Gis 4

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Lesson for GIS#4 on Purpose Games

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Gis 4

  1. 1. GIS #4
  2. 2. <ul><li>GIS combines three words: </li></ul><ul><li>Geography </li></ul><ul><li>+ </li></ul><ul><li>Information </li></ul><ul><li>+ </li></ul><ul><li>System </li></ul>From GIS in Schools by Richard Audet and Gail Ludwig - Page 6
  3. 3. Geography <ul><li>Geography is the science that relates to all the features and processes that occur on the surface of the earth. </li></ul>From GIS in Schools by Richard Audet and Gail Ludwig - Page 6
  4. 4. Information <ul><li>Information is the heart of GIS, where vast amounts of data are stored and analyzed. </li></ul>From GIS in Schools by Richard Audet and Gail Ludwig - Page 6
  5. 5. System <ul><li>System is what connects everything - the computer, the data, and the human operator - all working together to ask questions, discover answers, and display them in ways that promote understanding of what it means to live on the earth. </li></ul>From GIS in Schools by Richard Audet and Gail Ludwig - Page 6
  6. 6. GPS combines three words: Global + Position + System
  7. 7. Global <ul><li>Satellites broadcast the signals around the entire world so as long as you are someplace outside without too much cloud cover, your GPS unit should receive signals. </li></ul>
  8. 8. Global Position <ul><li>Location (position) in the world (global) in three dimensions (3-D): </li></ul><ul><li>Latitude Longitude Altitude </li></ul>
  9. 9. Latitude <ul><li>The angle north or south of the equatorial plane </li></ul><ul><li>Parallels – lines of latitude that measure locations in the N-S direction on the geographic coordinate system </li></ul>
  10. 10. Longitude <ul><li>The angle east or west from the prime meridian </li></ul><ul><li>Meridians – lines of longitude that measure locations in the E-W direction on the geographic coordinate system </li></ul>
  11. 11. Altitude <ul><li>The height above sea level on Earth </li></ul>1524 m 2438 m 3505 m 4572 m 5486 m 6069 m 7620 m 9144 m

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