Final answer:
In land surveying, meridians run north-south and are associated with longitudes, while parallels run east-west and correspond to latitudes.
Step-by-step explanation:
When surveying land, the meridian runs north-south, while the parallel runs east-west. Meridians are lines that connect the North and South Poles and are used in the determination of longitude, which is measured in degrees east or west from the Prime Meridian.
Parallels are lines of latitude that run around the Earth horizontally and are parallel to the equator. They are used to measure distances north or south of the Equator..
Therefore, in a surveyor's grid, meridians indicate the vertical grid lines that go from pole to pole, while parallels indicate the horizontal grid lines that wrap around the Earth.
The understanding of this grid system is essential for precise navigation, mapping, and land division.