(A)     Density, Gross

The number of dwelling units on a particular tract or parcel of land, taking into account the entire area of that tract or parcel.

(B)     Density, Net

The total number of dwelling units on a particular tract or parcel of land, not taking into account portions of the tract or parcel that contain rights-of-way for collector or larger streets, Flood Hazard Area, lakes or other water bodies, or wetlands falling under the regulatory jurisdiction of the U.S. Army Corps of Engineers, but taking into account all other areas of the tract or parcel.

(C)     Floor Area

The gross total horizontal area of all floors, including usable basements and cellars, below the roof and within the outer surface of the main walls of principal or accessory buildings, or the centerlines of a party wall separating such buildings or portions thereof, or within lines drawn parallel to and two feet within the roofline of any building or portions thereof without walls, but excluding, in the case of non-residential facilities, arcades, porticos, and similar areas open to the outside air which are accessible to the general public and which are not designed or used as areas for sales, display, storage, service, or production.

(D)     Building Footprint

The ratio of the horizontal area measured from the exterior surface of the exterior walls of the ground floor of all principal and accessory buildings on a lot to the total lot area.