Split Gpx management classes

This commit is contained in:
2024-02-27 20:09:58 +01:00
parent 356d8ccd7e
commit 205855acd8
4 changed files with 299 additions and 289 deletions

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@@ -2,8 +2,6 @@
namespace Franzz\Spot;
use Franzz\Objects\PhpObject;
use Franzz\Objects\ToolBox;
use \Settings;
/**
* GPX to GeoJSON Converter
@@ -43,290 +41,4 @@ class Converter extends PhpObject {
if(!file_exists($sGpxFilePath) || file_exists($sGeoJsonFilePath) && filemtime($sGeoJsonFilePath) > filemtime(Gpx::getFilePath($sCodeName))) $bResult = true;
return $bResult;
}
}
class Geo extends PhpObject {
const GEO_FOLDER = '../geo/';
const OPT_SIMPLE = 'simplification';
protected $asTracks;
protected $sFilePath;
public function __construct($sCodeName) {
parent::__construct(get_class($this), Settings::DEBUG, PhpObject::MODE_HTML);
$this->sFilePath = self::getFilePath($sCodeName);
$this->asTracks = array();
}
public static function getFilePath($sCodeName) {
return self::GEO_FOLDER.$sCodeName.static::EXT;
}
public static function getDistFilePath($sCodeName) {
return 'geo/'.$sCodeName.static::EXT;
}
public function getLog() {
return $this->getCleanMessageStack(PhpObject::NOTICE_TAB);
}
}
class Gpx extends Geo {
const EXT = '.gpx';
public function __construct($sCodeName) {
parent::__construct($sCodeName);
$this->parseFile();
}
public function getTracks() {
return $this->asTracks;
}
private function parseFile() {
$this->addNotice('Parsing: '.$this->sFilePath);
if(!file_exists($this->sFilePath)) $this->addError($this->sFilePath.' file missing');
else {
$oXml = simplexml_load_file($this->sFilePath);
//Tracks
$this->addNotice('Converting '.count($oXml->trk).' tracks');
foreach($oXml->trk as $aoTrack) {
$asTrack = array(
'name' => (string) $aoTrack->name,
'desc' => str_replace("\n", '', ToolBox::fixEOL((strip_tags($aoTrack->desc)))),
'cmt' => ToolBox::fixEOL((strip_tags($aoTrack->cmt))),
'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;
}
//Waypoints
$this->addNotice('Ignoring '.count($oXml->wpt).' waypoints');
}
}
}
class GeoJson extends Geo {
const EXT = '.geojson';
const MAX_FILESIZE = 2; //MB
const MAX_DEVIATION_FLAT = 0.1; //10%
const MAX_DEVIATION_ELEV = 0.1; //10%
public function __construct($sCodeName) {
parent::__construct($sCodeName);
}
public function saveFile() {
$this->addNotice('Saving '.$this->sFilePath);
file_put_contents($this->sFilePath, $this->buildGeoJson());
}
public function isSimplicationRequired() {
//Size in bytes
$iFileSize = strlen($this->buildGeoJson());
//Convert to MB
$iFileSize = round($iFileSize / pow(1024, 2), 2);
//Compare with max allowed size
$bFileTooLarge = ($iFileSize > self::MAX_FILESIZE);
if($bFileTooLarge) $this->addNotice('Output file is too large ('.$iFileSize.'MB > '.self::MAX_FILESIZE.'MB)');
return $bFileTooLarge;
}
public function buildTracks($asTracks, $bSimplify=false) {
$this->addNotice('Creating '.($bSimplify?'Simplified ':'').'GeoJson Tracks');
$iGlobalInvalidPointCount = 0;
$iGlobalPointCount = 0;
$this->asTracks = array();
