Which grid system uses a quadrillage near the equator?

• A. Transverse Mercator Grid
• B. Military Grid (UTM)
• C. British Grid
• D. Orthomorphic Grid

Answer: (B)

The grid that uses a quadrillage (a grid of uniform 100 km squares) across map sheets is tied to the UTM system. In the Military Grid Reference System built on UTM, the world is divided into 60 zones, each using a transverse Mercator projection and overlaid with a consistent 100 km square grid. That 100 km grid is the quadrillage you see on many maps and is used to reference locations quickly and unambiguously.

This setup works well near the equator because within each zone the projection distortion is minimized in the area covered by the zone, so the grid squares remain practically uniform in size and shape for practical navigation and labeling. The other options either refer to different types of projections or local/global grids that don’t feature this worldwide 100 km square grid overlay.