Longitude &amp; Latitude

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# Longitude &amp; Latitude - PowerPoint PPT Presentation

Longitude &amp; Latitude. Remember…its like graphing in math class. Typical Graph. (3,8). (9,5). Y. X. (0,0). East West, North South on The Earth. Let the X axis be the Equator. Let the Y axis be the Prime Meridian that runs through Greenwich outside of London.

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Presentation Transcript
Typical Graph

(3,8)

(9,5)

Y

X

(0,0)

East West, North South on The Earth
• Let the X axis be the Equator.
• Let the Y axis be the Prime Meridianthat runs through Greenwich outside of London.
• Lat/Long are the 2 grid points bywhich you can locate any point on earth.

Y

X

East West, North South on the Earth

N

• Let each of the four quarters then be designated by North or South and East or West.

W

E

S

East West, North South on the Earth
• The N tells us we’re north of the Equator. The S tells us we’re south of the Equator.
• The E tells us that we’re east of the Prime Meridian. The W tells us that we’re west of the Prime Meridian.

(N, W)

(N, E)

(S, W)

(S, E)

East West, North South on the Earth
• That means all points in NorthAmerica will have a North latitude and a West longitude because it is North of the Equator and West of the Prime Meridian.

(N, W)

Prime Meridian

East West, North South on the Earth
• What would be the latitude and longitude directions in Australia?

?

Prime Meridian

If you said South and East , you’re right!

What is Latitude?
• All points along the equator have a value of 0 degrees latitude.
• North pole = 90°N
• South pole = 90°S
• Values are expressed in terms of degrees.

90°N

Y

X

90°S

What is Longitude?
• Longitude is the distance from the prime meridian along the X axis.
• All points along the prime meridian have a value of 0 degrees longitude.
• The earth is divided into two parts, or hemispheres, of east and west longitude.

Y

X

180°W

180°E

What is Longitude?
• The earth is divided into 360 equal slices (meridians)
• 180 west and 180 east of the prime meridian

Y

X

180°W

180°E

Orange cut through lines of longitude

Orange cut through lines of latitude

East is the direction of rotation of the Earth

Latitude: (90oN to 90oS)

Longitude: (180oE to 180oW)

Prime Meridian

0o Longitude

Tropic of Cancer

Latitude 23½o North

21st June

66½o

90oE

60oE

30oW

30oE

60oW

90oW

23½o

90o

22nd Sept

20th March

North Pole

Equator

Latitude 0o

23½o

900

22nd December

Tropic of Capricorn

Latitude 23½o South

Longitude 90o West

Longitude 90oEast

Longitude 60o West

Longitude 60o East

Longitude 30o West

Longitude 30o East

South Pole

Positioning on the Earth’s Surface

Latitude and Longitude together enable the fixing of position on the Earth’s surface.