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Tuesday, 9 August 2016

LESSON NOTE ON CHECK ON CLOSED TRAVERSE

CHECK ON CLOSED TRAVERSE 1. Check on angular measurements (a) The sum of the measured interior angles should be equal to (2N – 4) x 90 ...

LESSON NOTE ON CHECK ON OPEN TRAVERSE

CHECK ON OPEN TRAVERSE In open traverse, the measurements cannot be checked directly. But some field measurements can be taken to check t...

LESSON NOTE ON MEHODS OF TRAVERSING

MEHODS OF TRAVERSING Traverse survey may be conducted by the following methods : 1. Chain traversing (by chain angle) 2. Co...

LESSON NOTE ON CROSS-STAFF AND OPTICAL SQUARE

CROSS-STAFF AND OPTICAL SQUARE A. Cross-staff The cross-staff is a simple instrument for setting out right angles. There are three type...

LESSON NOTE ON PROCEDURE OF PLOTTING

PROCEDURE OF PLOTTING 1. A suitable scale is chosen so that the area can be accommodated in the space available on the map. 2. A margin...

Lesson Note On The importance of geodetic control in the construction process

The importance of geodetic control in the construction process The purpose of construction guidance observations Geodetic observations ar...

LESSON NOTE ON SPHERICAL TRIANGLE

SPHERICAL TRIANGLE The theodolite measures horizontal angles in the horizontal plane, but when the area becomes large, such as in the cas...

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