I am working on a big foundation job and everyday day they keep moving mounds of dirt on me always in my view!
I resection new points to work with everyday and i am using prisms mounted on the surrounding buildings in the area. Well everything is good but when its gets really hot the prisms shift on me and also its hard to take a good line onto a prism depending on the angle.
My problem is when i setup onto a knowing point and i need to stake out a line i can only take a back sight onto 1 prism (back sight) If that prism shifts say a 1/4" my angle is off a 1/4" for all my shots. I would like to before staking out a line take a back sight to 2 or 3 known back sights (or prisms) and adjust the error between all 3. Is this possible?
If i resection a point then my back sight is already adjusted for!! I dont want to resection new points though everyday i would like to work consistent with the same occupy point and adjust my back sights.