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Geographical distance or geodetic distance is the distance measured along the surface of the Earth, or the shortest arch length. The formulae in this article calculate distances between points which are defined by geographical coordinates in terms of latitude and longitude. This distance is an element in solving the second (inverse) geodetic ...
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Optional. Launched. February 6, 1996; 28 years ago. ( 1996-02-06) Current status. Active. MapQuest (stylized as mapquest) is an American free online web mapping service. It was launched in 1996 as the first commercial web mapping service. [1] MapQuest vies for market share with competitors such as Google Maps and Here.
Rand McNally began publishing educational maps in 1880 with its first line of maps, globes, and geography textbooks, soon followed by a world atlas. The company began publishing general literature in 1884 with its first title, The Secret of Success, and the Textbook department was established in 1894 with The Rand McNally Primary School Geography.
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.
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On a road with distance-based exit numbering, the exit number (shown here on a gore sign) matches a nearby mile or kilometer marker. Puerto Rico is the only place in the United States that uses Spanish like the "Salida 5B" sign. An exit number is a number assigned to a road junction, usually an exit from a freeway.
River mile. Part of in the Allegheny River - the island is named for its distance from the river's mouth in river miles. A river mile is a measure of distance in miles along a river from its mouth. River mile numbers begin at zero and increase further upstream. The corresponding metric unit using kilometers is the river kilometer.
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