Simplify the following text for a Grade 13 native English-speaking person.
Original: In architecture and building engineering , a floor plan , or floorplan , is a diagram , usually to scale , showing a view from above of the relationships between rooms , spaces and other physical features at one level of a structure .
Simplified: A floor plan ( floorplan ) in architecture and building engineering is a diagram , usually to scale , of the relationships between rooms , spaces and other physical features at one level of a structure .