HowTo: Geodata from exif into image

[chilly_bang]

Problem: phoca read exif data but geodata must be set into each image only on manual way.
We wish:
first, that every image, if it has geodata in its exif, get geocoordinates automagically after upload, and
second, that all automatically geotagged images get geozoom level 13.
Solution:

We must change 5 files:

1. administrator/components/com_phocagallery/libraries/phocagallery/file/file.php
we declare function that we use after on all places, where we upload images. At the end of file add

Code: Select all

function getGeoCoords($filename){
		$fileOriginal = PhocaGalleryFile::getFileOriginal($filename);
		$exif = @exif_read_data($fileOriginal, 0, true);
		$GPSLatDeg = explode('/',$exif['GPS']['GPSLatitude'][0]);
		$GPSLatMin = explode('/',$exif['GPS']['GPSLatitude'][1]);
		$GPSLatSec = explode('/',$exif['GPS']['GPSLatitude'][2]);
		$GPSLonDeg = explode('/',$exif['GPS']['GPSLongitude'][0]);
		$GPSLonMin = explode('/',$exif['GPS']['GPSLongitude'][1]);
		$GPSLonSec = explode('/',$exif['GPS']['GPSLongitude'][2]);
		$lat = $GPSLatDeg[0]/$GPSLatDeg[1]+
				($GPSLatMin[0]/$GPSLatMin[1])/60+
				($GPSLatSec[0]/$GPSLatSec[1])/3600;
		$long = $GPSLonDeg[0]/$GPSLonDeg[1]+
				($GPSLonMin[0]/$GPSLonMin[1])/60+
				($GPSLonSec[0]/$GPSLonSec[1])/3600;
		// $exif['GPS']['GPSLatitudeRef'] SHIROTA: N=+; S=-
		// $exif['GPS']['GPSLongitudeRef'] DOLGOTA: E=+; W=-
		if($exif['GPS']['GPSLatitudeRef'] == 'S'){$lat=$lat*(-1);}
		if($exif['GPS']['GPSLongitudeRef'] == 'W'){$long=$long*(-1);}
		
		return array('latitude'=>$lat,'longitude'=>$long);
	}

2. administrator/components/com_phocagallery/models/phocagallery.php
Befor lines

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//clean alias name (no bad characters)
		$data['alias'] = PhocaGalleryText::getAliasName($data['alias']);

we add

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if($data['longitude'] == '' || $data['latitude'] == ''){
			$coords=PhocaGalleryFile::getGeoCoords($data['filename']);
		}
		if ($data['longitude'] == '' ){
			$data['longitude'] = $coords['longitude'];
		}
		
		if ($data['latitude'] == '' ){
			$data['latitude'] = $coords['latitude'];
			//$data['videocode']=print_r($teststring,true);
		}
		
		if ($data['zoom'] ==''){
			$data['zoom'] = 13;
		}

3. administrator/components/com_phocagallery/models/phocagallerym.php
After line

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$datam['imgorigsize'] 	= PhocaGalleryFile::getFileSize($datam['filename'], 0);

we add

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$coords=PhocaGalleryFile::getGeoCoords($datam['filename']);
						$datam['longitude']		= $coords['longitude'];
						$datam['latitude']		= $coords['latitude'];
						$datam['zoom']			= 13;	

4. administrator/components/com_phocagallery/front/models/category.php
Befor lines

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$row =& $this->getTable('phocagallery');
		
		// Bind the form fields to the Phoca gallery table

we add

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	if((!isset($data['longitude']) || (isset($data['longitude']) && $data['longitude'] =='')) ||
		   (!isset($data['latitude'])  || (isset($data['latitude'])  && $data['latitude'] ==''))
		  ){$coords=PhocaGalleryFile::getGeoCoords($data['filename']);}
		
		if (!isset($data['longitude']) || (isset($data['longitude']) && $data['longitude'] =='')){
			$data['longitude'] = $coords['longitude'];
		}
		
		if (!isset($data['latitude']) || (isset($data['latitude']) && $data['latitude'] =='')){
			$data['latitude'] = $coords['latitude'];
		}
		
		if (!isset($data['zoom']) || (isset($data['zoom']) && $data['zoom'] =='')){
			$data['zoom'] = 13;
		}

5. components/com_phocagallery/models/category.php
Befor lines

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	$row =& $this->getTable('phocagallery');
		
		// Bind the form fields to the Phoca gallery table

we add

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	if((!isset($data['longitude']) || (isset($data['longitude']) && $data['longitude'] =='')) ||
		   (!isset($data['latitude'])  || (isset($data['latitude'])  && $data['latitude'] ==''))
		  ){$coords=PhocaGalleryFile::getGeoCoords($data['filename']);}
		
		if (!isset($data['longitude']) || (isset($data['longitude']) && $data['longitude'] =='')){
			$data['longitude'] = $coords['longitude'];
		}
		
		if (!isset($data['latitude']) || (isset($data['latitude']) && $data['latitude'] =='')){
			$data['latitude'] = $coords['latitude'];
		}
		
		if (!isset($data['zoom']) || (isset($data['zoom']) && $data['zoom'] =='')){
			$data['zoom'] = 13;
		}

Save and enjoy! After upload or multiple upload of images from backend and frontend add you images to categories and open: each image, that has geodata inside of its exif has lon and lat filled in. Don't forget to backup befor any changes;)

[Jan]

Hi, thank you very much for this improvement.

Jan

[Jan]

Implemented with minor changes (plus added the code to user model) in 3.0.1

Thank you, Jan

[nhtim]

I think this is what I want for version 2.8 for Joomla 1.5! I thought this was already in version 2.8. Jan..... is this what needs to be done for version 2.8?

[Jan]

Hi, for now I found time to implement it only to 3.0.1

Jan

[nhtim]

OK, this answered my question in the other post. Sorry to hear it it could not be implemented in 2.8 I was so hoping to use the phoca gallery for my site. There is another extension that has this function, but I like the layout of phoca gallery and admin so much better. Thank you for your patience in answering all my questions Jan!

[Jan]

Ok

[nhtim]

Jan,

Do you think that if I followed what chilly_bang posted at the start of this message into Phoca Gallery 2.8 for Joomla 1.5... that it might give me what I am looking for, at least temporarily until you fully implement it into the version for 1.5? I must say that it appears that you care about Phoca Gallery very much, and I appreciate your hard work!!!

[Jan]

Hi, yes, I have implemented the feature followed by this guide.

Jan

[nhtim]

HI Jan,

Thanks to you and chilly_bang! I have gotten the geotagging working on my website! Now my visitors will have a much more enjoyable experience viewing the photos from my trip. Hey Jan, I do not know where you live in the Czech Republic, but I will be in Ostrava and Prague the beginning of September. Send me an email and maybe we can meet up and I will buy you a beer!

Tim