When you have a series of photographs from a single location, such as the Golden Gate Bridge, you can geotag the entire shoot at once in iPhoto '09. Simply find the shoot in the Events browser. Click on the little "i" that's in the lower right corner of the key photo for the Event, then choose "New Place" for the "Enter Event Location" pop up menu. Once you've tagged the event, that geodata will be applied to all of the images in the series.
You can watch a free movie on how to do this as part of my new Lynda.com title, iPhoto '09: Ten Things to Know About Places.
Other iPhoto '09 Titles by Derrick Story
iPhoto '09: Ten Things to Know About Faces
See My Other Posts on Geotagging
A Quick Primer on Geotagging
"Introduction to Geotagging" - Digital Photography Podcast 165
Testing the Eye-Fi Explore Card at Home
Geotagging a Journey with photoGPS, iPhoto, and Flickr
iPhoto '09 as Your Geotagging Tool?
First Look at Jobo photoGPS Device and Software
Update to Geotagging Workflow, Including Jobo photoGPS
Finding a Reasonable Geotagging Workflow
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Join me on March 28 for "How I Did It" - A Workshop in High-Impact Photography
Derrick Story, digital photography, geotagging, iPhoto '09, Technology, The Digital Story