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  2. Drive Time Estimates: Google Maps / Mapquest - Road Trips ...

    www.tripadvisor.com/ShowTopic-g1-i12567-k8102687...

    9 years ago. I am mapping out a massive USA Road Trip and had my route drive times on the website: roadtrippers.com. A couple times seems 'long' to me so I went to google maps & all times were significantly shorter (yippee!). Went to mapquest.com & times were similar to Google Maps BU each leg of trip was 15-30 minutes longer on mapquest.

  3. Great-circle distance - Wikipedia

    en.wikipedia.org/wiki/Great-circle_distance

    The great-circle distance, orthodromic distance, or spherical distance is the distance between two points on a sphere, measured along the great-circle arc between them. This arc is the shortest path between the two points on the surface of the sphere. (By comparison, the shortest path passing through the sphere's interior is the chord between ...

  4. How accurate is Google Maps? - New Zealand Forum - Tripadvisor

    www.tripadvisor.com/ShowTopic-g255104-i125-k...

    The shortest route given by Goggle is 391 km @ 5h3m Ave.77km/hr. Something is amiss as that route has far less "urban" km @ less than. 100 kph limits. The distance is 14km less than the "fastest" and. compares well with the odemeter and yet time is 8 minutes longer.

  5. Haversine formula - Wikipedia

    en.wikipedia.org/wiki/Haversine_formula

    Δ λ = λ 2 − λ 1 {\displaystyle \Delta \lambda =\lambda _ {2}-\lambda _ {1}} . Finally, the haversine function hav (θ), applied above to both the central angle θ and the differences in latitude and longitude, is. The haversine function computes half a versine of the angle θ, or the squares of half chord of the angle on a unit circle ...

  6. Google Maps Travel Times - Road Trips Forum - Tripadvisor

    www.tripadvisor.com/ShowTopic-g1-i12567-k6199679...

    1. Re: Google Maps Travel Times. Google Maps uses the speed limits along the route in its time calculations, so that doesn't account for stops for fuel, food, rest breaks, or for delays for weather, traffic, or construction. You can estimate delay time based on your own travel style, and recalculate accordingly.

  7. Great-circle navigation - Wikipedia

    en.wikipedia.org/wiki/Great-circle_navigation

    Great-circle navigation. Great-circle navigation or orthodromic navigation (related to orthodromic course; from Ancient Greek ορθός (orthós) 'right angle' and δρόμος (drómos) 'path') is the practice of navigating a vessel (a ship or aircraft) along a great circle. Such routes yield the shortest distance between two points on the globe.

  8. Accuracy of Google maps - Road Trips Forum - Tripadvisor

    www.tripadvisor.com/ShowTopic-g1-i12567-k8095005...

    Re: Accuracy of Google maps. I can't speak definitively, but on the routes with which I have some familiarity, I'd say Google is generally pretty close. Of course urban traffic can be a BIG variable, as can road construction etc., but I think it's reliable enough. 2.

  9. Maidenhead Locator System - Wikipedia

    en.wikipedia.org/wiki/Maidenhead_Locator_System

    The Maidenhead Locator System (a.k.a. QTH Locator and IARU Locator) is a geocode system used by amateur radio operators to succinctly describe their geographic coordinates, which replaced the deprecated QRA locator, which was limited to European contacts. [ 1] Its purpose is to be concise, accurate, and robust in the face of interference and ...