Which organization is commonly associated with producing and maintaining topographic maps in the United States?

• A. USGS
• B. NASA
• C. NOAA
• D. EPA

Answer: (A)

The main idea is identifying which agency is responsible for creating and maintaining the nation’s standard topographic maps. The United States Geological Survey is best known for this role. For decades, the USGS has produced the classic topographic maps that depict elevation with contour lines and terrain features, and it now provides these as digital data through the National Map and related elevation datasets. This work underpins many activities from outdoor navigation to land planning and scientific research. Other agencies like NASA, NOAA, or the EPA have important missions—space science, weather/ocean/climate data, and environmental protection, respectively—but they are not the primary producers of the standard U.S. topographic maps.