softwareng

Category: 2. Levelling

  • What are Adjustment of the horizontal plate level

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    by

    Ibrahim
    in

    With this adjustment, the axis of the plate levels is perpendicular to the vertical axis of the theodolite. This is important because the vertical axis must remain truly vertical in order to accurately measure vertical and horizontal angles. To test this, the theodolite must be set on a firm ground. Clamp the lower plate and…

  • What are Permanent adjustments

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    Ibrahim
    in

    Permanent adjustments include: Adjusting the level of the horizontal plateHorizontal axis adjustment Binocular adjustmentBinocular level adjustment

  • What is Classification of levelling

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    Ibrahim
    in

    Leveling can be divided into two types: Simple levelingDifferential leveling

  • What is Elimination of parallax

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    by

    Ibrahim
    in

    The apparent change in the position of an object due to a change in the eye position of the observer is called parallax. In a telescope, parallax occurs when the image formed by the objective does not lie in the plane of the crosshairs. Unless parallax is removed, accurate bisection and objects become difficult to…

  • Level up

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    by

    Ibrahim
    in

    The vertical axis of the instrument is made truly vertical by a leveling-up operation which can be completed according to the following steps. a three-foot screw arrangement of a dumpy level and show a four-foot screw arrangement of a dumpy level. The telescope axis is placed parallel to the line joining one pair of screws…

  • Setting up level

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    by

    Ibrahim
    in

    This operation also involves fixing the instrument on a tripod and approximately leveling the instrument by adjusting the legs. The configuration can be completed according to the following steps. Step 1 The tripod is unfolded and set on the ground by placing it under the metal spiked legs so that it is straight and firm…

  • What Temporary adjustments are

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    by

    Ibrahim
    in

    The adjustments that are made for each setting of the leveling instrument are called temporary adjustments. These include the following: Setting the levelequalizeElimination of parallax

  • What is Adjustments of a level

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    Ibrahim
    in

    A level requires two types of adjustments, namely, Temporary adjustmentConstant adjustment

  • What are Levelling – Field work

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    Ibrahim
    in

    Survey work is mainly divided into two parts: (1) field work and (2) office work. In the field, necessary adjustments are made and the results are systematically recorded as described below.

  • Technical terms which are used in levelling

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    by

    Ibrahim
    in

    A horizontal plane: A horizontal plane through a point is a plane that is tangent to the surface of the surface at that point.Horizontal Line: A horizontal line is any line lying in a horizontal plane.Vertical Line: A vertical line at any point is a line normal to the surface through that point.Elevation: The elevation…