-11-
Therefore point B is 0.511m higher than point A.
(The value of h will be negative if point B is
lower than point A.)
<When the distance between points A and B is
large or if the height difference is great>
1) Divide the distance into a number of sections
and determine the height difference of each
section.
Fig.5.2
2) The height difference between points A and B is
the total of the height differences of all the sec-
tions.
The general formula is:
Altitude of the required point = altitude of known
point + total of backsight values - total of foresight
values.
※
This simple leveling technique has no error
check. It is better to measure from A to B and
back to A so that the error of closure can be cal-
culated.
Summary of Contents for C300
Page 1: ...SURVEYING INSTRUMENTS C300 C310 C320 C330 自動レベル Automatic Level 取扱説明書 OPERATOR S MANUAL ...
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Page 56: ...第 4 版 05 0806 4th ed 05 0806 Printed in China 2004 SOKKIA TOPCON CO LTD ...