foreach($asTracks as $asTrackProps) {
$asOptions = $this->parseOptions($asTrackProps['cmt']);
//Color mapping
switch($asTrackProps['color']) {
case 'DarkBlue':
$sType = 'main';
break;
case 'Magenta':
if($bSimplify && $asOptions[self::OPT_SIMPLE]!='keep') {
$this->addNotice('Ignoring Track "'.$asTrackProps['name'].' (off-track)');
continue 2; //discard tracks
}
else {
$sType = 'off-track';
break;
}
case 'Red':
$sType = 'hitchhiking';
break;
default:
$this->addNotice('Ignoring Track "'.$asTrackProps['name'].' (unknown color "'.$asTrackProps['color'].'")');
continue 2; //discard tracks
}
$asTrack = array(
'type' => 'Feature',
'properties' => array(
'name' => $asTrackProps['name'],
'type' => $sType,
'description' => $asTrackProps['desc']
),
'geometry' => array(
'type' => 'LineString',
'coordinates' => array()
)
);
//Track points
$asTrackPoints = $asTrackProps['points'];
$iPointCount = count($asTrackPoints);
$iInvalidPointCount = 0;
$asPrevPoint = array();
foreach($asTrackPoints as $iIndex=>$asPoint) {
$asNextPoint = ($iIndex < ($iPointCount - 1))?$asTrackPoints[$iIndex + 1]:array();
if($bSimplify && !empty($asPrevPoint) && !empty($asNextPoint)) {
if(!$this->isPointValid($asPrevPoint, $asPoint, $asNextPoint)) {
$iInvalidPointCount++;
continue;
}
}
$asTrack['geometry']['coordinates'][] = array_values($asPoint);
$asPrevPoint = $asPoint;
}
$this->asTracks[] = $asTrack;
$iGlobalInvalidPointCount += $iInvalidPointCount;
$iGlobalPointCount += $iPointCount;
if($iInvalidPointCount > 0) $this->addNotice('Removing '.$iInvalidPointCount.'/'.$iPointCount.' points ('.round($iInvalidPointCount / $iPointCount * 100, 1).'%) from '.$asTrackProps['name']);
}
if($bSimplify) $this->addNotice('Total: '.$iGlobalInvalidPointCount.'/'.$iGlobalPointCount.' points removed ('.round($iGlobalInvalidPointCount / $iGlobalPointCount * 100, 1).'%)');
}
public function sortOffTracks() {
$this->addNotice('Sorting off-tracks');
//Find first & last track points
$asTracksEnds = array();
$asTracks = array();
foreach($this->asTracks as $iTrackId=>$asTrack) {
$sTrackId = 't'.$iTrackId;
$asTracksEnds[$sTrackId] = array('first'=>reset($asTrack['geometry']['coordinates']), 'last'=>end($asTrack['geometry']['coordinates']));
$asTracks[$sTrackId] = $asTrack;
}
//Find variants close-by tracks
$asClonedTracks = $asTracks;
foreach($asClonedTracks as $sTrackId=>$asTrack) {
if($asTrack['properties']['type'] != 'off-track') continue;
$iMinDistance = INF;
$sConnectedTrackId = 0;
$iPosition = 0;
//Test all track ending points to find the closest
foreach($asTracksEnds as $sTrackEndId=>$asTrackEnds) {
if($sTrackEndId != $sTrackId) {
//Calculate distance between the last point of the track and every starting point of other tracks
$iDistance = self::getDistance($asTracksEnds[$sTrackId]['last'], $asTrackEnds['first']);
if($iDistance < $iMinDistance) {
$sConnectedTrackId = $sTrackEndId;
$iPosition = 0; //Track before the Connected Track
$iMinDistance = $iDistance;
}
//Calculate distance between the first point of the track and every ending point of other tracks
