International Date Line
an imaginary line on the surface of the earth following (approximately) the 180th meridian
The numbering system used to indicate the location of meridians drawn on a globe and measuring distance east and west of the prime meridian (0°). Run North and South
The meridian, designated at 0° longitude, which passes through the Royal Observatory at Greenwich, England.
Having an indicated pole (as the distinction between positive and negative electric charges)
Greenwich Mean Time. The time in that time zone encompassing the prime meridian or 0 degree longitude
Geographic Information System, A computer system that stores, organizes, analyzes, and displays geographic data.
A navigational system involving satellites and computers that can determine the latitude and longitude of a receiver on Earth by computing the time difference for signals from different satellites to reach the receiver
Allows geographers to see land use changing over time by comparing pictures of places from years past to current photographs.
A method of collecting data or information through the use of instruments that are physically distant from the area or object of study.
Conformal Map Projections
A projection that maintains proper angular relationships over the entire map; over limited areas shows the correct shapes of features shown on a map.
Equivalent Map Projections
A projection that maintains constant size relationships over the entire map.
March 22 - All locations on Earth experience 12 hours of daylight - The event that the Sun be positioned directly over the Earth's equator
Circle of Illumination
The dividing line between day and night. This circle intersects the equator, which is why daylength at the equator is evenly divided.