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I've enjoyed bringing a handheld GPS device along with me on my photo trips. Not only are they great navigational aids but, with the help from other third party applications, it is possible to embed your location information into the XMP metadata of your photos taken that day.
Once the GPS information has been embedded in each photos' metadata, Lightroom will display the longitude, latitude and altitude (if included) inside the Metadata panel. Along with the display Lightroom also includes a link to open those coordinates right inside GoogleMaps (you'll need to be connected to the Internet to make that work).
I'm currently working on a tutorial on how to get your GPS data into your photos and then on how to incorporate that information into a Web gallery that similarly links to GoogleMaps. It really adds an incredible dimension to your photography!