The azimuth measured in map grid coordinates is known as which type of azimuth?

• A. geodetic
• B. astronomical
• C. grid
• D. magnetic

Answer: (C)

When you work with a map's coordinate system, directions are measured from the grid north—the direction of the map’s grid lines. The angle from grid north to the line you’re plotting or measuring is called a grid azimuth. This is distinct from other azimuths that reference true/geodetic north (geodetic/true azimuth), magnetic north (magnetic azimuth), or celestial directions (astronomical azimuth). The grid azimuth is what you use when expressing direction directly in the map’s grid coordinates, which is why it’s the correct designation here.