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# Aim: How to Read a Topographic Map PowerPoint PPT Presentation

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”.

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”

### Topographic Maps

Contour Interval

Simple Topographic Map

Contour Lines

### Topographic Maps

More Complex Topographic Map

### Topographic Maps

Topographic Map

Shows heights

What is the highest elevation of this map?

The lowest?

### To read a topographic map

• First determine the contour lines

• Then determine the contour intervals

### Contour Lines

• 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.

### Contour Intervals

• 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

### Contour Intervals

• 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 !

### Examine this topographic map

What is the lowest elevation?

What is the next highest elevation?

Now you can determine the interval

### Examine this topographic map

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

Why?

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