GPX to GeoJson converter

2019-02-12 20:00:59 +01:00
parent b49445a85e
commit 50878503e5
9 changed files with 236739 additions and 189 deletions
--- a/inc/converter.php
+++ b/inc/converter.php
@@ -0,0 +1,130 @@
+<?php
+
+class Converter extends PhpObject {
+	
+	const GPX_EXT = '.gpx';
+	const GEO_EXT = '.geojson';
+	
+	/**
+	 * Project to convert
+	 * @var Project
+	 */
+	private $oProject;
+	
+	public function __construct(&$oProject) {
+		parent::__construct(__CLASS__, Settings::DEBUG);
+		$this->oProject = &$oProject;
+	}
+	
+	public function convertToGeoJson() {
+		$sFileName = pathinfo($this->oProject->getGeoFile(), PATHINFO_FILENAME);
+		$sGpxFileName = $sFileName.self::GPX_EXT;
+		$sGeoJsonFileName = $sFileName.self::GEO_EXT;
+		
+		$oGpx = new Gpx($sGpxFileName);
+		$oGeoJson = new GeoJson($sGeoJsonFileName);
+		
+		$oGeoJson->setTracks($oGpx->getTracks());
+		$oGeoJson->saveFile();
+	}
+	
+}
+
+class Geo extends PhpObject {
+	
+	const GEO_FOLDER = 'geo/';
+	
+	protected $asTracks;
+	protected $sFilePath;
+	
+	public function __construct($sFileName) {
+		parent::__construct(__CLASS__, Settings::DEBUG);
+		$this->sFilePath = self::GEO_FOLDER.$sFileName;
+		$this->asTracks = array();
+	}
+}
+
+class Gpx extends Geo {
+
+	public function __construct($sFileName) {
+		parent::__construct($sFileName);
+		$this->parseFile();
+	}
+	
+	public function getTracks() {
+		return $this->asTracks;
+	}
+	
+	private function parseFile() {
+		$oXml = simplexml_load_file($this->sFilePath);
+		foreach($oXml->trk as $aoTrack) {
+			$asTrack = array(
+				'name'	=> (string) $aoTrack->name,
+				'desc'	=> str_replace("\n", '', ToolBox::fixEOL((strip_tags($aoTrack->desc)))),
+				'color'	=> (string) $aoTrack->extensions->children('gpxx', true)->TrackExtension->DisplayColor,
+				'points'=> array()
+			);
+			
+			foreach($aoTrack->trkseg as $asSegment) {
+				foreach($asSegment as $asPoint) {
+					$asTrack['points'][] = array(
+						'lon' => (float) $asPoint['lon'],
+						'lat' => (float) $asPoint['lat'],
+						//'ele' => (int) $asPoint->ele
+					);
+				}
+			}
+			$this->asTracks[] = $asTrack;
+		}
+	}
+}
+
+class GeoJson extends Geo {
+	
+	public function __construct($sFileName) {
+		parent::__construct($sFileName);
+	}
+	
+	public function setTracks($asTracks) {
+		$this->asTracks = $asTracks;
+	}
+	
+	public function saveFile() {
+		$sContent = json_encode($this->getGeoJson());
+		//$sContent = str_replace('{"type":"Feature"', "\n\t{\"type\":\"Feature\"", $sContent);
+		file_put_contents($this->sFilePath, $sContent);
+	}
+		
+	private function getGeoJson() {
+		$asTracks = array();
+		foreach($this->asTracks as $asTrackProps) {
+			
+			switch($asTrackProps['color']) {
+				case 'LightGray':	continue 2;
+				case 'Magenta':		$sType = 'off-track'; break;
+				case 'Red':			$sType = 'hitchhiking'; break;
+				default: 			$sType = 'main'; break;
+			}
+			
+			$asTrack = array(
+				'type'	=> 'Feature',
+				'properties' => array(
+					'name'			=> $asTrackProps['name'],
+					'type'			=> $sType,
+					'description'	=> $asTrackProps['desc']
+				),
+				'geometry'		=> array(
+					'type'			=> 'MultiLineString',
+					'coordinates'	=> array()
+				)
+			);
+			
+			foreach($asTrackProps['points'] as $asPoint) {
+				$asTrack['geometry']['coordinates'][0][] = array_values($asPoint);
+			}
+			$asTracks[] = $asTrack;
+		}
+		
+		return $asTracks;
+	}
+}