Definition of launchpad. : a nonflammable platform from which a rocket, launch vehicle, or guided missile can be launched.
Terrain is defined as the specific physical features of an area of land. An example of terrain is a rocky and jagged coastline. ground or a tract of ground, esp. with regard to its natural or topographical features or fitness for some use.
Topography is a branch of geography, which is concerned with the study of surface features of the Earth and other observable astronomical objects such as sun, moon, and planets. The phrase topography of an area refers to the natural and artificial physical features of an area.