$iDistance = self::getDistance($asTracksEnds[$sTrackId]['first'], $asTrackEnds['last']);
if($iDistance < $iMinDistance) {
$sConnectedTrackId = $sTrackEndId;
$iPosition = +1; //Track after the Connected Track
$iMinDistance = $iDistance;
}
}
}
//Move track
unset($asTracks[$sTrackId]);
$iOffset = array_search($sConnectedTrackId, array_keys($asTracks)) + $iPosition;
$asTracks = array_slice($asTracks, 0, $iOffset) + array($sTrackId => $asTrack) + array_slice($asTracks, $iOffset);
}
$this->asTracks = array_values($asTracks);
}
private function parseOptions($sComment){
$sComment = strip_tags(html_entity_decode($sComment));
$asOptions = array(self::OPT_SIMPLE=>'');
foreach(explode("\n", $sComment) as $sLine) {
$asOptions[mb_strtolower(trim(mb_strstr($sLine, ':', true)))] = mb_strtolower(trim(mb_substr(mb_strstr($sLine, ':'), 1)));
}
return $asOptions;
}
private function isPointValid($asPointA, $asPointO, $asPointB) {
/* A----O Calculate angle AO^OB
* \ If angle is within [90% Pi ; 110% Pi], O can be discarded
* \ O is valid otherwise
* B
*/
//Path Turn Check -> -> -> ->
//Law of Cosines (vector): angle = arccos(OA.OB / ||OA||.||OB||)
$fVectorOA = array('lon'=>($asPointA['lon'] - $asPointO['lon']), 'lat'=> ($asPointA['lat'] - $asPointO['lat']));
$fVectorOB = array('lon'=>($asPointB['lon'] - $asPointO['lon']), 'lat'=> ($asPointB['lat'] - $asPointO['lat']));
$fLengthOA = sqrt(pow($asPointA['lon'] - $asPointO['lon'], 2) + pow($asPointA['lat'] - $asPointO['lat'], 2));
$fLengthOB = sqrt(pow($asPointO['lon'] - $asPointB['lon'], 2) + pow($asPointO['lat'] - $asPointB['lat'], 2));
$fVectorOAxOB = $fVectorOA['lon'] * $fVectorOB['lon'] + $fVectorOA['lat'] * $fVectorOB['lat'];
$fAngleAOB = ($fLengthOA != 0 && $fLengthOB != 0) ? acos($fVectorOAxOB/($fLengthOA * $fLengthOB)) : 0;
//Elevation Check
//Law of Cosines: angle = arccos((OB² + AO² - AB²) / (2*OB*AO))
$fLengthAB = sqrt(pow($asPointB['ele'] - $asPointA['ele'], 2) + pow($fLengthOA + $fLengthOB, 2));
$fLengthAO = sqrt(pow($asPointO['ele'] - $asPointA['ele'], 2) + pow($fLengthOA, 2));
$fLengthOB = sqrt(pow($asPointB['ele'] - $asPointO['ele'], 2) + pow($fLengthOB, 2));
$fAngleAOBElev = ($fLengthOB != 0 && $fLengthAO != 0) ? (acos((pow($fLengthOB, 2) + pow($fLengthAO, 2) - pow($fLengthAB, 2)) / (2 * $fLengthOB * $fLengthAO))) : 0;
return ($fAngleAOB <= (1 - self::MAX_DEVIATION_FLAT) * M_PI || $fAngleAOB >= (1 + self::MAX_DEVIATION_FLAT) * M_PI ||
$fAngleAOBElev <= (1 - self::MAX_DEVIATION_ELEV) * M_PI || $fAngleAOBElev >= (1 + self::MAX_DEVIATION_ELEV) * M_PI);
}
private function buildGeoJson() {
return json_encode(array('type'=>'FeatureCollection', 'features'=>$this->asTracks));
}
private static function getDistance($asPointA, $asPointB) {
$fLatFrom = $asPointA[1];
$fLonFrom = $asPointA[0];
$fLatTo = $asPointB[1];
$fLonTo = $asPointB[0];
$fRad = M_PI / 180;
//Calculate distance from latitude and longitude
$fTheta = $fLonFrom - $fLonTo;
$fDistance = sin($fLatFrom * $fRad) * sin($fLatTo * $fRad) + cos($fLatFrom * $fRad) * cos($fLatTo * $fRad) * cos($fTheta * $fRad);
