Transcript WHAT IS LONGITUDE AND LATITUDE

WHAT IS LONGITUDE
AND LATITUDE
Notes in SINK
HOW IT STARTED!
• A key geographical
question
throughout the
human experience
has been, "Where
am I?"
HISTORY
•
In classical Greece and China, attempts
were made to create logical grid systems
of the world to answer this question.
• The ancient Greek geographer Ptolemy
created a grid system and listed the
coordinates for places throughout the
known world in his book Geography.
• But it wasn't until the middle ages that the
latitude and longitude system was
developed and implemented.
• This system is written in degrees, using
the symbol °.
DEFINITION
(SINK)
• a system developed by
Geographers to pinpointing exact
or absolute locations everywhere
on Earth.
• Geographers use a grid made up of
two sets of lines that cross each
other, like the lines on graph paper.
• You can identify any place on Earth
by saying which two grid lines
cross there.
GLOBES
(SINK)
• The globe is the more accurate way to
show Earth, since the globe is
spherical like Earth.
• The North Pole is the farthest
Northern point on a globe
• The South Pole is the most Southern
point on a globe.
• All directions on Earth are figured
from these two points.
LINES ON A GLOBE
• There are important lines
on a globe.
• First there are parallels or
latitude lines.
• Second, there are
meridians or longitude
lines.
LINES OF LATITUDE
• Lines of latitude are imaginary
circles that run east and west
around the globe – known as
parallels.
• These parallels divide the globe
into degrees.
• Lines of latitude measure
distance north and south of the
equator.
LINES OF LATITUDE-EQUATOR
• The Equator is 0 degrees
latitude.
• The letter “N” or “S” that follows
the degree symbol tells you if the
location is north or south of the
equator.
• Ex: North Pole- 90 degrees N
latitude
• South Pole- 90 degrees S
latitude
LINES OF LONGITUDE
• Lines of Longitude, are
imaginary lines also known
as meridians, run from the
North Pole to the South
Pole.
• Longitude measures
distance east and west of
the Prime Meridian.
PRIME MERIDIAN
• Prime Meridian is 0 degrees
longitude.
• An imaginary line that runs North
and South and divides the earth
into Western and Eastern
Hemispheres.
• The letter “E” or “W” tells you if
the location is east or west of
the Prime Meridian.
EASTERN AND WESTERN
HEMISPHERES
• Everything east of the
Prime Meridian for 180
degrees is in the Eastern
Hemisphere.
• Everything west of the
Prime Meridian for 180
degrees is in the Western
Hemisphere.
LATITUDE AND LONGITUDE
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