Level (Optical Level)

An optical level is a precise tool used in surveying and construction to measure differences in elevation between points. It consists of a telescopic device with a built-in spirit level to ensure accuracy, and it uses a telescope and a leveling instrument to sight on a leveling staff placed at various locations. By observing the staff's readings, users can determine height differences, helping to create accurate plans, establish level foundations, or ensure structures are aligned properly. Essentially, it’s a specialized instrument that helps measure sloped or uneven terrain to establish a consistent height reference across a site.