A six-digit grid coordinate is used to locate a point on a map. What does it specify?

• A. It locates a point using easting and northing values with 10-meter precision.
• B. It locates a point using easting and northing values that provide 100-meter precision.
• C. It locates a point using latitude and longitude in decimal degrees.
• D. It locates a point using three-digit numbers for grid zones.

Answer: (B)

A six-digit grid coordinate uses easting and northing values in meters within a grid zone, with three digits for each axis. Each added digit increases precision by an order of magnitude, so three digits per axis give 100-meter precision. In practice, this pinpoints a specific 100 m by 100 m square on the map. Latitude/longitude decimals are a different system, and don’t describe a six-digit grid reference, which is why this option best matches how grid coordinates convey location and accuracy.