+rogbarn Posted August 25, 2002 Share Posted August 25, 2002 We have many survey disks in my area that don't have reference disks but do have an azimuth disk. I've noticed many times that they are placed where the street makes a big dip and goes back up with the main station placed near the top of one side and the azimuth mark near the top of the other side. Usually they are placed roughly 1/3 mile apart. I don't mind walking 1/3 of a mile to find the azimuth from the main station, but noticed that I was climbing a lot of hills in the process! I assume this is done so that they have a clear sight from on to the other of the appropriate distance. Has anyone else noticed this? Quote Link to comment
survey tech Posted August 25, 2002 Share Posted August 25, 2002 You are right Rog, thats exactly what they intended, to provide what is known in surveying as a good long backsight. The line formed by the two points gives the surveyor a precise known direction from which to work. Quote Link to comment
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