Could you tell me if you are recording the angle when you retake the measurements? When you rotate and flip the total station... That's what I'm unsure about.
If you watch my other video, it shows you which angles to record and how to book them correctly and also the calculations necessary at the very end. th-cam.com/video/QnbU5jT6PKY/w-d-xo.htmlsi=VIJuwhayVSTyzzym
@@applied-maths Thanks! So if we are measuring the internal angles of a triangle, I would set my initial angle as 0 from vertex A to B, then turn to the next vertex C, and record the angle, then change face and record the angle at vertex C again? Im confused about turning it 180 degrees to change face, how is doing that giving an accurate angle? Is it using the line AB as the reference still? Does it matter if i rotate it left or right when turning it 180 degrees? And when turning it to another point, does it matter if i turn it around left or right? Wouldn’t turning it one way measure the internal angle, and the other way measure the external angle?
The face left and face right measurements are to do with the accuracy / errors of the instrument. This explains it - The “Left” “Right” readings will tend to cancel out errors in the alignment of the telescope with the verniers or in more modern instruments the encoder disks. What this means is after a proper shop adjustment, the centerline of the telescope and the “Zero” mark on the verniers/encoders will be in as near perfect alignment as practical. There are ALWAYS systematic errors we must deal with. In this case, if you sight a line turning an angle and read 23 degrees 42 minutes 30 seconds with only one face. You will never know if your instrument is properly aligned - if you are very careful and do both faces you might see 23 degrees 42 minutes 30 seconds on the right face and 23 minutes 41 minutes 50 seconds on the left face. This 40-second difference would show that the centerline of the telescope is about 20 seconds out of alignment with the verniers or encoders. But the average of the two faces should give a fairly true reading. I measure angles in the clockwise direction. It does not matter to turn your instrument clockwise or anti-clockwise when taking the next set of measurements.
No it shouldn’t. Just make sure that you zero your instrument looking at your first station and then turn to look at the next station and record your angle. Just beware then I used an older theodolite, it could measure an angle as an acute angle in both the clockwise and anti-clockwise directions or rotation - there was a specific mode - this may or may not apply to your equipment.
very good practical session
Thank you - I hope to add several videos detailing the next stages with these measurements- angle calculation, WCB’s and coordinate calculations.
Could you tell me if you are recording the angle when you retake the measurements? When you rotate and flip the total station... That's what I'm unsure about.
If you watch my other video, it shows you which angles to record and how to book them correctly and also the calculations necessary at the very end.
th-cam.com/video/QnbU5jT6PKY/w-d-xo.htmlsi=VIJuwhayVSTyzzym
@@applied-maths Thanks! So if we are measuring the internal angles of a triangle, I would set my initial angle as 0 from vertex A to B, then turn to the next vertex C, and record the angle, then change face and record the angle at vertex C again? Im confused about turning it 180 degrees to change face, how is doing that giving an accurate angle? Is it using the line AB as the reference still? Does it matter if i rotate it left or right when turning it 180 degrees? And when turning it to another point, does it matter if i turn it around left or right? Wouldn’t turning it one way measure the internal angle, and the other way measure the external angle?
The face left and face right measurements are to do with the accuracy / errors of the instrument. This explains it - The “Left” “Right” readings will tend to cancel out errors in the alignment of the telescope with the verniers or in more modern instruments the encoder disks. What this means is after a proper shop adjustment, the centerline of the telescope and the “Zero” mark on the verniers/encoders will be in as near perfect alignment as practical. There are ALWAYS systematic errors we must deal with. In this case, if you sight a line turning an angle and read 23 degrees 42 minutes 30 seconds with only one face. You will never know if your instrument is properly aligned - if you are very careful and do both faces you might see 23 degrees 42 minutes 30 seconds on the right face and 23 minutes 41 minutes 50 seconds on the left face. This 40-second difference would show that the centerline of the telescope is about 20 seconds out of alignment with the verniers or encoders. But the average of the two faces should give a fairly true reading.
I measure angles in the clockwise direction.
It does not matter to turn your instrument clockwise or anti-clockwise when taking the next set of measurements.
@@digitalsurveyor thank you! So turning the UTS around the long way to the next point won’t actually record external angle?
No it shouldn’t. Just make sure that you zero your instrument looking at your first station and then turn to look at the next station and record your angle. Just beware then I used an older theodolite, it could measure an angle as an acute angle in both the clockwise and anti-clockwise directions or rotation - there was a specific mode - this may or may not apply to your equipment.