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lat long radius calculation between two points

Lucky Lapwing answered on June 26, 2023 Popularity 3/10 Helpfulness 8/10

answer lat long radius calculation between two points

lat long radius calculation between two points

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// Haversine
// formula:	a = sin²(Δφ/2) + cos φ1 ⋅ cos φ2 ⋅ sin²(Δλ/2)
// c = 2 ⋅ atan2( √a, √(1−a) )
// d = R ⋅ c
// where	φ is latitude, λ is longitude, R is earth’s radius (mean radius = 6,371km);
// note that angles need to be in radians to pass to trig functions!
//
// Javascript code

const R = 6371e3; // metres
const φ1 = lat1 * Math.PI/180; // φ, λ in radians
const φ2 = lat2 * Math.PI/180;
const Δφ = (lat2-lat1) * Math.PI/180;
const Δλ = (lon2-lon1) * Math.PI/180;

const a = Math.sin(Δφ/2) * Math.sin(Δφ/2) +
          Math.cos(φ1) * Math.cos(φ2) *
          Math.sin(Δλ/2) * Math.sin(Δλ/2);
const c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a));

const d = R * c; // in metres

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Source: www.movable-type.co.uk

Tags: between calculation points radius whatever

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Contributed on Jun 26 2023

Lucky Lapwing

0 Answers Avg Quality 2/10

lat long radius calculation between two points

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