hello.
good evening everybody,
i am a junior surveyor working in cement plant in Africa.
i am a beginner to survey field.
in my project there are various buildings, i think columns of structure not in vertical.that's why i want to check my rectangular columns with lieca builder 490.
plz tell me how i can check the vertical of columns with total station.
Replies
Hey,
If you want to establish the vertical and rectangular accuracy fo that buildings, you have to find the control points used to build those structures, then start collecting asbuilt info to compare what is built vs what was projected.
as mentioned by john earlier you set up the instrument and you could check the deviation in structure but you cant explain it to your engineer unless you convert the angular difference in to linear measurement.
you must need to know this inside out...
both systems grad & degrees are explained below
unit Gon (400)
1 gon = 1m per 63 m
0.001 gon = 1 mm per 63 m
Unit degrees (360 degrees , decimal)
1 degree = 1 m per 57 m
0.001 degree = 0.001 mm per 57 m
Remember
Read it like m, dm, cm or mm per 63 or 57 m
you can now apply Pythagorean theorem to determine the value...
check object distance with reflector less or with prism.
tan(angular difference) *dis= ans
e.g: difference was 25" in decimal 0.0069
and distance is 50 m
tan 0.0069*50=0.0060m
HOPE THIS WILL HELP
CORRECT..............
thanks john
Can anyone help Jazu?
thanks mr john.
but i would like to know the rectongular structure is it in vertical or not vertical.
if not vertical how much the error.
thats why i can correct my rectongular structure.
please tell me the correct solution.
iam in big confusion
how much error how i can say..
This helpful document may help you with this...i used to have a tutorial but i'll need to dig it up when I get home..