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Flickr Hacks by Jim Bumgardner, Paul Bausch

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Hack #12. Geotag Your Photos

You can use Flickr tags to describe the exact location where you took a photo, and then display your geographically precise photos on a map.

Any location on Earth can be addressed with a set of two-number coordinates called latitude and longitude. While you probably learned about coordinates in school, chances are you haven't had much need for reading them, unless you make maps or go hiking in the wilderness. With the proliferation of handheld GPS units and online maps, though, latitude and longitude have wandered back into our everyday vocabulary—and into the world of Flickr photos.

Using Flickr's tagging features [Hack #10] , some members describe the exact latitude and longitude of their positions on Earth when they took particular photos. This practice is called geotagging, and it can lead to fun activities such as viewing your photos on a map and finding other photos that were taken in specific locations.

The recipe for geotagging your photos is simple. Note the locations where you take your photos, upload them to Flickr, and add three specific tags to the photos with the following formats:

geo:lat= latitude
geo:lon= longitude
geotagged

The geotagged tag lets others know that the photo has been given a specific location, and the other two tags describe that location. As you know, latitude and longitude aren't exactly found on every street sign, so the work involved with geotagging is finding out your coordinates.

Without a GPS Unit

Your first thought might ...

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