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<?php
/*!*******************************************************************************
*! FILE NAME : exif2kml.php
*! DESCRIPTION : exracts location information into a KML file from images
*! REVISION : 1.00
*! AUTHOR : Oleg Dzhimiev <oleg@elphel.com>
*! Copyright (C) 2012 Elphel, Inc
*! -----------------------------------------------------------------------------**
*! This program is free software: you can redistribute it and/or modify
*! it under the terms of the GNU General Public License as published by
*! the Free Software Foundation, either version 3 of the License, or
*! (at your option) any later version.
*!
*! This program is distributed in the hope that it will be useful,
*! but WITHOUT ANY WARRANTY; without even the implied warranty of
*! MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
*! GNU General Public License for more details.
*!
*! The four essential freedoms with GNU GPL software:
*! * the freedom to run the program for any purpose
*! * the freedom to study how the program works and change it to make it do what you wish
*! * the freedom to redistribute copies so you can help your neighbor
*! * the freedom to distribute copies of your modified versions to others
*!
*! You should have received a copy of the GNU General Public License
*! along with this program. If not, see <http://www.gnu.org/licenses/>.
*! -----------------------------------------------------------------------------**
*/
require "pano.inc";
$LEFTFOV = -180;
$RIGHTFOV = +180;
$BOTTOMFOV = -90;
$TOPFOV = +90;
$NEAR = 10000; //meters?
if (isset($_GET['path'])) $path = $_GET['path'];
else if (isset($argv[1])) $path = $argv[1];
if (isset($_GET['ext'])) $ext = $_GET['ext'];
else if (isset($argv[2])) $ext = $argv[2];
if (isset($_GET['dest'])) $some_dir = $_GET['dest'];
else if (isset($argv[3])) $some_dir = $argv[3];
if (isset($_GET['index'])) $some_index = $_GET['index'];
else if (isset($argv[4])) $some_index = $argv[4];
if (isset($_GET['visibility'])) $visibility = $_GET['visibility'];
else if (isset($argv[5])) $visibility = $argv[5];
$directory = $path;
$filename ="../results/for_wpe/map.kml";
echo "directory=$directory\n";
echo "filename= $filename\n";
chdir($directory);
$files=glob("*_1.$ext");
$numNodes=count($files);
echo "nNodes= $numNodes\n";
$world=array();
$i=0;
for ($j=0;$j<$numNodes;$j++) {
if (strpos($files[$j],"_1")) {
//echo strpos($files[$j],"_1")." $i\n";
$world[$i]['href']=$files[$j];
$exif_data = exif_read_data($files[$j]);
$world[$i]['longitude']=(($exif_data['GPSLongitudeRef']=="W")?-1:1)*array2degrees($exif_data['GPSLongitude']);
$world[$i]['latitude']= (($exif_data['GPSLatitudeRef'] =="S")?-1:1)*array2degrees($exif_data['GPSLatitude']);
$world[$i]['altitude']= (($exif_data['GPSAltitudeRef'] =="1")?-1:1)*parseAlt($exif_data['GPSAltitude']);
$world[$i]['DateTimeOriginal']= $exif_data['DateTimeOriginal'];
$world[$i]['SubSecTimeOriginal']= $exif_data['SubSecTimeOriginal'];
if (isset($exif_data['GPSImgDirection'])) {
$world[$i]['heading']= parseAlt($exif_data['GPSImgDirection']); // add correction from magnetic?
