Levelling is an optical method that provides measurements of geodetic heights using a level that is configured to read a levelling staff for measuring and calculating elevation at selected positions. Deciding whether the levelling staff is in the vertical position depends solely on the opinion of the surveyor brings with it incorrect measurement data due to human error especially in low-light or no-light.
The present invention relates to a levelling staff and a level for a geodetic levelling. More specifically, the present invention relates to lighted levelling staff which is used to determine the difference in height between points or heights of points above a datum surface.
•Perform accurate measurement while minimizing human error in low-light
or no-light conditions
•Easy to produce