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Level and Levelling
Elevation measurements Elevation measurements involve measurements in vertical plane. It is also known as levelling.…
Posted inSurveying
ADVANTAGES AND LIMITATIONS OF PLANE TABLE SURVEY
Advantages are 1. Possibility of omitting measurement is eliminated. 2. The surveyor can compare the…
Posted inSurveying
ERRORS IN PLANE TABLE SURVEYING
The errors may be grouped into the instrumental and personal errors. Instrumental Errors 1. The…
Posted inSurveying
METHODS OF PLANE TABLING
The following four methods are available for carrying out plane table survey: 1. Radiation 2.…
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PLANE TABLE AND ITS ACCESSORIES
The most commonly used plane table It consists of a well-seasoned wooden table Top mounted on a…
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LOCAL ATTRACTION
A freely suspended and properly balanced magnetic needle is expected to show magnetic meridian.However, local objects…
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DECLINATION AND DIP
The magnetic meridian and the true meridian may not coincide with each other in a…
Posted inMechanics of Solids
BEARING
As stated earlier a bearing of a line is the angle made by the line…
Posted inSurveying
METHOD OF USING A COMPASS
To take a reading from a compass, the following temporary adjustments are required: (i) Centring: The…
Posted inSurveying
TYPES OF COMPASS
The types of compass that are used commonly are: (i) prismatic compass; and (ii) surveyor…