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Sorry, I am newbie with GeoTIFF files. I want to create a project that a person can upload a GeoTIFF file and the web application saves the lat/long of the picture into the database, the server side programming based on php and the database is MySQL.

Is there a library or a way to read and extract information of a GeoTIFF picture with php or javascript?

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  • Are you sure you mean GeoTIFF, and not the location stored in a picture's EXIF tags? You can read the latter with PHP's exif_read_data function. If the file really is a GeoTIFF, this question's a duplicate of How to read GeoTIFF using PHP?. – scruss Sep 13 '14 at 18:37
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there is a php extension called php-gdal

I found some install instructions: https://www.drupal.org/node/2133103

the main site: https://github.com/geonef/php5-gdal

helpful? http://dl.maptools.org/dl/php_ogr/php_ogr_documentation.html

I looked at scruss' suggestion: ( How to read GeoTIFF using PHP? ) and downloaded the code to take a look at. I'm not convinced it is what you need. Close, but I think you'll find yourself stripping most of the code away and possible need to add some of your own. Best to try and find something pre-made. Hopefully the php-gdal will work for you. I have not tried it but use gdal in python regularly and it is great.

Be sure to let us know how it goes.

another possibility: http://www.invet.net/images/catalog/creating_maps.pdf

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You need to read the location from the Geotiff header. Full documentation can be found at http://trac.osgeo.org/geotiff/ . I do not think it stores the center so you may have to take the 4 boundaries and average. You have a few choices including some APIS. as for direct read using javascript or php I do not know of a way. Anyway I think listgeo is a good starting point.

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  • thank you for your attention , i searched any where and read many documents but cant find the solution,i just need the coordinate of boundaries – Amirtee Sep 13 '14 at 15:22
  • But this does have it, I have used it remotesensing.org/geotiff/listgeo.html It gives your the coordinates – If you do not know- just GIS Sep 13 '14 at 16:31
  • sorry but i dont know how use it , perhabs this application based on windows , is there any example?? – Amirtee Sep 13 '14 at 17:15

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