In a map grid system, how are grid lines distinguished?

In a map grid system, how are grid lines distinguished?

• A. All grid lines are the same thickness.
• B. Every 5th line is heavier.
• C. Every 2nd line is labeled with numbers.
• D. Every 10th line is heavier.

Answer: (D)

Visual distinction of grid lines is what this question is about. In many map grid systems, a heavier line is used at regular intervals to create easy visual milestones that help you read coordinates and estimate distances quickly. Making every tenth line heavier gives a clear cadence along the grid, so you can count tens of units at a glance and locate your position more efficiently. This heavier pattern serves as a dependable reference without cluttering the map, unlike lines that are all the same thickness or a different, more frequent labeling pattern. So, using a heavier line every tenth grid line is the standard way to distinguish the grid.

Visual distinction of grid lines is what this question is about. In many map grid systems, a heavier line is used at regular intervals to create easy visual milestones that help you read coordinates and estimate distances quickly. Making every tenth line heavier gives a clear cadence along the grid, so you can count tens of units at a glance and locate your position more efficiently. This heavier pattern serves as a dependable reference without cluttering the map, unlike lines that are all the same thickness or a different, more frequent labeling pattern. So, using a heavier line every tenth grid line is the standard way to distinguish the grid.