A

B

A

B

How would you show Mt. St. How would you show Mt. St. Helens on a map?Helens on a map?

Topographic Map!Topographic Map!

What is a topographic map?What is a topographic map? These maps These maps

describe the shape describe the shape of the land. They of the land. They define and locate define and locate natural and man-natural and man-made features.made features.

Topographic maps Topographic maps do this by showing do this by showing the features the features elevation.elevation.

Contour LinesContour Lines The topography is The topography is

shown by shown by contours contours lineslines..

Contour lines are Contour lines are imaginary lines that imaginary lines that show equal show equal elevation. elevation.

Each contour line Each contour line connects all points connects all points on the map that has on the map that has equal elevation.equal elevation.

CONTOUR INTERVALSCONTOUR INTERVALS The difference in The difference in

elevation between elevation between one contour line one contour line and the next is and the next is called a called a contour contour interval.interval.

Interpreting a Topographic MapInterpreting a Topographic Map http://www.csuchichttp://www.csuchic

o.edu/lbib/maps/Mo.edu/lbib/maps/MAP3.GIFAP3.GIF

Landforms on a topographic mapLandforms on a topographic map

Rivers, hills, cliffs, Rivers, hills, cliffs, depressions, depressions, buildings, etc.buildings, etc.

Landforms on a topographic mapLandforms on a topographic map

CLIFF/DEPRESSIONCLIFF/DEPRESSION

Converting topographic map to sizeConverting topographic map to size

http://www.tasagrahttp://www.tasagraphicarts.com/activiphicarts.com/activities/profile.htmlties/profile.html