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Latitude
(shown as a horizontal line) is the angular distance,
in degrees, minutes, and seconds of a point north or south
of the Equator. Lines of latitude are often referred to as
parallels.

Longitude
(shown as a vertical line) is the angular distance,
in degrees, minutes, and seconds, of a point east or west of
the Prime (Greenwich) Meridian. Lines of longitude
are often referred to as meridians.

Distance between Lines
If you divide the circumference of the earth (approximately
40 000 kilometres) by 360 degrees,
the distance on the earth's surface for each one degree of
latitude or longitude is just over 111 km. Note: As
you move north or south of the equator, the distance between
the lines of longitude gets shorter until they actually meet
at the poles, 45 degrees N or S of the equator. One
degree of longitude is about 79 kilometres.

Minutes and Seconds
For precision purposes, degrees of longitude and latitude
have been divided into minutes (') and seconds ("). There
are 60 minutes in each degree. Each minute is divided into
60 seconds. Seconds can be further divided into tenths,
hundredths, or even thousandths.

For example,
our school, Woodvale Primary, is located in Western
Australia at 31 degrees, 47 minutes, and 39.7 seconds south
of the equator, and 115 degrees, 47 minutes and 36.82
seconds east of the Prime Meridian.

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