“Tool Box” Unit Part 2 – Where are you?. Global Grid Use the grid to give your coordinate...
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Transcript of “Tool Box” Unit Part 2 – Where are you?. Global Grid Use the grid to give your coordinate...
“Tool Box” Unit
Part 2 – Where are you?
Global Grid
• Use the grid to give your coordinate address on earth
• Absolute Location vs relative location
This is the Earth
This is the Earth with Grid
Latitude
• Latitude – Lines that circle the earth east to west, and tell you how far you are north or south of the equator
• The Equator is the zero latitude line that divides the earth into north and south
• Also called parallels
Longitude
• Lines that circle the earth north to south and tell you your position east and west.
• Prime Meridian is the zero longitude line that divides the earth into east and west
• Also called meridians
Hermispheres
• Equator divides earth into North and South• Prime Meridian divides earth into East and
West
Prime Meridian
• Runs through England
Globes vs Maps
Different Kinds of Map Projection
• Robinson• Polar / Azmuthal• Goode’s• Mercator• & more……
Robinson• Shape and size are both somewhat distorted but not extremely distorted
Mercator• One of the simplest projections• One of the more distorted• Shapes are more accurate • size is not accurate
Goode’s
Polar - Azimuthal
Problem….
• Distortion!!!!
• (No, Greenland is NOT as large as Africa!
Why?• THE EARTH IS NOT FLAT,
but Maps are!
• This is the answer to a test question…..
IF you could map the round earth….
Great Circle Routes….
• Which route is shorter? Kinda seems to depend on which map you look at…….
Time Zones….
• Related to Longitude• Earth is divided into 24 zones (because
there are 24 hours in the day…..)• Why should you care about time zones?
– Travel – International business
• Do you realize it’s already tomorrow in Japan????
Time Zones