Contour lines that resemble dashes indicating small elevation changes are termed?

Contour lines that resemble dashes indicating small elevation changes are termed?

• A. Supplementary Contour Lines
• B. Index Contour Lines
• C. Intermediate Contour Lines
• D. Contour Lines

Answer: (A)

Supplementary contour lines are the dashed lines used to show small elevation changes that aren’t significant enough to justify a solid line. On topographic maps, bold index contours mark larger elevation steps and are labeled, while the lines between them can be solid (intermediate contours) to fill in the relief. When terrain is relatively flat or the map needs extra detail without cluttering with solid lines, the dashed supplementary contours fill in those tiny elevation differences. So the dashed, sparse lines indicating minor height changes are best described as supplementary contour lines.

Supplementary contour lines are the dashed lines used to show small elevation changes that aren’t significant enough to justify a solid line. On topographic maps, bold index contours mark larger elevation steps and are labeled, while the lines between them can be solid (intermediate contours) to fill in the relief. When terrain is relatively flat or the map needs extra detail without cluttering with solid lines, the dashed supplementary contours fill in those tiny elevation differences. So the dashed, sparse lines indicating minor height changes are best described as supplementary contour lines.