AhaBulbStuff Everyone Should Know
AhaBulb: Stuff Everyone Should Know · ahabulb.com/scout-close-contours-steep

Contour lines on your map are packed very close together. What does that mean?

Steep ground. Close lines mean a steep slope.

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  1. The ground there is flat
  2. The slope there is steep ✔
  3. There is a lake or swamp there

Why: Each line is a step up or down in elevation. When the steps are crammed close, the land climbs fast. Lines far apart, or none at all, mean fairly level ground.

Huh, didn't know that: Wider index contours have their elevation numbers printed on them to help you read heights.

The dad joke
I tried to hike where the contour lines touched. It was an uphill battle.
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References

Answer: The slope there is steep. Each line is a step up or down in elevation. When the steps are crammed close, the land climbs fast. Lines far apart, or none at all, mean fairly level ground.

  1. USGS: Topographic Map Symbols pubs.usgs.gov/gip/TopographicMapSymbols/topomapsymbols.pdf
    Contours that are very close together represent steep slopes.
    Checked 2026-10-08.

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Outdoors & CampingOn a topographic map, what does a contour line connect?Outdoors & CampingWhy do contour lines on a topo map never cross each other?Outdoors & CampingWhy might the declination printed on an old topo map be wrong today?

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