Procedure of preparing contour map using total station1) Preliminary set up –
Fix the total station over a station and level it.
Press the power button to switch on the instrument. level instrument using electronic vial. Set bisection target as prism.
Select MODE B -------> S function------->file management------>create (enter a name)------->accept.
Then press ESC to go to the starting page.
2) Then go to S function ------> measure-----> rectangular co-ordinate---->station ---
>press enter. Here enter the point number or name, X,Y,Z co-ordnates, instrument height and prism code. Then press accept (Fs)
3) Adopt Cross section method for establishing the major grid around the study area.
Project suitably spaced cross sections on either side of the centre line of the area.
Choose several points at reasonable distances on either side.
4) Orient the instrument to the magnetic north, or any other referance direction. Then set zero by double clicking on 0 set (F3).
5) Keep the reflecting prism on the first point and turn the total station to the prism, focus it and bisect it exactly using horizontal and vertical clamps. Then select MEAS and the display panel will show the point specification. Now select edit and re-enter the point number or name point code and enter the prism height that we have set.
6) Then press MEAS/SAVE (F3) so that the measurement to the first point will automatically be saved and the display panel will show the second point. Then turn the total station to second point and do the same procedure. Repeat the steps to the rest of the stations and get all point details.
7) Transfer the data stored in file to computer in the appropriate format.
8) Using appropriate application software, contour map will be prepared.