Public domain photos
The image shows a black and white drawing of a cross in the middle of a white background, which is the floor plan of a building. The cross is composed of a series of interconnected circles and lines, with each circle representing a different aspect of the building's structure. The circles are connected by arrows, indicating the direction of the flow of information between them. The white background provides a stark contrast to the black lines of the cross, making it stand out.
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