footprint

(fo͝otˈprĭntˌ)

1. An outline or indentation left by a foot on a surface. Also called footmark, footstep.
2. The surface space occupied by a structure or device: the footprint of a building; a microcomputer with a space-saving footprint.
3. An area within which a spacecraft is supposed to land.
4. A designated area affected or covered by a device or phenomenon: the footprint of a communications satellite.