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- 1. Latitude and Longitude
- 2. Latitude and Longitude <ul><li>Lines of Latitude and Longitude are imaginary lines that encircle the Earth in either an East- West direction or in a North-South direction </li></ul><ul><li>Together they form a grid which can be used to identify locations on the Earth’s surface </li></ul>
- 3. Latitude and Longitude <ul><li>When using these lines to find a location the coordinates are always given latitude first and then longitude </li></ul>
- 4. Latitude
- 5. Latitude <ul><li>Latitude is the name for a group of imaginary lines that run parallel to the Equator </li></ul><ul><li>The Equator is the 0 degree line and splits the earth into two equal halves –northern and southern hemispheres </li></ul><ul><li>Each hemisphere is divided into 90 degrees, from the Equator to the Pole </li></ul>
- 6. Latitude <ul><li>When finding a point in the Northern hemisphere the latitude is given as (x) degrees N </li></ul><ul><li>For a point in the Southern hemisphere the coordinates would be (x) degrees S </li></ul>
- 7. Latitude <ul><li>Lines of latitude get smaller as they get further north because the distance around the Earth decreases </li></ul><ul><li>At the Poles the latitude is 90 degrees and the circular distance is 0km, each Pole being just a single point </li></ul>
- 8. Latitude <ul><li>There are several major lines of Latitude other than the Equator and the Poles </li></ul><ul><li>They are the Tropic of Cancer, the Tropic of Capricorn, the Arctic Circle and the Antarctic Circle </li></ul>
- 9. Longitude
- 10. Longitude <ul><li>Lines of longitude run north-south around the planet </li></ul><ul><li>They begin at the Prime Meridian and split the Earth into East and West hemispheres </li></ul><ul><li>There are 180 degrees in each hemisphere </li></ul>
- 11. Longitude <ul><li>When locating a point in the Eastern hemisphere the longitude is given as (x) degrees E </li></ul><ul><li>For a point in the Western hemisphere the longitude would be (x) degrees W </li></ul>
- 12. Longitude <ul><li>All lines of longitude are the same length </li></ul><ul><li>There is only one important line of Longitude other than the Prime Meridian – the International Date Line </li></ul><ul><li>This is the 180 degree line in both directions </li></ul>
- 13. Latitude and Longitude Finding Locations Finding Locations <ul><li>To use latitude and longitude to find a location you simply follow the lines until they meet at the point you are looking for </li></ul>
- 14. Latitude and Longitude Finding Locations Finding Locations <ul><li>The latitude is always the first coordinate given </li></ul><ul><li>It will be a number between 0 and 90 degrees and will be followed by either an N or an S, depending on which hemisphere the location is in </li></ul><ul><li>Longitude is always the second number and will be between 0 and 180 degrees, followed by either an E or a W </li></ul>
- 15. Latitude and Longitude Finding Locations Finding Locations <ul><li>Not all points are located neatly at the points where the lines intersect </li></ul><ul><li>To find locations between the points each degree is split into 60 smaller sections called minutes </li></ul><ul><li>For example, the coordinates for Orono are 43 59N 78 36W </li></ul>
- 16. Latitude and Longitude Finding Locations Finding Locations <ul><li>The coordinates for Orono mean that the village is located 43 degrees and 59 minutes north of the Equator and 78 degrees and 36 minutes west of the Prime Meridian </li></ul><ul><li>If you are using a GPS device there will be an additional set of numbers for each coordinate, called seconds </li></ul><ul><li>Seconds subdivide the minutes into even smaller sections and provide additional accuracy </li></ul>

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