This photo Of the Redlin Center in Watertown, SD, was taken with my iPhone 4s. It was then processed with Camera+ and Instagram, a photo taking, editing and publishing app which is hugely popular right now.Instagram requires a square crop, and that's the reason for the title of today's post. I don't have much else to say other than the square crop is fun to work with from time to time because it requires a rethinking of the compositional element of space. And, as photographers, it's good to "rethink" from time to time.Incidentally, I apply the same filter to all of my Instagram posts. The filter tends to over saturate colors and in the case of this photo the dominant tones are the three primary colors: red, blue and yellow. I like that in this photo.