A Shared Directory of Local Food

While browsing the Food Routes website, which is dedicated to promoting local food buying, I ran across this description of their database:

In collaboration with eatwellguide.org, FoodRoutes brings you an online map that can help you find locally-produced food near you. This map combines multiple directories from organizations around the nation into one powerful database. In the directory, you'll find descriptions, phone numbers, addresses, web sites, crop lists, and directions all to make local food purchasing that much easier.

I would love to know how they combine all those directories and keep them up to date, and whether the Data Commons Project can help them do that better.