Derive the expression to find the distance and elevation of the object when the base of the object is inaccessible? Consider instruments and objects lies in the same vertical plane.

Civil engineers can apply the wide variety of data from variety of sources in their field. They can practically apply the 'Spatial analysis' in field surveys, to solve location problems. Spacial analysis helps to apply modern technology in geographical surveys to manage, analyse, and visualise the dRead more

Civil engineers can apply the wide variety of data from variety of sources in their field. They can practically apply the ‘Spatial analysis’ in field surveys, to solve location problems. Spacial analysis helps to apply modern technology in geographical surveys to manage, analyse, and visualise the data in a effective way.

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## AdityaBhandakkar

When the base of the object is inaccessible we use an indirect method of surveying. A tachometer is used to measure the distance between the two points with the use of an analytical lens. There are two methods Stadia method: In this method diaphragm of the tachometer are provided with two stadia haiRead more

When the base of the object is inaccessible we use an indirect method of surveying.

A tachometer is used to measure the distance between the two points with the use of an analytical lens. There are two methods

D=(f/L)S + (f + d)

D=horizontal distance between tachometer and stadia rod.

f/L = multiplying constant

S= Staff Intercept

Elevation formula:v = KSsin(2Â©)/2 + Ccos(2Â©)

Â© = Theta= Angle of elevation or depression.

K & C = Tachometric Constant

substance method and tangential method is also used to find the elevation between two points.

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