How many digits identify a 100-meter grid square?

How many digits identify a 100-meter grid square?

• A. Six digits identify a 100-meter grid square.
• B. Eight digits identify a 10-meter grid square.
• C. Four digits identify a 1-kilometer grid square.
• D. Seven digits identify a 50-meter grid square.

Answer: (A)

Precision in grid references comes from how many digits you use for the easting and northing inside a given grid cell. Within a 100 km square, three digits for the easting and three for the northing pinpoints a specific 100-meter square. Each additional digit adds a tenth of that resolution, so adding another digit per axis would give 10-meter squares, and fewer digits would give larger squares like 1 kilometer. Since a 100-meter grid square requires three digits for each axis, the total is six digits.

Precision in grid references comes from how many digits you use for the easting and northing inside a given grid cell. Within a 100 km square, three digits for the easting and three for the northing pinpoints a specific 100-meter square. Each additional digit adds a tenth of that resolution, so adding another digit per axis would give 10-meter squares, and fewer digits would give larger squares like 1 kilometer. Since a 100-meter grid square requires three digits for each axis, the total is six digits.