Fotopedia is a collaborative open source photo encyclopedia. The site is an interesting blend of the knowledge of Wikipedia combined with the expansive array of image of flickr. The emphasis is more on the side of the photos, however each collection of photos is accompanied by a brief encyclopedia article. The number of photos and quality of photos for each entry is all dependent on what has been uploaded.
One the more valuable features of Fotopedia is that the site is easily searchable by categories. These categories allow users who are interested in a particular type of photo to easily find the images they desire. The category feature can be particular useful for anyone researching a specific topic. The site is also keyword searchable. However, the keyword search results are not always as neatly organized as the rest of the site.
Fotopedia also hosts a "Fotopedia Community" designed to allow interaction between users. This social media feature allows photos to be commented on, voted on, highlights best contributors, and a variety of other interactive features. This site has great potential for sharing photos, geocaching, and providing context to photos that may otherwise be merely a picture.