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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 ...
A mileage sign, sometimes also called a route confirmation sign or simply a distance sign in certain contexts, is a type of road sign along highways that displays the distance from the current point on a highway to a certain city, destination, or a junction to another highway. Their purpose is to inform drivers of the distance to a destination ...
The distance between sets A and B is the infimum of the distances between any two of their respective points: (,) =, (,). This does not define a metric on the set of such subsets: the distance between overlapping sets is zero, and this distance does not satisfy the triangle inequality for any metric space with two or more points (consider the ...
In the U.S. state of South Carolina, U.S. Route 221 (US 221) is a 126.390-mile (203.405 km) United States Highway within the state. It is part of the United States Numbered Highway System that travels from Perry in North Florida to Lynchburg in Central Virginia .
Two sections of the highway can be considered challenging and twisty: 13-mile stretch between Linville and Blowing Rock, and a 21-mile stretch between Jefferson and Twin Oaks. U.S. Route 221 has one Alternate (continuing from South Carolina) and two Business Routes (in Marion and Jefferson).