Is Perpendicular to Line of Sight.

Topics

Surveying

Photogrammetry (Types of Photogrammetry, Types of Photographs, Scale of Photograph, Relief Displacement, ETC)

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1 November 2021

In this photogrammetry chapter, we detailed discuss about photogrammetry, aerial photogrammetry, vertical photograph, scale of photograph, datum scale of photograph, average scale of photograph, flying height, ground co-ordinates & length of a line from a vertical photograph, crab, drift, relief displacement, number of photograph required to cover an area, exposure interval, air base, etc.

Surveying

Compass Surveying (Compass, Surveyor Compass, Prismatic Compass)

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30 August 2021

Compass is a survey instrument used for the measurement of horizontal angles and the bearing of a line of sight.Surveyor Compass and Prismatic Compass are discussed in detailed.