This is Gales Traverse Table With all formulation Just need to Put the angles
Descripción: Pressure Traverse Gradient Curves
Pressure Traverse
DISCUSSION
The misclosure was 2’15” at 4 stations, so we have -34 per stations. We obtained the ratio 1 : 8468 . The ratio was accepted because it exceeded 4000.
We repeat the traverse survey 3 times because becau se we did not get the same bearings on the first and last readings. This is due to some errors that occur during the work field : 1. While taking reading, sometimes we accidentally moved the tripod by slightly pushing or pulling the total station that caused error readings because it is not perpendicular on the picket anymore. 2. Parallax error occurred while taking reading becau se most of our group members are wearing spectacles and it affects the readings taken. 3.
When rotating the total station from taking readings on the first point to the second point, we supposed to rotate the total station to the nearest angle within the area, but we rotated it clockwise all the time and causes error in bearing readings.
GEOMATICS ENGINEERING (BFC 20703)
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There are several precautions and cautions that should not be taken lightly : 1. Never transport the total station while attached to the tripod. Always remove the instrument and place it in the case when moving from one set-up point to the next. 2. Keep the instrument case closed when in the field to prevent dust and dirt. 3. Never remove a battery from an instrument while the instrument is on. 4. Always run batteries until they go dead. 5. At the end of the exercise, charge all dead batteries. The charging of batteries is your responsibility. Ask for instructions on how to charge the batteries.
GEOMATICS ENGINEERING (BFC 20703)
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RECOMMENDATION
1. There are a few suggestions to reduce error during this survey. The suggestion are: - All reading must be read by one person only for all survey point. - The person who are in charges with setting up equipment must know how to setting up very well. - The picket position must be correctly in same line with total station. 2. Other than that, there are a few suggestions to reduce error during calculate the survey data. There are: - All data observe must be calculated correctly with correct formula. - Double check is needed to ensure the data was correct and the traverse was closed. - All the angle and distance must be correctly calculated. - The correction of data must be not than 2’ 30’’ for second class traverse with total station less than 25 stations. 3. The tripod should be set on firm ground so that the value we get will not be effect b y environmental. 4. We should plan clearly the place where we use as station because it is important get a clear vision without from a station to another station. 5. The total station must be used carefully because the price is expensive. 6. The experiment should be done on a sunny day.
GEOMATICS ENGINEERING (BFC 20703)
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CONCLUSION
Close traverse is a survey that requires the establishment of a series of stations that is linked together by angles and distances. Hence, we used this method to measure the lengths and directions of a series of traverse lines which located in main campus, and each traverse station was marked with a wooden peg. The plan produced by surveying software and relative horizontal position can be use for establish boundaries, topographic mapping surveys, and construction layout surveys. The correction of data that we get is 2’ 15’’. So it is less than 2’ 30’’ and the precision we get 1:8468 .
