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Swap Longitude and Latitude in a string


jakebur01
Go to solution Solved by cyberRobot,

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I have a string I am pulling out of a kml file to be used in google's static map image.  The problem is that the longitude and latitude are in the wrong order.

$xml=simplexml_load_file($kml);
//print_r($xml);
$coordinates= $xml->Document->Placemark->Polygon->outerBoundaryIs->LinearRing->coordinates;
$coordinates = str_replace(",0","|",$coordinates);
echo $coordinates;

$coordinates returns

 

-93.93740385636626,32.5298698657008| -93.94147866742821,32.52989552832681| -93.94144945527509,32.53330102162547| -93.94975589137293,32.53335196474311| -93.94983123242544,32.52989370087431| -93.94493319136991,32.52989645540433| -93.9443121915328,32.52861950574362| -93.94419758821717,32.52736388060429| -93.94302907878635,32.52652644904565| -93.94229993303671,32.5257441308524| -93.94147580320451,32.52521094897828| -93.94137978713827,32.52261795379491| -93.93742258613195,32.5225916055261| -93.93740385636626,32.5298698657008|

 

I need them as they are above separated by pipes to be used as a parameter in a url only I need the longitude and latitude swapped.

 

So instead of "-93.93740385636626,32.5298698657008", I need it to read "32.5298698657008,-93.93740385636626".  All of the coordinates I will be using in the future will be in the same general area as the locations above.

 

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  • Solution

Here's a quick script for swapping the values:

<?php
//INITIALIZE VARIABLES
$values          = "-93.93740385636626,32.5298698657008| -93.94147866742821,32.52989552832681| -93.94144945527509,32.53330102162547| -93.94975589137293,32.53335196474311| -93.94983123242544,32.52989370087431| -93.94493319136991,32.52989645540433| -93.9443121915328,32.52861950574362| -93.94419758821717,32.52736388060429| -93.94302907878635,32.52652644904565| -93.94229993303671,32.5257441308524| -93.94147580320451,32.52521094897828| -93.94137978713827,32.52261795379491| -93.93742258613195,32.5225916055261| -93.93740385636626,32.5298698657008|";
$coords          = explode('|', $values);
$correctedCoords = array();
 
//LOOP THROUGH THE COORDINATES
foreach($coords as $currLatLong) {
     //IF THE CURRENT ENTRY CONTAINS A VALUE, SWAP THE VALUES
     $currLatLong = trim($currLatLong);
     if($currLatLong != '') {
          list($val1, $val2) = explode(',', $currLatLong);
          $correctedCoords[] = "$val2,$val1";
     }
}
 
//RE-BUILD THE STRING
$correctedCoords = implode('| ', $correctedCoords);
 
//OUTPUT RESULTS
print '<pre>' . print_r($values, true) . '</pre>';
print '<pre>' . print_r($correctedCoords, true) . '</pre>';
?>
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