What is a labeled brown line on a topographic map called?

Topographic contours are shown in brown by lines of different widths. Each contour is a line of equal elevation; therefore, contours never cross. They show the general shape of the terrain. To help the user determine elevations, index contours are wider.



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These areas can remind us to live sustainably.] ? What do the smooth brownish parallel lines around the map represent? [They represent elevation.]

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The Brown Line of the Chicago L system, is an 11.4-mile (18.3 km) route with 27 stations between Chicago's Albany Park neighborhood and downtown Chicago. It runs completely above ground and is almost entirely grade-separated.

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