What should be carefully compared and checked along borders of adjoining sheets?

• A. The colors used on the maps
• B. The legends and symbols
• C. Boundaries, to avoid omitting or duplicating side shots
• D. The scale of the maps

Answer: (C)

The key idea is ensuring seamless alignment where map sheets meet. When two sheets are placed together, the boundary line and any features that fall along that edge must line up exactly on both sides. If you don’t carefully compare and verify borders, you can end up with gaps, overlaps, or duplicated features right at the seam, which is what “omitting or duplicating side shots” refers to. So checking the boundaries guarantees continuity of data along adjoining sheets, making the map reliable at the joins.

Colors, legends, and symbols should be consistent across sheets, and scale should be uniform, but these aspects don’t directly address ensuring a clean, continuous edge between sheets.