Deep Space vs. Flat Space
This image is a deep space image because it gives us the illusion of depth in a 2D picture. When you look at this picture, there is a vanishing point that could be drawn by lines of the ceiling and the floor. You can see that there are things in the distance, and it is not just flat space. Being that the doors and water fountain look smaller when they are farther away, the viewers will instead see it as an illusion of depth.
This image would be classified as flat space because there is size consistency and no perspective. There is a wall and the recycling bins seem to blend in and look very flat and 2D. Also, there would not be a way to draw vanishing points within this picture because it does not have any depth, the mind makes you think that you are not missing anything to either side of the image.
This image has limited space because you can see two obvious frontal planes. You can see the wall in the foreground and the refrigerators in the background. With these two planes, you can see the visual and physical separation between them.
This image has ambiguous space because you are unable to understand the actual size or spatial relationship. There is also a lack of movement and a disorienting camera angle to make it so the viewer is unable to understand what is truly happening within the image.