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How to get longitude and latitude using code

I will be asked to find the longitude and latitude of a specific location. The user will provide the address of the location. How can I get longitude and latitude? Any suggestions are greatly appreciated.

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You will need to do something called geocoding to translate the text of the address into a lat / lon coordinate pair. Typically, good services for this have some sort of quota or paid subscription model, but you can find a free API at:

http://www.programmableweb.com/news/7-free-geocoding-apis-google-bing-yahoo-and-mapquest/2012/06/21



Further work by Google on your part will find other providers as I put in the key term: geocoding. Many of them have Javascript, PHP, C # and other implementation examples to help you get started.

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I am using google api to get geo-coordinates from an address in my project:

class Google
{
    private function __construct() { }

    public static function getGoogleJson($address)
    {
        $apiLink = 'http://maps.google.com/maps/api/geocode/json?sensor=false&language=ru&address=' . urlencode($address);

        $tmp = @json_decode(file_get_contents($apiLink));

        if (!$tmp) {
            return new stdClass;
        } else {
            return $tmp;
        }
    }

    public static function getGeoByAddress($address)
    {
        $addr = self::getGoogleJson($address);

        if (isset($addr->results[0]->geometry->location)) {
            return (array)$addr->results[0]->geometry->location;
        } else {
            return ['lat' => 0, 'lng' => 0];
        }
    }
}


(ACHTUNG! Google has some limit for using this api per day)

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