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Create function to retrieve the enclosed area from a KML file

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Korina Cordero 2019-03-05 03:28:51 -05:00
parent 87a8770bb4
commit 84eb00f9e5
1 changed files with 70 additions and 0 deletions
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src/Service/KMLFileImporter.php Normal file
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<?php
namespace App\Service;
use App\Entity\SupportedArea;
use Symfony\Component\HttpFoundation\File\UploadedFile;
use CrEOF\Spatial\PHP\Types\Geometry\Polygon;
use CrEOF\Spatial\PHP\Types\Geometry\Point;
use CrEOF\Spatial\PHP\Types\Geometry\LineString;
class KMLFileImporter
{
public function __construct()
{
$this->supported_area = new SupportedArea();
}
public function getMapData(UploadedFile $file)
{
$coordinate_array = array();
$point_array = array();
$reader = new XMLReader();
$reader->open($file);
while($reader->read())
{
if ($reader->nodeType == XMLReader::ELEMENT && $reader->name == "Placemark")
{
while($reader->read())
{
if ($reader->nodeType == XMLReader::ELEMENT && $reader->name == "name")
{
$placemark_name = $reader->readInnerXML();
echo $placemark_name."\n";
$supported_area->setName($placemark_name);
}
if ($reader->nodeType == XMLReader::ELEMENT && $reader->name == "coordinates")
{
$coordinates = $reader->readInnerXML();
// clean and parse the coordinates data from KML
$coordinates = preg_replace('/\s\s+/', ',', $coordinates);
$parsed_coordinates = explode(',', $coordinates);
for ($x = 0; $x < sizeof($parsed_coordinates); $x++)
{
if (($x%3 != 0) && ($parsed_coordinates[$x] != ""))
{
$coordinate_array[] = $parsed_coordinates[$x];
}
}
// create an array of Points for the Polygon constructor
$i = 0;
while($i < sizeof($coordinate_array))
{
$point_array[] = new Point($coordinate_array[$i], $coordinate_array[$++i]);
$i++;
}
$area = new Polygon(array(new LineString($point_array)));
$supported_area->setSupportedArea($area);
}
}
break;
}
}
$reader->close();
}
}