After we published Paul’s interview last week, he wrote in to let us know Groupr had been dusted off and was alive and well again. And followed it up with a post on machine tags, and automated EXIF extraction, two of our favorite topics here at Code.Flickr:

Why bother with such a thing? Flickr will extract EXIF metadata, but it won’t allow you to do any aggregate queries on it. By extracting all the data from my photos into machine tags (and a local SQLite database), it becomes possible to point people at all the photos taken at the wide end of my widest lens, or those taken with a particular make of camera (and to do more complex queries locally). – Flickr, EXIF, Machine Tags