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would be made in the same manner as wagon wheels and often by the same makers. The measuring devices would be made by makers of scientific instruments and the device and handles would be attached to the wheel by them. The device to read the distance travelled would be mounted either near the hub of the wheel or at the top of the handle.
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of exactly 1 metre (or other known unit of measure), hence one revolution of the wheel equates to 1 unit of distance traveled on the ground if there is no slip. Every time the wheel makes a rotation, the wheel produces an audible click which is then counted and therefore the number of clicks that are
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Surveyor's wheels will provide a measure of good accuracy on a smooth surface, such as pavement. On rough terrain, wheel slippage and bouncing can reduce the accuracy. Soft sandy or muddy soil can also affect the rolling of the wheel. As well, obstacles in the way of the path may have to be accounted
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In the 17th century, the surveyor's wheel was re-introduced and used to measure distances. A single wheel is attached to a handle and the device can be pushed or pulled along by a person walking. Early devices were made of wood and may have had an iron rim to provide strength. The wheels themselves
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The surveyor's wheel measures the distance along a surface, whereas in normal land surveying, distances between points are usually measured horizontally with vertical measurements indicated in differences in elevation. Thus conventionally surveyed distances will be less than those measured by a
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for separately. Good surveyors will keep track of any circumstance on the path that can influence the accuracy of the distance measured and either measure that portion with an alternative, such as a surveyor's tape or measuring tape, or make a reasonable estimate of the correction to apply.
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on the axle of the two wheels that meshed with a toothed wheel to drive another transverse screw that carried a slider. A pencil on the slider recorded the distance travelled along the screw on an attached drawing board at a chosen scale.
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Surveyor's wheels are used primarily for lower accuracy surveys. They are often used by road maintenance or underground utility workers and by farmers for fast measures over distances too inconvenient to measure with a surveyor's tape.
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counted by the user is approximately the number of distance units traveled. Due to the design of the trundle wheel, it has the potential to not always travel in a straight line which may add extra distance to the final reading.
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The surveyor's wheel is marked in fractional increments of revolution from a reference position. Thus its current position can be represented as a fraction of a revolution from this reference. If the wheel rotated a full
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is a simplified form of a surveyor's wheel. It is commonly used by people who need an easy way to find the rough distance from one place to another. The trundle wheel is composed of a
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Information on the use of perambulators in surveying in
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extended the concept in 1827 to create a device that recorded the distances travelled in
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Each revolution of the wheel measures a specific distance, such as a
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In some cases, double-wheel hodometers were constructed.
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on the wheel. Some can fold for transport or storage.
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Modern surveyor's wheels are constructed primarily of
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Sir
Francis Ronalds: Father of the Electric Telegraph
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A diagram of a surveyor's wheel taking a measurement.
101:. Unsourced material may be challenged and removed.
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708:Length, distance, or range measuring devices
367:form as a survey plan. The apparatus had a
205:introducing citations to additional sources
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64:Learn how and when to remove these messages
426:radians, which is equal to 135 degrees or
637:Nineteenth Century Scientific Instruments
550:Learn how and when to remove this message
274:Learn how and when to remove this message
161:Learn how and when to remove this message
683:Example of 16th century German hodometer
195:Relevant discussion may be found on the
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573:It works by having a wheel which has a
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489:Britannia
390:Principle
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