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Aim: How to Read a Topographic Map

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Aim:How to Read a Topographic Map

Objective: Ability to read a map, correctly

Vocabulary: topography, topographic

Most maps show distances

Where things are located

What is produced in an area

Topographic maps show the topography

Show the contours of the land

Show “height and depth”

Contour Interval

Simple Topographic Map

Contour Lines

More Complex Topographic Map

Topographic Map

Shows heights

What is the highest elevation of this map?

The lowest?

- First determine the contour lines
- Then determine the contour intervals

- Topographic maps use contour lines.
- A contour line on a map connects points that are at the same distance above, or below, sea level
- For example, the 20' contour line connects all points on the map that are exactly 20' above sea level.

- The contour interval is the vertical distance represented between adjacent contour lines.
- If the contour interval is 10', then after the 20’ contour line would be the 30’ contour line.
- If a point on a map is between the 20' and the 30' contour lines, then you know its greater than 20' above sea level and less than 30' above sea level

- The spacing of contour lines on a map tells you how "steep" the slope is.
- If you turned a soup bowl upside down it would look like this

Copy it !

What is the lowest elevation?

What is the next highest elevation?

Now you can determine the interval

Which side would you want to climb, N or S.

Why?

You make a topographic map by connecting various elevations with a contour line?