$world[$i]['tilt']= (($exif_data['GPSDestLatitudeRef'] =="S")?-1:1)*array2degrees($exif_data['GPSDestLatitude'])+90.0;
if ($world[$i]['tilt']<0) $world[$i]['tilt']==0;
else if ($world[$i]['tilt']>180) $world[$i]['tilt']=180;
$world[$i]['roll']=(($exif_data['GPSDestLongitudeRef']=="W")?-1:1)*array2degrees($exif_data['GPSDestLongitude']);
}
else{
$world[$i]['heading']=0;
$world[$i]['tilt']=90;
$world[$i]['roll']=0;
}
$i++;
}
}
$numNodes = count($world);
// $file=fopen ($filename,'w');
// fwrite($file,generateKML());
// fclose($file);
// works by a couple microseconds slower
file_put_contents($filename,generateKML());
chmod($filename,0666);
function array2degrees($dms) {
$round=1000000;
$d=explode('/',$dms[0]);
$m=explode('/',$dms[1]);
$s=explode('/',$dms[2]);
$rslt= $d[0]/$d[1]+($m[0]/$m[1])/60.0+($s[0]/$s[1])/3600.0;
return round($round*$rslt)/$round;
}
function parseAlt($alt) {
$round=1000000;
$a=explode('/',$alt);
$rslt= $a[0]/$a[1];
return round($round*$rslt)/$round;
}
function generateKML($index=-1) {
global $LEFTFOV;
global $RIGHTFOV;
global $BOTTOMFOV;
global $TOPFOV;
global $NEAR;
global $world, $map, $numNodes;
global $some_dir;
global $some_index;
global $visibility;
if ($index<0) $indices=range(0,$numNodes-1);
else $indices=array_merge(array(0=>$index),$map[$index]);
$kml=<<<HEADER
<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://earth.google.com/kml/2.2">
<Document>
HEADER;
foreach ($indices as $i) {
$dataTime = convert_to_some_time_format($world[$i]['DateTimeOriginal'],$world[$i]['SubSecTimeOriginal']);
$href = modify_href($world[$i]['href']);
$kml.= "<PhotoOverlay>\n";
$kml.= "\t<name>".($i+$some_index)."</name>\n";
$kml.= "\t<visibility>$visibility</visibility>\n";
$kml.= "\t<shape>rectangle</shape>\n";
$kml.= "\t<TimeStamp>\n";
$kml.= "\t\t<when>".$dataTime."</when>\n";
$kml.= "\t</TimeStamp>\n";
$kml.= "\t<Camera>\n";
$kml.= "\t\t<longitude>".$world[$i]['longitude']."</longitude>\n";
$kml.= "\t\t<latitude>".$world[$i]['latitude']."</latitude>\n";
$kml.= "\t\t<altitude>".$world[$i]['altitude']."</altitude>\n";
$kml.= "\t\t<heading>".$world[$i]['heading']."</heading>\n";
$kml.= "\t\t<tilt>".$world[$i]['tilt']."</tilt>\n";
$kml.= "\t\t<roll>".$world[$i]['roll']."</roll>\n";
$kml.= "\t</Camera>\n";
$kml.= "\t<Icon>\n";
$kml.= "\t\t<href>$some_dir/".$href."</href>\n";
$kml.= "\t</Icon>\n";
$kml.= "\t<ExtendedData>\n";
$kml.= "\t\t<OriginalData>\n";
$kml.= "\t\t\t<longitude>".$world[$i]['longitude']."</longitude>\n";
$kml.= "\t\t\t<latitude>".$world[$i]['latitude']."</latitude>\n";
$kml.= "\t\t\t<altitude>".$world[$i]['altitude']."</altitude>\n";
$kml.= "\t\t\t<heading>".$world[$i]['heading']."</heading>\n";
$kml.= "\t\t\t<tilt>".$world[$i]['tilt']."</tilt>\n";
$kml.= "\t\t\t<roll>".$world[$i]['roll']."</roll>\n";
$kml.= "\t\t</OriginalData>\n";
$kml.= "\t</ExtendedData>\n";
$kml.= "</PhotoOverlay>\n";
}
$kml.=<<<TRAILER
</Document>
</kml>
TRAILER;
return ($kml);
}
function convert_to_some_time_format($date,$usec){
$date[4] = "-";
$date[7] = "-";
$date[10] = "T";
$date .= ".{$usec}Z";
return $date;
}
function modify_href($name) {
//$name = substr_replace($name,"",strpos($name,"_1-"),2);
$name = "result_".substr($name,0,-6).".jpeg";
return $name;
}
?>

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