THE COMPARISON OF SPEED, COST AND ACCURACY OF TRAVERSING USING EDM, ODM AND STEEL TAPE
THE COMPARISON OF SPEED, COST AND ACCURACY OF TRAVERSING USING EDM, ODM AND STEEL TAPE
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Date
1987-01
Authors
ONOH, MATTHEW NNONYELU
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Abstract
The Comparisonof Speed, cost and^accuracv of traversing
usinq EDM, ODM and Steel tape
A built-up area (Faculty of Enqineerinq) within the Ahmadi
Bello University. Samaru Campus was traversed emplovinq
theodolite with three methods of linear measurements. The
obiective was to comparatively and statistically analyse the
computed results of each of the three methods, in terms of
speed, cost and accuracy.
The anqular measurements were made with theodolite and
linear measurements were separately made with Steel tape,
EDM (Eldi-1) and ODM (Self-reducinq tacheometer ) .
The analyses of the results were done with regards to
parameter of time for speed, manpower involved, equipment
cost, overhead charqes etc were used for costing, and jr
accuracy; the relative accuracy was the parameter used. Also,
investiqations into dependency of time and method; cost and
method; and accuracy and method were carried out.
The results showed that EDM has the highest cost and best
accuracy, ODM has the shortest time and Steel tape is the
cheapest and slowest of the three methods.
Hence, for high accuracv work, (over 1/20000). measurements
of short or loner lines; EDM is recommended. For low
order works (< 1/5000) . ODM should be used and Steel tape
is recommended for accuracies greater than 1/5000, and on
gentle topography
Description
A project submitted to the Postgraduate School,
Ahmadu Bello University, Zaria in partial fulfillment
of the requirements for the award of the degree of
Master of Science in Land Surveying.
Department of Surveying
Faculty of Engineering
Ahmadu Bello University
Zaria.
Copyright© 1937 Matthew Nnonyelu Onoh. All rights
reserved.
June, 1987
Keywords
COMPARISON,, SPEED,, ACCURACY,, TRAVERSING,, USING EDM,,, ODM,, STEEL TAPE