Dark Circle(12) during your measuring operation,consider 360°=0°.The calculation will be 360°-second value in
degree +first value in degree.
Example:
If the first value in degree is 4 and the second is 354,the angle will be 10.（360-354+4=10）.
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HOW TO MEASURE THE DISTANCE ON THE GROUND
In accordance to the principle mentioned under point 10 11 and 12 ,it is possible to define the distance on the ground
between two well-visible points on the ground.
For example ,you can measure the width of a farm house ,the length of a bridge,etc.
There is one necessary condition to measure the distance from your own position to that of the object:the line
running from these two positions must be as perpendicular as possible to the side of the object to be measure
Example:
At a distance of 4000m, a bridge spans a river, transverse
to the line of vision.How long is the bridge if an angle of
6°is measured from the right to the left river bank?
6°=10% or 1 /10
4000x10%=400m OR 4000X1 /10=400m
14
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MEASURE OF THE DISTANCE OF AN OBJECT,THE HEIGHT AND/OR WIDTH OF WHICHARE KNOWN
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