At this site you will learn how to read and use topographic
maps. There are many times in life when topographic maps are useful.
The skills you learn at this site will serve you well.
What is a topographic map?
A topographic map is a three dimensional representation of the earth,
or a specific part of it. Topographic maps are different from other
types of maps because they use contour lines to show the shape and elevation
of the earth's surface. Each contour line show one elevation and all
points along a contour line are equal. When there is a change in elevation
it is depicted with another contour line. Contour lines that are very
close together indicate a steep change in elevation.Likewise, an area
where contour lines are spread far apart indicates a slow change in
elevation or no change at all.
In addition to contour, topographic maps show the location
of physical features such as buildings, streets, streams, and woods.
Symbols are used to represent these features. If a group of maps was
created for a specific purpose, such as to show roadways, the symbols
on each map will be the same. However, it is always important to check
the legend so that you know what the symbols represent. We will learn
more about legends as we continue.
