"transit level"的定义和意义

What is a "transit level"?

A transit level is a type of optical instrument used to measure horizontal and vertical angles with high precision. It consists of a telescope mounted on a tripod that can rotate horizontally and vertically. The instrument uses a spirit level to ensure the telescope is aligned properly, allowing the user to accurately measure and transfer levels over long distances. Transit levels are commonly used in construction, surveying, and engineering for tasks like establishing grades, measuring elevations, and mapping land. They offer greater accuracy than simpler levels and are ideal for large-scale projects.