principal meridian

A principal meridian is a primary north–south reference line used in land surveying to establish a coordinate framework for mapping and property boundaries within a specific region.

Observed surface forms (1)

• line of longitude ×2

Instances (5)

• Prime Meridian via concept surface "line of longitude"
• Humboldt meridian
• Mount Diablo meridian
• International Date Line via concept surface "line of longitude"
• San Bernardino meridian