Latitude and Longitude

Latitude and Longitude

►The earth is divided into lots of lines called latitude and longitude.

Together they form a grid pattern on a map or globe

Lines of longitude only

Latitude added (Equator )Other lines of lat

& long added

Lines of Latitude

http://plantwatch.sunsite.ualberta.ca/library/images/lat.jpg

These parallel

lines on the

globe are lines

of latitude.

Latitude

North Pole

South Pole

Lines of latitude are numbered from 0° at

the equator to 90° N.L.

at the North Pole.

Lines of latitude are numbered from 0° at the equator to 90° S.L. at the South Pole.

][

90 80

7060

50

40

20

30

10

90

80

70

60

50

40

20

10

30

Latitude

The North Pole is at 90° N

The South Pole is at 90° S

The equator is at 0°

latitude. It is neither north nor south. It is at the center between north and south.

40° N is the 40° line of

latitude north of the equator.

40° S is the 40°

line of latitude south of the equator.

Lines of Latitude

►Lines of latitude run east and west.

►Latitude measures distance from the Equator towards the North or South pole

►Lines of latitude never meet (circles around the globe)

►The lines measure distances in degrees from the center of the earth.

The Equator

Latitude is

measured above

and below the

Equator in

degrees.

http://nationalatlas.gov/articles/mapping/a_latlong.html#thre

e

Where is 0 degree latitude ?

►The equator is 0 degree latitude.

►It is an imaginary belt that runs halfway point between the North Pole and the South Pole.

Equator

90 degrees.. ?

►There are 90 degrees of latitude in the Northern Hemisphere

&

► 90 degrees of latitude in the south pole.

►In total there are 180 degrees of latitude.

►WHY IS THE NORTH AND SOUTH POLE AT 90 degrees anyway?? Why that number?

LongitudeLines of longitude begin at the Prime Meridian.

60° W is the

60° line of

longitude west

of the Prime

Meridian.

The Prime Meridian is located at 0°. It is neither east or west

60° E is the 60°

line of longitude east of the Prime Meridian.

W E

Prime MeridianThe Prime Meridian (0°) and the 180° line split the

earth into the Western Hemisphere and Eastern Hemisphere.

Prime Meridian

Western Hemisphere

Eastern Hemisphere

Places located east of the Prime Meridian have an east longitude (E) address. Places located west of the Prime Meridian have a west longitude (W) address.

INTERNATIONAL DATE LINE180°

► SEPARATES 2 CALENDAR DAYS.

America to Asia – gain a day

Asia to America – lose a day

A location’s coordinates(____° N or S, ____ ° E or W)

By combining latitude and longitude, any location can be pinpointed

Lines of Longitude…

►Lines of longitude run north and south.

►Longitude meet at the North and South poles.

►Longitude measures distance East and West of the Prime Meridian

►The lines measure distances in degrees from the center of the earth.

Lines of Longitude

http://plantwatch.sunsite.ualberta.ca/library/images/long.jpg

Where is 0 degree longitude ?

►The prime meridian is 0 degrees longitude.

►It is located in Greenwhich England.

►From this point, Longitude runs 180 degrees East or West

►There are 360 meridians of Longitude in total

Longitude Angles

•Longitude is measured in

degrees east or west of the

Prime Meridian

•Angles are measured from

the centre of the earth

(vertex of angle) east or

west of the Prime Meridian

http://www.csmate.colostate.edu/cltw/cohortpages/viney/latitude.html

Orange cut through lines of longitude

Orange cut through lines of latitude

Latitude and Longitude combined

Latitude and longitude

measurements are based on

angle measurements as shown

in this diagram and previous

two diagrams

http://cache.eb.com/eb/image?id=64904&rendTypeId=4

What is the

Lat and Long

of this point?

http://www.digitalgeography.co.uk/wp-content/uploads/2007/07/grid.jpg

Hemispheres

►By using the equator and prime meridian, we can divide the world into four hemispheres, north, south, east, west

►Hemi= half

►Sphere = circle

Latitude lines run east/west but they measure north or south of the equator (0°) splitting the

earth into the Northern Hemisphere and Southern Hemisphere.

Time Zones

►The Earth is divided into 24 time zones, corresponding to 24 hours in a day.

►As the earth rotates, the sun shines in different areas, moving from east to west during the course of a day.

►Places that have the same longitudewill be in the same time zone.

LONGITUDE AND TIME

►The world rotates (spins) 360° in 24 hours.

360° / 24 hours = 15° per hour

►The world has 24 time zones, each l5°

apart.

THERE IS A 1 HOUR TIME DIFFERENCE FOR EVERY 15° OF

LONGITUDE

Time Zones: Daylight Savings

Earth rotates west to east Solar time is based on the position

of the sunNIGHT IS FALLING ON EARTH

Look at the East Coast of the United States. The lights are already lit.

California the sun is still visible.

This pictures shows

AMERICAN CITIES at

night.

Saguenay

Ottawa

Sept-Iles

Mexico

City

Québec

Montréal

St.John

Those light are Boston, New

York, Philadelphia and

Washington.

Toronto

Detroit

Miami

Havana

Puerto RicoHouston

Dallas

It’s still daylight

in California

Thunder Bay

Port-au-Prince

NIGHT IS FALLING ON EARTH.

Look at Paris and Barcelona, the lights are already lit, meanwhile in London, Lisbon and

Madrid the sun is still visible.

Looking south, we can see the islands in the middle of the ocean.

We have a perfect view of the British Islands, Iceland and Canada.

France

Spain

AFRICA

Italy

EnglandIceland

Atlantic

Ocean