Using Latitude and
Longitude
Objective:
•To define the terms: latitude, longitude, parallel,
meridian, and global grid.
• To locate destinations using lines of latitude and
longitude.
Latitude and Longitude
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The most exact way to locate places on Earth is by using
imaginary lines of latitude and longitude.
These lines are measured in degrees [˚].
Latitude
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Lines of latitude run east and west around the Earth.
Lines of latitude are also called parallels because the
lines are always parallel, or the same distance apart.
The equator is the longest line of latitude [0˚].
All other lines of latitude are up to 90˚, either north or
south of the equator.
Longitude
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Lines of longitude run north and south around the Earth.
Lines of longitude are also called meridians.
Unlike lines of latitude, lines of longitude are all the
same size and are not parallel.
The prime meridian is 0˚longitude.
All other lines of longitude are up to 180˚, either east or
west of the prime meridian.
Global Grid
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When used together, latitude and longitude form a
pattern of crossed lines called a global grid.
This allows any location on Earth to have an exact
location.
Let’s Review
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What is another name for the imaginary lines that run
east and west? How did they get their name?
What is another name for the imaginary lines that run
north and south? How did they get their name?
Why are lines of latitude and longitude helpful?