MatthewMansfield
Civil/Environmental
- Aug 11, 2012
- 47
Hello all
I have trying to learn how to survey. I am not an engineer or work in surveying however I have access to a Trimble S8 Total station and i am trying to learn how to use it off my own back.
I was wondering if anyone out there in the community could explain how Face 1 and Face 2 angles are observed using a total station or theodolite for that matter.
Below/attached is a diagram of how I think face 1 and face 2 observations are recorded.
The picture on the left is an angle measured to target 1 in the forward face (face 1), in this case it measures 60 Degrees - I am happy with this.
The picture on the right shows the telescope reversed, so the instrument is now in the reverse face, face 2 (Blue line). The angle the instrument reads is still 60 degrees, but is now read from the opposite side of the circle. The instrument then sights back to target 1 (clockwise) but continues to increment the angle from 60 degrees so the face 2 angle would be 240 degrees.
Similarly if the face 1 angle read 330 degrees to target 1, then by reversing the telescope 180 degrees and then sighting back to target 1 the angle would still increment from 330 degrees by 180 degrees giving a face 2 angle of 510 degrees. But any angle greater then 360 would have 360 subtracted from it so the actual face 2 angle would read 510 - 360 = 150 degrees.
Have I nailed it or shall I get my head examined?
Can someone confirm?
Thank you.
I have trying to learn how to survey. I am not an engineer or work in surveying however I have access to a Trimble S8 Total station and i am trying to learn how to use it off my own back.
I was wondering if anyone out there in the community could explain how Face 1 and Face 2 angles are observed using a total station or theodolite for that matter.
Below/attached is a diagram of how I think face 1 and face 2 observations are recorded.
The picture on the left is an angle measured to target 1 in the forward face (face 1), in this case it measures 60 Degrees - I am happy with this.
The picture on the right shows the telescope reversed, so the instrument is now in the reverse face, face 2 (Blue line). The angle the instrument reads is still 60 degrees, but is now read from the opposite side of the circle. The instrument then sights back to target 1 (clockwise) but continues to increment the angle from 60 degrees so the face 2 angle would be 240 degrees.
Similarly if the face 1 angle read 330 degrees to target 1, then by reversing the telescope 180 degrees and then sighting back to target 1 the angle would still increment from 330 degrees by 180 degrees giving a face 2 angle of 510 degrees. But any angle greater then 360 would have 360 subtracted from it so the actual face 2 angle would read 510 - 360 = 150 degrees.
Have I nailed it or shall I get my head examined?
Can someone confirm?
Thank you.
