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Exchangeable image file format (officially Exif, according to JEIDA/JEITA/CIPA specifications) [5] is a standard that specifies formats for images, sound, and ancillary tags used by digital cameras (including smartphones), scanners and other systems handling image and sound files recorded by digital cameras.
Location information can also be added to photos, for example via its Exif specification that has fields for longitude/latitude, even if no GPS device was present when the photo was taken. The information can be entered by directly giving the coordinates or by selecting a location from a map using software tools.
In order to integrate geotags in social media and enhance text readability or oral use, the concept of 'meetag' or tag-to-meet has been proposed. Differing from hashtag construction, meetag includes the geolocation information after an underscore. A meetag is therefore a word or an unspaced phrase prefixed with an underscore ("_").
A few cameras have built-in geolocation capability. Most, apart from smartphones , do not, so many photographers rely on external GPS receivers to determine location. Location may be inserted immediately into the picture file by tethering with Bluetooth or suitable wired connection, which are about as rare in cameras as the built-in ...
file name, comments, most Exif and meta data Yes linear, block, complex Yes Exif and IPTC Yes many editing function Yes Yes Yes by changing EXIF orientation and not in editor Yes Geotagging, batch processing, detect duplicate/similar images, export to Internet/social media/HTML Eye of GNOME: No No Yes Yes Rotate Yes unconfigurable Yes F-Spot: Yes
ExifTool is a free and open-source software program for reading, writing, and manipulating image, audio, video, and PDF metadata.As such, ExifTool classes as a tag editor.It is platform independent, available as both a Perl library (Image::ExifTool) and a command-line application.
Furthermore, as the geographical information is written to the meta data, the image itself can be shared between compatible devices or uploaded to Navman's NavPix Library which offers a wide range of NavPix images that have been taken by both Navman users and sourced from professional photo providers, including Lonely Planet.
The Nikon GP-1 is a Global Positioning System (GPS) accessory receiver manufactured by Nikon that collects geographic coordinate data and places it into the Exif data of a picture. It connects to the camera via a proprietary cable and can be mounted on the flash shoe or on the camera strap.