return acos($fDistance) / $fRad * 60 * 1.853;
}
}
}

32
lib/Geo.php Normal file
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@@ -0,0 +1,32 @@
<?php
namespace Franzz\Spot;
use Franzz\Objects\PhpObject;
use \Settings;
class Geo extends PhpObject {
const GEO_FOLDER = '../geo/';
const OPT_SIMPLE = 'simplification';
protected $asTracks;
protected $sFilePath;
public function __construct($sCodeName) {
parent::__construct(get_class($this), Settings::DEBUG, PhpObject::MODE_HTML);
$this->sFilePath = self::getFilePath($sCodeName);
$this->asTracks = array();
}
public static function getFilePath($sCodeName) {
return self::GEO_FOLDER.$sCodeName.static::EXT;
}
public static function getDistFilePath($sCodeName) {
return 'geo/'.$sCodeName.static::EXT;
}
public function getLog() {
return $this->getCleanMessageStack(PhpObject::NOTICE_TAB);
}
}

214
lib/GeoJson.php Normal file
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@@ -0,0 +1,214 @@
<?php
namespace Franzz\Spot;
class GeoJson extends Geo {
const EXT = '.geojson';
const MAX_FILESIZE = 2; //MB
const MAX_DEVIATION_FLAT = 0.1; //10%
const MAX_DEVIATION_ELEV = 0.1; //10%
public function __construct($sCodeName) {
parent::__construct($sCodeName);
}
public function saveFile() {
$this->addNotice('Saving '.$this->sFilePath);
file_put_contents($this->sFilePath, $this->buildGeoJson());
}
public function isSimplicationRequired() {
//Size in bytes
$iFileSize = strlen($this->buildGeoJson());
//Convert to MB
$iFileSize = round($iFileSize / pow(1024, 2), 2);
//Compare with max allowed size
$bFileTooLarge = ($iFileSize > self::MAX_FILESIZE);
if($bFileTooLarge) $this->addNotice('Output file is too large ('.$iFileSize.'MB > '.self::MAX_FILESIZE.'MB)');
return $bFileTooLarge;
}
public function buildTracks($asTracks, $bSimplify=false) {
$this->addNotice('Creating '.($bSimplify?'Simplified ':'').'GeoJson Tracks');
$iGlobalInvalidPointCount = 0;
$iGlobalPointCount = 0;
$this->asTracks = array();
foreach($asTracks as $asTrackProps) {
$asOptions = $this->parseOptions($asTrackProps['cmt']);
//Color mapping
switch($asTrackProps['color']) {
case 'DarkBlue':
$sType = 'main';
break;
case 'Magenta':
if($bSimplify && $asOptions[self::OPT_SIMPLE]!='keep') {
$this->addNotice('Ignoring Track "'.$asTrackProps['name'].' (off-track)');
continue 2; //discard tracks
}
else {
$sType = 'off-track';
break;
}
case 'Red':
$sType = 'hitchhiking';
break;
default:
$this->addNotice('Ignoring Track "'.$asTrackProps['name'].' (unknown color "'.$asTrackProps['color'].'")');
continue 2; //discard tracks
}
$asTrack = array(
'type' => 'Feature',
'properties' => array(
'name' => $asTrackProps['name'],
'type' => $sType,
'description' => $asTrackProps['desc']
),
'geometry' => array(
'type' => 'LineString',
'coordinates' => array()
)
);
//Track points
$asTrackPoints = $asTrackProps['points'];
$iPointCount = count($asTrackPoints);
$iInvalidPointCount = 0;
$asPrevPoint = array();
foreach($asTrackPoints as $iIndex=>$asPoint) {
