1. Longitude
& Latitude
Grid Maps

2. Global Address Everywhere on earth has a global address!
A global address is written using two numbers called COORDINATES!

3. Grid Mapping
Instead of a political map, global addresses are shown on a GRID MAP –
horizontal and vertical lines on a map.

4. The International Date Line (North/South)
The Equator
(East/West)
The Prime Meridian
(North/South)
The International Date Line (North/South)

5. Latitude Latitude lines run EAST to WEST!
Latitude lines are horizontal.
Latitude lines are parallel to the Equator.
The highest latitude possible is 90 ° (the poles)

6. Longitude Longitude lines run NORTH to SOUTH!
Longitude lines are vertical lines!
Longitude lines are parallel to the prime meridian!
The highest longitude possible is 180 ° (The international date line)

7. How to Write a Global Address
42° N, 88° W
Latitude is listed first
Longitude is listed last