Encyclopedia of Geography Terms, Themes, and Concepts
knowledge is vital. For instance, the changing angle of the sun in the sky is respon- sible for seasons and is dictated by latit ...
than 24 hours in the summer and be below the horizon for 24 hours or more in the winter. Lines of longitude are also known as me ...
knowledge of time of year and solar declination. This device was limited to use on days without overcast and was difficult to em ...
governing the seas, although few treaties were actually formalized, and the gener- ally accepted limit of a three- to four-mile ...
Exclusive Economic Zone, or EEZ. In general, the EEZ represents a zone extending 200 nautical miles from a coastal baseline and ...
Lingua Franca A lingua franca is a language that is used as a common medium of communication between two or more unrelated group ...
century has made English into the most widely used lingua franca in history, a trend accelerated by expansion of the Internet an ...
Bantu tongues. Thus linguistic geography articulates both contemporary language patterns and those of the past in many instances ...
declinesover successive generations to use the native tongue, due to a perceived lower social standing of that language. Knowled ...
this happens, the languages in question incorporate not only vocabulary from neigh- boring language regions, but over time may a ...
system of reference coordinates, typically based on a grid covering theEarth’s surface—a commonly used grid would be that oflati ...
attention on the part of economic geographers. Two pioneering theorists in this area were Walter Christaller, who is credited wi ...
the work of theorists working in both urban and economic geography in the first decades of the 20th century may be taken as prec ...
M Malthusian Theory A theory ofpopulationgrowth and its consequences, first articulated by Thomas Malthus in 1798. Malthus is ge ...
isoftenreferredtoasaMalthusian catastrophe, an episode that then triggers a return to equilibrium and the beginning of the cycle ...
A century after Malthus lived, another British economist, John Maynard Keynes, based much of the theory ofKeynesian economics, a ...
food shortages that would result in the deaths of “hundreds of millions” of people in the ensuing decades. Many of these deaths ...
the larger the area mapped, the smaller the scale ratio. The map legend provides information on the spatial pattern of the data ...
illustrate the spatial characteristics of a single characteristic or those of a closely related set of phenomena. The purpose of ...
display and compare any number of spatial attributes, producing an array of the- matic maps. Technology has also increased the d ...
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