$asNextPoint = ($iIndex < ($iPointCount - 1))?$asTrackPoints[$iIndex + 1]:array();
if($bSimplify && !empty($asPrevPoint) && !empty($asNextPoint)) {
if(!$this->isPointValid($asPrevPoint, $asPoint, $asNextPoint)) {
$iInvalidPointCount++;
continue;
}
}
$asTrack['geometry']['coordinates'][] = array_values($asPoint);
$asPrevPoint = $asPoint;
}
$this->asTracks[] = $asTrack;
$iGlobalInvalidPointCount += $iInvalidPointCount;
$iGlobalPointCount += $iPointCount;
if($iInvalidPointCount > 0) $this->addNotice('Removing '.$iInvalidPointCount.'/'.$iPointCount.' points ('.round($iInvalidPointCount / $iPointCount * 100, 1).'%) from '.$asTrackProps['name']);
}
if($bSimplify) $this->addNotice('Total: '.$iGlobalInvalidPointCount.'/'.$iGlobalPointCount.' points removed ('.round($iGlobalInvalidPointCount / $iGlobalPointCount * 100, 1).'%)');
}
public function sortOffTracks() {
$this->addNotice('Sorting off-tracks');
//Find first & last track points
$asTracksEnds = array();
$asTracks = array();
foreach($this->asTracks as $iTrackId=>$asTrack) {
$sTrackId = 't'.$iTrackId;
$asTracksEnds[$sTrackId] = array('first'=>reset($asTrack['geometry']['coordinates']), 'last'=>end($asTrack['geometry']['coordinates']));
$asTracks[$sTrackId] = $asTrack;
}
//Find variants close-by tracks
$asClonedTracks = $asTracks;
foreach($asClonedTracks as $sTrackId=>$asTrack) {
if($asTrack['properties']['type'] != 'off-track') continue;
$iMinDistance = INF;
$sConnectedTrackId = 0;
$iPosition = 0;
//Test all track ending points to find the closest
foreach($asTracksEnds as $sTrackEndId=>$asTrackEnds) {
if($sTrackEndId != $sTrackId) {
//Calculate distance between the last point of the track and every starting point of other tracks
$iDistance = self::getDistance($asTracksEnds[$sTrackId]['last'], $asTrackEnds['first']);
if($iDistance < $iMinDistance) {
$sConnectedTrackId = $sTrackEndId;
$iPosition = 0; //Track before the Connected Track
$iMinDistance = $iDistance;
}
//Calculate distance between the first point of the track and every ending point of other tracks
$iDistance = self::getDistance($asTracksEnds[$sTrackId]['first'], $asTrackEnds['last']);
if($iDistance < $iMinDistance) {
$sConnectedTrackId = $sTrackEndId;
$iPosition = +1; //Track after the Connected Track
$iMinDistance = $iDistance;
}
}
}
//Move track
unset($asTracks[$sTrackId]);
$iOffset = array_search($sConnectedTrackId, array_keys($asTracks)) + $iPosition;
$asTracks = array_slice($asTracks, 0, $iOffset) + array($sTrackId => $asTrack) + array_slice($asTracks, $iOffset);
}
$this->asTracks = array_values($asTracks);
}
private function parseOptions($sComment){
$sComment = strip_tags(html_entity_decode($sComment));
$asOptions = array(self::OPT_SIMPLE=>'');
foreach(explode("\n", $sComment) as $sLine) {
$asOptions[mb_strtolower(trim(mb_strstr($sLine, ':', true)))] = mb_strtolower(trim(mb_substr(mb_strstr($sLine, ':'), 1)));
}
return $asOptions;
}
private function isPointValid($asPointA, $asPointO, $asPointB) {
/* A----O Calculate angle AO^OB
* \ If angle is within [90% Pi ; 110% Pi], O can be discarded
* \ O is valid otherwise
