Converting Degree, Minutes, Seconds (DMS) to decimal in PHP

Question

Currently, I'm learning to use Google Maps API. From what I read, the API require the latitude and longitude in Decimal Degree (DD).

In my database, the data is stored as DMS.

Example, 110° 29' 01.1"

I would to ask if you guys have any DMS to DD in php. And, the converter must accept from a single string like the example above.

Regards

Answer 1

You can try if this is working for you.

<?php

function DMStoDD($deg,$min,$sec)
{

    // Converting DMS ( Degrees / minutes / seconds ) to decimal format
    return $deg+((($min*60)+($sec))/3600);
}    

function DDtoDMS($dec)
{
    // Converts decimal format to DMS ( Degrees / minutes / seconds ) 
    $vars = explode(".",$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);
}    

?>

Answer 2

Here's one where you pass in the latitude,longitude in DMS values and returns the converted DMS string. Easy and simnple

function DECtoDMS($latitude, $longitude)
{
    $latitudeDirection = $latitude < 0 ? 'S': 'N';
    $longitudeDirection = $longitude < 0 ? 'W': 'E';

    $latitudeNotation = $latitude < 0 ? '-': '';
    $longitudeNotation = $longitude < 0 ? '-': '';

    $latitudeInDegrees = floor(abs($latitude));
    $longitudeInDegrees = floor(abs($longitude));

    $latitudeDecimal = abs($latitude)-$latitudeInDegrees;
    $longitudeDecimal = abs($longitude)-$longitudeInDegrees;

    $_precision = 3;
    $latitudeMinutes = round($latitudeDecimal*60,$_precision);
    $longitudeMinutes = round($longitudeDecimal*60,$_precision);

    return sprintf('%s%s° %s %s %s%s° %s %s',
        $latitudeNotation,
        $latitudeInDegrees,
        $latitudeMinutes,
        $latitudeDirection,
        $longitudeNotation,
        $longitudeInDegrees,
        $longitudeMinutes,
        $longitudeDirection
    );

}