Ubermind has released a new (free) plug-in for Apple Aperture called Maperture.
According to the company, it combines the power of Aperture and Google Maps and makes geotagging your photos a snap.
Add or update global positioning system (GPS) data to your digital photos
Scales from a few images to your entire library
Elegant, responsive user-interface
Location aware photos, just a few clicks away
I tried it and it is very easy to use.
NOTE: Cross Posted at http://aperturenatureworkshops.com/