I'm trying to remember how to adjust a three-wire level run. Is it distance to a turning point from the beginning benchmark multiplied by the error of closure? Then, add the product to the turning point?
Field Dog, post: 388821, member: 9186 wrote: I'm trying to remember how to adjust a three-wire level run. Is it distance to a turning point from the beginning benchmark multiplied by the error of closure? Then, add the product to the turning point?
The correction would be the distance between each benchmark (or T.P.) divided by the total length then that times the closing error would give your correction.
Correction = - ( dist. ( BM1 to BM2)) /L X total error in closure
Then Corr. = - ( dist.(BM2 to BM3))/L X total error in closure
Corr. = - ( dist. (BM3 to BM4))/L X total error in closure
etc.,etc.,etc.,
L = total length of the level run be carful of your "sign"
JOHN NOLTON
