1. A method comprising: receiving map data descriptive of a parcel of land; receiving information indicative of at least one reference object disposed on the parcel, the at least one reference object having corresponding information for defining boundaries for a work area on the parcel associated therewith, the work area defining an area to be worked by a robotic vehicle; determining the boundaries responsive to detection of the at least one reference object; and operating the robotic vehicle to remain within the area defined by the boundaries.