26 August 2010

photo meta-data

Continuing the inconsistent series on digital history...

Facts about files are often written into the files themselves. This
information is called metadata. A common example of this is digital photos.
Most digital cameras will record stuff about the photo, such as the model
camera used, the date and time the picture was taken, camera settings like
f-stop, etc. Newer devices like the iPhone that have built in GPS receivers
will also add lat-long coordinates, which allows for some very cool indexing
after the fact, like listing all photos by location, or by location and
time. (It also leads to some pesky security problems, such as a photo
posted to flickr giving away your location.)

This metadata is referred to as exif, and you can view and edit it with the
appropriate software. See below for more.

http://regex.info/exif.cgi

http://www.friedemann-schmidt.com/software/exifer/

http://en.wikipedia.org/wiki/Exif

tags: software, history-digital, privacy, security, links

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