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Beginners Guide to Edi Surveys Ltd

If essential, clear any high greenery from the path of the traverse, so that you will have the ability to see each marked point from the one before it. Clear the course and mark details 13. Start traversing at the very first point A. Get rid of the varying pole and stand at point A.

Point A becomes station 1. The instructions you determine from there to point B, or station 2, is called an insight * (FS) because you are measuring forward. Note down this value in a table (see step 17). FS=AB 14. Replace the varying pole at station 1 (point A) and transfer to station 2, while measuring the horizontal distance AB by pacing or chaining.

Look back at station 1 and measure the azimuth of line Bachelor's Degree, which is called a backsight (BS). Look forward at the next point C, or station 3, and measure the azimuth of line BC, a foresight (FS).

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Note these worths down in the table (see action 17). BS = Bachelor's Degree Note: the difference between the foresight and backsight ought to be 180. A difference of just 1 or 2 degrees in between the FS and BS is appropriate and may be remedied later on (see step 19). If the error is higher, you need to make the measurement once again before proceeding to the next station.

Repeat this treatment, measuring horizontal ranges from station to station and measuring 2 azimuths (a BS and a FS) for each point. From the last station at the end of an open traverse, you will just have a BS measurement, just as you had just an FS from station 1.

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6 and 4. 0). Range BC 17. You ought to thoroughly take down all the measurements you have made in a field book. You can utilize a table like the one displayed in the example or you can make a draft of the open traverse on square-ruled millimetric paper, taking down your measurements next to the correct stations in it.

(see Area 3. Using the known station A, compare the position of the last station X with its recognized position X'. If this contrast shows a big mistake (the closing mistake XX'), you will require to change the observed traverse AX.

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Find azimuth AB- a foresight- from the centre of this station with the compass. Land Survey. Change the varying pole exactly at station 1; 22. In a field book, thoroughly keep in mind down all your measurements. You can utilize a table similar to the one recommended for the open traverse (see step 17).

At the exact same time, check to see that the foresights and backsights vary by 180 (Land Survey). Example You have actually surveyed site ABCDEA with a closed traverse and your field notes are as follows: Stations Range (m) Azimuths (degrees) Computed distinction FS/BS (degrees) From To FS BS 1 2 90. 8 136 315 179 2 3 53.

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Beginning with station 1 (A), draw the observations of your compass traverse on square-ruled paper. Use a protractor to measure the azimuths (see Area 3. 3), and a sufficient scale for the measured distances (see Section 9. 1). If there is a closing error, adjust your illustration by utilizing the graphic technique described for an open traverse (see action 19, above).



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