In the 1:1000 maps, which position corresponds to the top left shading?

• A. sec. 1-A
• B. sec. 1-B
• C. sec. 2-A
• D. sec. 2-B

Answer: (A)

When reading a 1:1000 map, the sheet is split into four quadrants in a 2-by-2 grid. The top row uses the number 1, and the left and right columns are labeled A and B. So the top-left quadrant is the block labeled 1-A. Therefore, the shading in the top-left position corresponds to that section. The other quadrants are top-right 1-B, bottom-left 2-A, and bottom-right 2-B, which is why they don’t match the top-left shading.