The process of adding geographic information to a photograph is known as geotagging.
Photo-sharing communities like Panoramio, locr or Flickr equally allow their users to upload geocoded pictures or to add geolocation information online.
Exif data are embedded within the image file itself.
When Exif is employed for JPEG files, the Exif data are stored in one of JPEG's defined utility Application Segments, the APP1 (segment marker 0x FFE1), which in effect holds an entire TIFF file within.
When Exif is employed in TIFF files (also when used as "an embedded TIFF file" mentioned earlier), the TIFF Private Tag 0x8769 defines a sub-Image File Directory (IFD) that holds the Exif specified TIFF Tags.
Some other cameras have a separate GPS receiver that fits into the flash connector or hot shoe.
Recorded GPS data can also be added to any digital photograph on a computer, either by correlating the time stamps of the photographs with a GPS record from a hand-held GPS receiver or manually by using a map or mapping software.
Version 2.1 of the specification is dated 12 June 1998. "Exif Print"), dated 20 February 2002 and released in April 2002.