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What is Tacheometry?

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Asked: June 29, 20202020-06-29T18:14:40+05:30 2020-06-29T18:14:40+05:30In: Geotechnical Engineering
RaghavArora
RaghavArora

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What is a tachometry?

What is it’s used in civil engineering projects?

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  1. nikeetasharma

    nikeetasharma

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    nikeetasharma Guru
    2020-11-24T18:58:45+05:30Added an answer on November 24, 2020 at 6:58 pm

    Tacheometry is a system of rapid surveying, by which the horizontal and vertical positions of the points on the earths surface relative to one another are determined without using a chain or tape, or a seperate levelling instrument. It is a type of theodolite used for rapid measurements and determines, electronically or electro-optically, the distance to target.

    The principle of tacheometer is based on the property of isosceles triangles, where the ratio of distance of the base from apex and length of the base is always constant.

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  2. AdityaBhandakkar

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    AdityaBhandakkar User
    2020-08-17T08:33:18+05:30Added an answer on August 17, 2020 at 8:33 am

    Hi Raghav,

    Tacheometry is the branch of angular surveying in which the horizontal and the vertical distance of points are obtained by optical means as opposed to the ordinary slower process of measurement by tape or chain.

    Tacheometry is also called as telemetry or tachometry

    The instrument used: ordinary transit theodolite fitted with stadia diaphragm.

    Uses in civil engineering:

    1. It is used for the preparation of topographic maps.
    2. Surveying in the area where the direct method is inconvenient.
    3. Reconnaissance survey for railways, highways, expressways etc.
    4. Hydrographical survey.
    5. For establishing secondary control.
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  3. Soumyadeep Halder

    Soumyadeep Halder

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    Soumyadeep Halder User
    2020-06-30T18:46:39+05:30Added an answer on June 30, 2020 at 6:46 pm

    ans- defination

    Tacheometric is a branch of surveying in which horizontal and vertical distances are
    determined by taking angular observation with an instrument known as a tachometer.
    Tacheometric surveying is adopted in rough in rough and difficult terrain where direct levelling
    and chaining are either not possible or very tedious.
    Tacheometric survey also can be used for Railways, Roadways, and reservoirs etc.
    Tacheometric surveying is very rapid, and a reasonable contour map can be prepared for
    investigation works within a short time on the basis of such survey.
    An ordinary transits theodolite fitted with a stadia diaphragm is generally used for tacheometric
    surveying.

    Uses of Tachometry in civil engineering
    Tachometry is used for preparation of topographic map where both horizontal and vertical
    distances are required to be measured; survey work in difficult terrain where direct methods of
    measurements are inconvenient; reconnaissance survey for highways and railways etc.;
    Establishment of secondary control points.

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