Grid north is established by?

Grid north is established by?

• A. True north lines
• B. The curved meridians
• C. The vertical grid lines on the map
• D. The contour lines

Answer: (C)

Grid north is defined by the map’s grid system—the vertical grid lines that run top to bottom establish the north direction for grid-based navigation. When you work with grid bearings or coordinates, you’re aligning with these straight grid lines, not with geographic north or magnetic north. The curved meridians are real-world longitude lines that bend on most map projections, so they don’t set the grid’s direction. Contour lines show elevation and don’t influence which way is north on the grid. So, grid north is the direction along the map’s vertical grid lines, providing a consistent frame of reference for grid references.

Grid north is defined by the map’s grid system—the vertical grid lines that run top to bottom establish the north direction for grid-based navigation. When you work with grid bearings or coordinates, you’re aligning with these straight grid lines, not with geographic north or magnetic north. The curved meridians are real-world longitude lines that bend on most map projections, so they don’t set the grid’s direction. Contour lines show elevation and don’t influence which way is north on the grid. So, grid north is the direction along the map’s vertical grid lines, providing a consistent frame of reference for grid references.