Visual impact assessment prepared by a registered landscape architect or other qualified professional to include, but not be limited to, visual illustration and evaluation of the relationship of proposed new structures or alterations to nearby natural landscapes and to preexisting structures in terms of visual character and scale, materials, color, odor, door, roof and cornice lines, and other major design elements. This assessment shall also include an analysis of the visual impacts on neighboring properties from the proposed development and alterations, and of the location and configuration of proposed structures, parking areas, open space, and gradient changes.