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Latitude and longitude

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  • 1. 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. Lat/Long are the 2 grid points by which you can locate any point on earth. Y X
  • 2. East West, North South on the Earth Let each of the four quarters then be designated by North or South and East or West. N S EW
  • 3. 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)
  • 4. East West, North South on the Earth That means all points in North America 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
  • 5. 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!
  • 6. What is Latitude? Latitude is the distance from the equator along the Y axis. 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. Y X 90°S 90°N
  • 7. What is Latitude? Each degree of latitude is divided into 60 minutes. Each minute is divided into 60 seconds. Y X 90°S 90°N This is also true of longitude.
  • 8. What is Latitude? For Example: 37°, 02’,51’’N This is close to the latitude where you live. Y X 90°S 90°N
  • 9. 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
  • 10. 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
  • 11. What is Latitude? Our latitude and longitude might be: 37°, 03’,13’’N 76°, 29’, 45’’W Y X 90°S 90°N
  • 12. So Where is (0,0)? The origin point (0,0) is where the equator intersects the prime meridian. (0,0) is off the western coast of Africa in the Atlantic Ocean.
  • 13. See If You Can Tell In Which Quarter These Lon/Lats Are Located 1. 41°N, 21°E 2. 37°N, 76°W 3. 72°S, 141°W 4. 7°S, 23°W 5. 15°N, 29°E 6. 34°S, 151°E A B C D
  • 14. 1. B 2. A 3. C 4. C 5. B 6. D
  • 15. See if you can find those same latitude/longitude locations on a map!
  • 16. Equator Latitude 0o Latitude: (90o N to 90o S) Latitude 23½o NorthTropic of Cancer Latitude 23½o SouthTropic of Capricorn Longitude 30o East Longitude 60o East Longitude 30o West Longitude 60o West Positioning on the Earth’s Surface East is the direction of rotation of the Earth North Pole South Pole 23½o 23½o 66½o90o 900 21st June 22nd December 22nd Sept 20th March 30o E60o E90o E90o W30o W60o W Longitude 90o East Longitude 90o West Prime Meridian 0o Longitude Longitude: (180o E to 180o W) Latitude and Longitude together enable the fixing of position on the Earth’s surface.
  • 17. Now you’re ready to find some locations on a map!