What does a solid blue line with light blue fill indicate on a map?

What does a solid blue line with light blue fill indicate on a map?

• A. Perennial ponds or streams
• B. Intermittent streams
• C. Elevation contours
• D. Political boundaries

Answer: (A)

On maps, blue indicates water features. A solid blue line with light blue fill shows a watercourse that carries water year-round—the water is present in all seasons, i.e., a perennial stream (or similar perennial water feature). If the line were dashed, it would usually indicate an intermittent stream that only flows part of the year. Elevation contours are shown as brown or black lines that indicate height, not water, and political boundaries are drawn in other colors and styles. So the symbol described points to watercourses that persist year-round.