class

Class Notes:

1.        The geographic grid is a system of imaginary arcs drawn in a grid pattern on the Earth’s surface.

a.       Meridians are arcs drawn between the North and South Poles.  Each is numbered, according to a system known as longitude.

2.       Values range from 0 (prime meridian) to 180 east or west longitude

3.       Parallels are arcs drawn parallel to the equator and at right angles to meridians.  Each is numbered according to a system known as latitude.

4.       Values range from 0 (equator) to 90 north or south

Parallel=horizontal-latitude

Meridians=vertical-longitude

Prime Meridian in England, starts at 0 longitude

1 degree=60 minutes

1 minute=60 seconds

Tropic of cancer lies at 23.5 N

Tropic of Capricorn lies at 23.5 S