As used in sections 25-109c to 25-109k, inclusive, “conservation zone” means the zone described in section 25-109d; “development rights” means the rights of the owner of property to improve such property, including the right to change the terrain, remove natural vegetation and construct buildings thereon; “land coverage” means that portion of a given plot of land on which construction is permitted; “scenic easement” means a less than fee interest in property acquired for the purpose of maintaining the existing condition of the property or of preserving an unobstructed view.