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TOPOGRAPHIC MAPS

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Page 1: A topographic map is a special type of map that shows the “contour” of the land. For this reason, they are sometimes referred to as a “contour map”

TOPOGRAPHIC MAPS

Page 2: A topographic map is a special type of map that shows the “contour” of the land. For this reason, they are sometimes referred to as a “contour map”

What is a topographic map

A topographic map is a special type of map that shows the “contour” of the land. For this reason, they are sometimes referred to as a “contour map”.

Page 3: A topographic map is a special type of map that shows the “contour” of the land. For this reason, they are sometimes referred to as a “contour map”

What does a topographic map look like.

Page 4: A topographic map is a special type of map that shows the “contour” of the land. For this reason, they are sometimes referred to as a “contour map”

Important things about contour maps

Elevations are typically referenced to sea level.

A contour line connects points of the same elevation. A type of isoline.

A contour interval is the difference in elevation between two contour lines next to one another.

A hachure is a special type of contour line that shows a depression.

Page 5: A topographic map is a special type of map that shows the “contour” of the land. For this reason, they are sometimes referred to as a “contour map”

Elevations referenced to sea level!

Page 6: A topographic map is a special type of map that shows the “contour” of the land. For this reason, they are sometimes referred to as a “contour map”

Example of a contour line & contour interval

Contour Line

Contour

Interval equals 20 feet.

Page 7: A topographic map is a special type of map that shows the “contour” of the land. For this reason, they are sometimes referred to as a “contour map”

Example of a hachured line.

Page 8: A topographic map is a special type of map that shows the “contour” of the land. For this reason, they are sometimes referred to as a “contour map”

Important things about contour maps

North is usually “up” on the map, but not always. You have to check the “compass arrow”

True North is the direction, that if you travelled, you would eventually arrive at the north pole.

Magnetic North is the direction, that if you travelled, you would arrive at the magnetic north pole. (They’re not in the same place!)

Page 9: A topographic map is a special type of map that shows the “contour” of the land. For this reason, they are sometimes referred to as a “contour map”

What does this look like

Page 10: A topographic map is a special type of map that shows the “contour” of the land. For this reason, they are sometimes referred to as a “contour map”

Important things about contour maps

Magnetic declination is the difference in angle between true north and magnetic north

Contour maps have a legend, which explains the symbols on the map.

Contour maps typically have a bar scale, that shows horizontal distance on the map

Page 11: A topographic map is a special type of map that shows the “contour” of the land. For this reason, they are sometimes referred to as a “contour map”

Important things about contour maps

Slope, which is a type of gradient, shows the “steepness” of an area. The closer the contour lines the steeper the slope!

Streams flow down gradient, from higher to lower elevation. Contour lines make a V or U, the closed end of which, points upstream.

Page 12: A topographic map is a special type of map that shows the “contour” of the land. For this reason, they are sometimes referred to as a “contour map”

Huh! . . What do you mean

Page 13: A topographic map is a special type of map that shows the “contour” of the land. For this reason, they are sometimes referred to as a “contour map”

Maximum Contour Line vs.Maximum Possible Elevation


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