* B
*/
//Path Turn Check -> -> -> ->
//Law of Cosines (vector): angle = arccos(OA.OB / ||OA||.||OB||)
$fVectorOA = array('lon'=>($asPointA['lon'] - $asPointO['lon']), 'lat'=> ($asPointA['lat'] - $asPointO['lat']));
$fVectorOB = array('lon'=>($asPointB['lon'] - $asPointO['lon']), 'lat'=> ($asPointB['lat'] - $asPointO['lat']));
$fLengthOA = sqrt(pow($asPointA['lon'] - $asPointO['lon'], 2) + pow($asPointA['lat'] - $asPointO['lat'], 2));
$fLengthOB = sqrt(pow($asPointO['lon'] - $asPointB['lon'], 2) + pow($asPointO['lat'] - $asPointB['lat'], 2));
$fVectorOAxOB = $fVectorOA['lon'] * $fVectorOB['lon'] + $fVectorOA['lat'] * $fVectorOB['lat'];
$fAngleAOB = ($fLengthOA != 0 && $fLengthOB != 0) ? acos($fVectorOAxOB/($fLengthOA * $fLengthOB)) : 0;
//Elevation Check
//Law of Cosines: angle = arccos((OB² + AO² - AB²) / (2*OB*AO))
$fLengthAB = sqrt(pow($asPointB['ele'] - $asPointA['ele'], 2) + pow($fLengthOA + $fLengthOB, 2));
$fLengthAO = sqrt(pow($asPointO['ele'] - $asPointA['ele'], 2) + pow($fLengthOA, 2));
$fLengthOB = sqrt(pow($asPointB['ele'] - $asPointO['ele'], 2) + pow($fLengthOB, 2));
$fAngleAOBElev = ($fLengthOB != 0 && $fLengthAO != 0) ? (acos((pow($fLengthOB, 2) + pow($fLengthAO, 2) - pow($fLengthAB, 2)) / (2 * $fLengthOB * $fLengthAO))) : 0;
return ($fAngleAOB <= (1 - self::MAX_DEVIATION_FLAT) * M_PI || $fAngleAOB >= (1 + self::MAX_DEVIATION_FLAT) * M_PI ||
$fAngleAOBElev <= (1 - self::MAX_DEVIATION_ELEV) * M_PI || $fAngleAOBElev >= (1 + self::MAX_DEVIATION_ELEV) * M_PI);
}
private function buildGeoJson() {
return json_encode(array('type'=>'FeatureCollection', 'features'=>$this->asTracks));
}
private static function getDistance($asPointA, $asPointB) {
$fLatFrom = $asPointA[1];
$fLonFrom = $asPointA[0];
$fLatTo = $asPointB[1];
$fLonTo = $asPointB[0];
$fRad = M_PI / 180;
//Calculate distance from latitude and longitude
$fTheta = $fLonFrom - $fLonTo;
$fDistance = sin($fLatFrom * $fRad) * sin($fLatTo * $fRad) + cos($fLatFrom * $fRad) * cos($fLatTo * $fRad) * cos($fTheta * $fRad);
return acos($fDistance) / $fRad * 60 * 1.853;
}
}

52
lib/Gpx.php Normal file
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<?php
namespace Franzz\Spot;
use Franzz\Objects\ToolBox;
class Gpx extends Geo {
const EXT = '.gpx';
public function __construct($sCodeName) {
parent::__construct($sCodeName);
$this->parseFile();
}
public function getTracks() {
return $this->asTracks;
}
private function parseFile() {
$this->addNotice('Parsing: '.$this->sFilePath);
if(!file_exists($this->sFilePath)) $this->addError($this->sFilePath.' file missing');
else {
$oXml = simplexml_load_file($this->sFilePath);
//Tracks
$this->addNotice('Converting '.count($oXml->trk).' tracks');
foreach($oXml->trk as $aoTrack) {
$asTrack = array(
'name' => (string) $aoTrack->name,
'desc' => str_replace("\n", '', ToolBox::fixEOL((strip_tags($aoTrack->desc)))),
'cmt' => ToolBox::fixEOL((strip_tags($aoTrack->cmt))),
'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;
}
//Waypoints
$this->addNotice('Ignoring '.count($oXml->wpt).' waypoints');
}
}
}