Which of the following is the area of a six-digit grid coordinate?

A six-digit grid coordinate, often used in military maps, typically represents a specific point with a precision of 100 meters. This system divides the map into a grid where each square represents a designated area. The six-digit coordinate refers to a precise location within that square, which measures 100 meters by 100 meters. This allows for accurate positioning and navigation within the grid system, making it easier for military personnel to communicate locations and plan operations efficiently. The other options provide different measurements that do not align with the standard size representation of a six-digit grid coordinate, which is firmly established at 100 by 100 meters. Therefore, the choice of 100 meters by 100 meters as the correct answer is accurate based on the established mapping conventions used by military services.