What useful plot can be derived from a contour map?

What useful plot can be derived from a contour map?

• A. Profile plot
• B. Elevation diagram
• C. Heat map
• D. Slope map

Answer: (A)

Contours encode how elevation changes over a landscape. By choosing a straight line across the map and tracing how elevation varies along that line, you turn the 2D contour information into a cross-sectional graph—a profile plot. This plot shows elevation on the vertical axis and distance along the line on the horizontal axis, making slopes, ridges, and valleys easy to compare along that transect. To construct it, pick endpoints, measure the distance along the line, and interpolate elevations from the contour lines as you move along the path. The result is a clear, continuous view of how the terrain rises and falls, which isn’t as directly visible from the contour map alone. Other representations like a heat map or a slope map convey different kinds of information and aren’t the standard, straightforward way to extract a line-by-line elevation story from contour data.

Contours encode how elevation changes over a landscape. By choosing a straight line across the map and tracing how elevation varies along that line, you turn the 2D contour information into a cross-sectional graph—a profile plot. This plot shows elevation on the vertical axis and distance along the line on the horizontal axis, making slopes, ridges, and valleys easy to compare along that transect. To construct it, pick endpoints, measure the distance along the line, and interpolate elevations from the contour lines as you move along the path. The result is a clear, continuous view of how the terrain rises and falls, which isn’t as directly visible from the contour map alone. Other representations like a heat map or a slope map convey different kinds of information and aren’t the standard, straightforward way to extract a line-by-line elevation story from contour data.