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  2. Travelling salesman problem - Wikipedia

    en.wikipedia.org/wiki/Travelling_salesman_problem

    When the cities are viewed as points in the plane, many natural distance functions are metrics, and so many natural instances of TSP satisfy this constraint. The following are some examples of metric TSPs for various metrics. In the Euclidean TSP (see below), the distance between two cities is the Euclidean distance between the corresponding ...

  3. Geographical distance - Wikipedia

    en.wikipedia.org/wiki/Geographical_distance

    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 ...

  4. Walking distance measure - Wikipedia

    en.wikipedia.org/wiki/Walking_distance_measure

    In Japan, the standard measure for walking distance is 80 meters for 1 minute of walking time. It is the standard used in real estate listings. It is the standard used in real estate listings. For example, if a building is a 10-minute walk from a particular park or train station, it is 800 meters away.

  5. Isochrone map - Wikipedia

    en.wikipedia.org/wiki/Isochrone_map

    GraphHopper [33] can be used to calculate a detailed time information for every point within a certain time or distance reach. GRASS v.net.iso module [34] instaGIS [35] Iso4App – Public Transport Isochrone maps (Isochrones based on GTFS data) [36] Mapbox Isochrone API [37] (interactive Mapbox example [38]) Mapumental

  6. Mileage sign - Wikipedia

    en.wikipedia.org/wiki/Mileage_sign

    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 ...

  7. Flight length - Wikipedia

    en.wikipedia.org/wiki/Flight_length

    The shortest distance between two geographical points is the great-circle distance. In the example ... Flight-time and -distance calculator; Air Miles Calculator;

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    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  9. Naismith's rule - Wikipedia

    en.wikipedia.org/wiki/Naismith's_rule

    Alternatively, the rule can be used to determine the equivalent flat distance of a route. This is achieved by recognising that Naismith's rule implies an equivalence between distance and climb in time terms: 3 miles (=15,840 feet) of distance is equivalent in time terms to 2000 feet of climb.

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