Oihana PHP

haversine.php

Table of Contents

Functions

haversine()  : float
Calculate the great-circle distance between two points on a sphere using the Haversine formula.

Functions

haversine()

Calculate the great-circle distance between two points on a sphere using the Haversine formula.

haversine(float $latitude1, float $longitude1, float $latitude2, float $longitude2[, float $radius = 6371000 ][, int|null $precision = null ]) : float

This is commonly used for distances on Earth. It's faster than the Vincenty formula but less precise.

Parameters
$latitude1 : float

The latitude of the first point in degrees.

$longitude1 : float

The longitude of the first point in degrees.

$latitude2 : float

The latitude of the second point in degrees.

$longitude2 : float

The longitude of the second point in degrees.

$radius : float = 6371000

The radius of the sphere (default is Earth's mean radius: 6,371,000 meters).

$precision : int|null = null

Number of decimal places to round to. If null, returns full precision.

Tags
example 
use function oihana\core\maths\haversine;

$pos1 = [ 37.422045, -122.084347 ] ; // Google HQ
$pos2 = [ 37.77493,  -122.419416 ] ; // San Francisco, CA

echo haversine( $pos1[0] , $pos1[1], $pos2[0] , $pos2[1] ) ;       // Full precision
echo haversine( $pos1[0] , $pos1[1], $pos2[0] , $pos2[1] , 6371000, 3 ); // Rounded to 3 decimals
author

Marc Alcaraz (ekameleon)

since
1.0.0
Return values
float —

The distance between the two points in meters.


        

        
    




    

    

                                

                

                            
    

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