What is the map scale of the USGS topographic map used in the Sector Reference System?

• A. 1:24,000
• B. 1:50,000
• C. 1:100,000
• D. 1:250,000

Answer: (A)

Understanding map scale helps you see how much of the real world a map covers and how detailed it is. In the Sector Reference System, the standard USGS topographic sheets are the 7.5-minute quads, which use a 1:24,000 scale. This means one unit on the map represents 24,000 units on the ground, giving enough detail to read contour lines, see roads and trails, and identify terrain features, while keeping the map sheet reasonably sized for field work. Larger-scale maps (like 1:50,000) would show less detail, and smaller-scale maps (1:100,000 or 1:250,000) would omit important features needed for precise sector references. So the map scale used is 1:24,000.