function computeGeoInfo() {
$changed=0;
$gotTrack=0;
foreach ( $this->photos as $photoNum=>$photoInfo) {
if ($photoInfo['tm']==1) { // 1 -> we have alredy tried to get geotag info but failed
continue;
}
if (!$photoInfo['tm']) { // no attemp was made to get GeoInfo
$imgPath=$this->getPhotoAbsPath($photoNum);
$gpsData = CLimage::getGPS($imgPath);
$this->photos[$photoNum]['lat']=$gpsData[0];
$this->photos[$photoNum]['lon']=$gpsData[1];
$this->photos[$photoNum]['tm']=$gpsData[2]; // warning tm in local time ...
$changed=1; // we got at least the tm
}
if (!$this->photos[$photoNum]['tm']) {
$this->photos[$photoNum]['tm']=1;
$changed=1;
continue;
}
if (!$this->photos[$photoNum]['lat'] && !$this->photos[$photoNum]['lon']) {
// try to get lat/lon depending on the position in track
if (!$gotTrack) {
//echo "getting track!";
$flight=new flight();
$flight->getFlightFromDB($this->flightID,0); //dont update takeoffs
list($trackLat,$trackLon,$trackTms,$trackAlt)=$flight->getXYValues(1,1); // get also TM and ALT
$gotTrack=1;
}
//correct the tm of the photo that we got from EXIF by subtracking up the timezone offset
$this->photos[$photoNum]['tm']-=$flight->timezone*3600;
//we will use this to add to every time entry we gto from getXYValues()
$startTm=strtotime($flight->DATE);
//echo "Flight start time is ".$flight->DATE." -> ".$startTm;
$lastTm=$startTm;
$photoTm=$this->photos[$photoNum]['tm'];
//echo " starttime:$lastTm photo : $photoTm<BR>".count($trackTms);
foreach($trackTms as $i=>$tm) {
$thisTm=$startTm+$tm;
if ( $photoTm<$thisTm && $photoTm>$lastTm ) {
//echo "found position!!! tm=$thisTm<BR>";
$this->photos[$photoNum]['lat']=$trackLat[$i];
$this->photos[$photoNum]['lon']=-$trackLon[$i];
$this->photos[$photoNum]['alt']=$trackAlt[$i];
$changed=1;
break;
}
}
}
}
if ($changed) {
$this->putToDB(0); // dont update the flights table
}
}