This picture represents the setting of To Kill a Mockingbird, in many ways. For example, the book is set in southern Alabama, where it's relatively hot and dusty, and you can tell that the setting of the picture has similar traits, when you look at how none of the children have shoes on, and their all dressed for that type of weather. You don't see coats on them, and they have big hats that could potentially shield their eyes from the sun. In addition to that, you can infer that the ground below them, is dry and dusty dirt or sand, by analyzing the possible texture of the ground.
Another possible connection to the book that I can see, is the character similarities. The young children in the picture, could be like Scout, Jem, and Dill. By studying their facial expressions and moods, we can see the resemblance of curiosity, mischief, excitement, and yet seriousness at times, maybe even a little sadness too, which can all be seen in the child characters of the book.
A final similarity between this photograph and the book, was the clothing, and the fact that the picture was taken in black and white. First off all, the clothes that the people in the picture seem from previous generations, and you don't really see kids going around today in those sorts of clothing. Overalls, sun hats, and you don't see girls wearing skirts outside without shoes on. Skirts are usually for special occasions or celebrations, and aren't utilized for every day activity anymore. Second, the picture was taken in black and white, which isn't common at all these days, but was the only option several years ago. All these clues, connections, and similarities help me to realize more and more that this picture relates to the setting, time period, and characters of the book To Kill a Mockngbird.