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Geographic Information System (GIS)
A computing program that stores geographic data and produces maps to show the data.
International Date Line
An imaginary line on the surface of the earth following (approximately) the 180th meridian. 180 longitude.
Displays the world with slight distortions on all four properties. Projection that attempts to balance several possible projection errors. It does not maintain completely accurate area, shape, distance, or direction, but it minimizes errors in each.
Projects the shapes accurately but distorts the size. Examples include Greenland which is the size of Africa.
A cylindrical map projection that attempts to retain the accurate sizes of the world's landmasses.
Choropleth Thematic Map
Shows a pattern of some variable, such as population density by using a variety of colors and shading.
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