What is the function of a "meridian" in surveying?

A meridian in surveying serves as an important reference line that identifies locations along a north-south direction. This is particularly significant because meridians are used in conjunction with parallels (latitude lines) to define a grid system for mapping and land division. The prime meridian, for instance, is a foundational line that helps in establishing time zones and geographical coordinates.

Meridians are critical for ensuring accurate measurements in surveying, as they can be used for aligning property boundaries and ensuring that properties are accurately surveyed in relation to their geographic position. Understanding the function of a meridian is essential for surveyors to create precise maps and documents that reflect the legal and physical characteristics of land.

Other options are unrelated to the primary function of a meridian; for instance, marking boundaries of national parks, determining elevation points, or indicating new property developments do not directly involve the role of meridians in surveying practices.