The document discusses the history and development of latitude, longitude, and timekeeping systems. It explains that latitude and longitude were developed in the Middle Ages to create a global grid system for location. It then provides details on latitude and longitude lines and degrees, and how they are used to precisely locate places on Earth. The document also outlines the development of standardized time zones to facilitate global communication and travel, and covers the establishment of the Prime Meridian, International Date Line, and daylight saving time.

1. Location and Time

2. Latitude and Longitude The latitude and longitude system was developed in the middle ages. Ptolemy also used a grid system in ancient Greece. Latitude lines run horizontally and are also known as parallels. Longitude lines, also known as meridians, run vertically.

3. a) Latitude (Parallels) b) Longitude (Meridians) The Geographic Grid

5. The Equator: 0° N/S

8. International Date Line 180° E/W

17. Time http://www.flickr.com/photos/mundoo/1317714345

20. International Date Line Ferdinand Magellan and crew in 1519 set out on their westward journey from Spain to circumnavigate the Earth. Upon their return three years later, they discovered that their meticulously kept logs were off by one day. This was one of the first recorded experience with changing global time. This earlier experience would ultimately lead to the establishment of the international date line. The International Date Line lies directly opposite of the prime meridian and having a longitude of 180°. Crossing the line when traveling east one turns their calendar back a full day. Traveling west one moves their calendar forward one day. http://www.danstopicals.com/dateline.htm

23. US Time Zones This map does NOT include Alaskan or Hawaiian time zones. Atlantic Standard Time and Newfoundland are NOT in the US, they are Canadian.