CODEWITHSUNDEEP
phpgoogle-mapscoordinate-systems
Ali
Ali

Reputation: 7483

How do I convert these coordinates to google map readable coordinates?

I need to convert coordinates in the following form:

N42-53.9° 
W072-16.2°

Into something that is like the following:

-90.7311
0.346944

A php function would be greatly appreciated - or just a formula would also be nice enough.

Upvotes: 3

Views: 1444

Answers (2)

bootware
bootware

Reputation: 72

Do it with simple mathematics:

arcsecond is 1⁄3,600 of a degree
arcminute is 1/60 of a degree

S,E negative, N,W positive

example: S 23° 25' 33.8: -1 * 23+25/60+33.8/3600 = -23,426055555555555555555555555556°

Upvotes: 0

Michael Haren
Michael Haren

Reputation: 108246

I found an online JS calculator and a PHP solution:

<?php
function DMStoDEC($deg,$min,$sec)
{
// Converts DMS ( Degrees / minutes / seconds ) 
// to decimal format longitude / latitude

    return $deg+((($min*60)+($sec))/3600);
}    

function DECtoDMS($dec)
{
// Converts decimal longitude / latitude to DMS
// ( Degrees / minutes / seconds ) 

// This is the piece of code which may appear to 
// be inefficient, but to avoid issues with floating
// point math we extract the integer part and the float
// part by using a string function.

    $vars = explode(".",$dec);
    $deg = $vars[0];
    $tempma = "0.".$vars[1];

    $tempma = $tempma * 3600;
    $min = floor($tempma / 60);
    $sec = $tempma - ($min*60);

    return array("deg"=>$deg,"min"=>$min,"sec"=>$sec);
}    
?>

Upvotes: 2

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