How accurate is a 6-digit grid?

• A. 50 meters
• B. 100 meters
• C. 500 meters
• D. 1000 meters

Answer: (B)

Six-digit grid coordinates fix a point to about 100 meters on the ground. The digits are split into easting and northing, with three digits for each axis, narrowing the location into a 100 m by 100 m square on the map. Fewer digits give coarser precision (larger squares), while more digits provide finer precision. For many standard grid references, six digits = 100 meters.