Services

Levelling

Levelling is defined as “an art determining the relative height of different point on, above or below the surface. Definition, technical tearms, uses, details of levels such as dumpy, tilting and auto levelling staff, temprary and permanent adjustment of dumpy and auto level, corrections curvature, refraction, combine and sensitiveness, reciprocal levelling, collimation and rise & fall method, errors, precaution.