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The scale of a map is the ratio of a distance on the map to the corresponding distance on the ground. This simple concept is complicated by the curvature of the Earth 's surface, which forces scale to vary across a map. Because of this variation, the concept of scale becomes meaningful in two distinct ways.
Mercator 1569 world map (Nova et Aucta Orbis Terrae Descriptio ad Usum Navigantium Emendate Accommodata) showing latitudes 66°S to 80°N. The Mercator projection (/ m Ér Ë k eÉŞ t Ér /) is a conformal cylindrical map projection presented by Flemish geographer and cartographer Gerardus Mercator in 1569.
Route number. A route (or road) number, designation or abbreviation is an identifying numeric (or alphanumeric) designation assigned by a highway authority to a particular stretch of roadway to distinguish it from other routes and, in many cases, also to indicate its classification (e.g. motorway, primary route, regional road, etc.), general ...
Surviving fragment of the Piri Reis map The Piri Reis map is a world map compiled in 1513 by the Ottoman admiral and cartographer Piri Reis. Approximately one third of the map survives, housed in the TopkapÄą Palace in Istanbul. When rediscovered in 1929, the remaining fragment garnered international attention as it includes a partial copy of an otherwise lost map by Christopher Columbus. The ...
A choropleth map (from Ancient Greek ĎáżśĎÎżĎ (khĂ´ros) 'area, region', and ĎÎťáżÎ¸ÎżĎ (plĂŞthos) 'multitude') is a type of statistical thematic map that uses pseudocolor, meaning color corresponding with an aggregate summary of a geographic characteristic within spatial enumeration units, such as population density or per-capita income.
World map. A world map is a map of most or all of the surface of Earth. World maps, because of their scale, must deal with the problem of projection. Maps rendered in two dimensions by necessity distort the display of the three-dimensional surface of the Earth.
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