Showing bird pictures from around the world is nice—but what about giving users the ability to show a photo with any tag they want? That's what we'll do next.
So far, we've created a map that lets users interact with Flickr data. As far as we're concerned, we're more or less done with the interaction part. Now we'll focus on changing the 'data source' part. Currently, we're only asking for photos with the tag bird, but we want to allow that to be any tag.
An important concept in application development is to keep things modular. This basically means that we try to write out applications in such a way that we can take out and put in different parts without drastically changing the rest of our code. In this case, we're going to leave the interaction part of our code alone (what we've done so far at least) and focus mainly on the code that retrieves data.