Longitude - Latitude

[crazyguy30]

Hi,

 

This is my first post. I'm quite new to regex and was wondering if any of you had any ideas for the regex for longitude / latitude?

 

Example: Longitude -    36° 51' S   

            Latitude -      174° 46' E

 

Any help would be appreciated.

Thanks

[aCa]

Could you provide us with some more info? Is your example the text you will check and only want the numbers?

 

If that is the case somthing like this might solve your problem:

 

preg_match_all('/([0-9]+)°\s([0-9]+)'/', $string, $result);

 

[crazyguy30]

Hi,

 

Thanks for the reply. Here is some background information:

 

Latitude:

    * Degrees can be any integer number from 0 to 90

    * Minutes can be any integer number from 0 to 59

    * Seconds can be any integer number from 0 to 59

    * Direction can be either E or W

 

    An example 35°48'35 W

 

Longitude:

    * Degrees can be any integer number from 0 to 180

    * Minutes can be any integer number from 0 to 59

    * Seconds can be any integer number from 0 to 59

    * Direction can be either N or S

 

    An example 175°15'19 S

 

 

It would be helpful if the regex could ensure the separators such as ° and ' were in place.

 

The text i plan to evaluate this against is coming from an input form.

 

Thanks

 

 

[effigy]

<pre>
<?php

$lat_pattern = '/
	\A
	(90|[1-8]\d|\d)
	\xBA
	(5\d|[1-4]\d|\d)
	\'
	(5\d|[1-4]\d|\d)
	\s*
	[EW]
	\z
/x';

$long_pattern = '/
	\A
	(180|1[0-7]\d|\d\d?)
	\xBA
	(5\d|[1-4]\d|\d)
	\'
	(5\d|[1-4]\d|\d)
	\s*
	[NS]
	\z
/x';

### Generate test data.
$degree = pack('C*', 0xBA);
$dirs = array('N', 'S', 'E', 'W');
for ($i = 0; $i < 1000; $i++) {
	$deg = rand(0, 200);
	$min = rand(0, 100);
	$sec = rand(0, 100);
	$dir = $dirs[rand(0, 3)];
	$tests[] = "$deg$degree$min'$sec$dir";
}

echo '<table border="1">';
echo '<tr><th>Value</th><th>Latitude</th><th>Longitude</th></tr>';
foreach ($tests as $test) {
	echo "<tr><td>$test</td>",
		'<td>',
		(preg_match($lat_pattern, $test) ? 'Y' : 'N'),
		'</td><td>',
		(preg_match($long_pattern, $test) ? 'Y' : 'N'),
		'</td></tr>';
}
echo '</table>';

?>
</pre>

[crazyguy30]

Thanks so much that works perfect. I can't wait to learn the finer details of regex.

 

Thanks