The geographic grid is a system of imaginary arcs drawn in a grid pattern of Earth's surface.
Meridians are arcs drawn between the North and South poles. Each is numbered, according to a system known as longitude.
Values range from 0 (prime meridian) to 180 east or west longitude.
Parallels are arcs drawn parallel to the equator and at right angles to meridians. Each is numbered according to a system known as latitude.
values range from 0 (equator) to 90 north or south
parallels=latitude
circle grid from east to west
latitude = "climbing a ladder"
1 degree= 60 min
tropic of cancer= 23.5 N
tropic of Capricorn = 23.5 S
in between is the tropic
arctic circle= 66.5 N
equator=0
antarctic circle = 66.5 S
meridian= longitude
coverage= at poles
skinny - thick - skinny
prime meridian= 0
in Greenwich, Uk
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