The document discusses various aspects of building planning including proportion, orientation, and site plans. It defines proportion as the visual relationships between objects and spaces that make up a structure. Orientation refers to fixing the direction of a building plan in relation to north. Site plans show the layout of a property including locations of buildings, driveways, walkways, and landscaping. There are 2D and 3D site plans, with 2D being simple diagrams and 3D being full-colored 3D renderings. Building planning aims to arrange various building components systematically to meet functional needs.