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  2. Stadia mark - Wikipedia

    en.wikipedia.org/wiki/Stadia_mark

    If one observes a vertical length on a stadia rod, rule or levelling rod with the telescope and sees that the rod spans 0.500 m between the marks (the stadia interval), then the horizontal distance from the instrument to the rod is: 0.500m x 100 = 50 m. In the adjacent image, the upper stadia mark is at 1.500 m and the lower at 1.345 m.

  3. Stadiametric rangefinding - Wikipedia

    en.wikipedia.org/wiki/Stadiametric_rangefinding

    The interval between stadia marks in most surveying instruments is 10 mrad and gives a stadia interval factor of 100. The distance between the instrument and a stadia rod can be determined simply by multiplying the measurement between the stadia hairs (known as the stadia interval) by 100. The instrument must be level for this method to work ...

  4. Level staff - Wikipedia

    en.wikipedia.org/wiki/Level_staff

    Surveyor's view of the levelling rod with the crosshair. This indicates a reading of 1.422 m, interpolated between the 1.420 m and 1.430 m marks. Rods come in two classes: Self-reading rods (sometimes called speaking rods). Target rods. Self-reading rods are rods that are read by the person viewing the rod through the telescope of the instrument.

  5. Levelling - Wikipedia

    en.wikipedia.org/wiki/Levelling

    The top mark is at 1,500 mm and the lower is at 1,345 mm; the distance between those two marks is 155 mm, yielding a distance to the rod of 15.5 m. Optical levelling , also known as spirit levelling and differential levelling , employs an optical level , which consists of a precision telescope with crosshairs and stadia marks .

  6. Rod (unit) - Wikipedia

    en.wikipedia.org/wiki/Rod_(unit)

    The rod, perch, or pole (sometimes also lug) is a surveyor's tool [1] and unit of length of various historical definitions. In British imperial and US customary units, it is defined as 16 + 1 ⁄ 2 feet, equal to exactly 1 ⁄ 320 of a mile, or 5 + 1 ⁄ 2 yards (a quarter of a surveyor's chain), and is exactly 5.0292 meters.

  7. Huntington Bank Field - Wikipedia

    en.wikipedia.org/wiki/Huntington_Bank_Field

    Huntington Bank Field is a stadium in Cleveland, Ohio, United States, primarily for American football.It is the home field of the Cleveland Browns of the National Football League (NFL), and serves as a venue for other events such as college and high school football, soccer, hockey, and concerts.