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Fundamentals of Physical Geography

2nd Edition
James Petersen
ISBN: 9781133606536

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BuyFindarrow_forward

Fundamentals of Physical Geography

2nd Edition
James Petersen
ISBN: 9781133606536
Textbook Problem

What is the approximate amount of local relief depicted on this map? Is the scale of this topographic map larger or smaller than that of the topographic maps in the other map exercises in the book?

images

Glaciated terrain in Glacier National Park.

Chief Mountain, Montana

Scale 1:125,000

Contour interval = 100 ft

U.S. Geological Survey

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To determine

The approximate amount of local relief depicted on this map and whether the scale of this topographic map larger or smaller than that of the topographic maps in the other map exercises in the book.

Explanation

“Relief is defined as the difference in elevation between two points. It is calculated by subtracting the highest elevation from the lowest elevation in an area”. The maximum relief on a topographic map is the difference between the highest elevation and lowest elevation points on the map. For example, if a mountain has an elevation of 7,000 feet and a nearby valley has an elevation of 2,000 feet, the relief between the two is 5,000 feet.

From the given topographic map, consider the highest and lowest benchmark values as follows:

Highest elevation point = 7601 ft.Lowest elevation point = 616 ft.

The formula to calculate local relief is expressed as follows:

Relief = Highest elevation - Lowest elevation 

Substitute 7601 ft in highest elevation and 616 ft in lowest elevation in the above formula as follows:

Relief = 7601 f 

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