A plat of survey is a map that is drawn to a specific set of standards outlined by the State of Illinois and shows the boundaries, dimensions, and area of the property survey as well as any potential encroachments or title issues. This map is signed and sealed by a Professional Land Surveyor and will serve as proof that you had your property surveyed. This map is also suitable for recording in the office of the Recorder of Deeds and can serve as evidence in court during a boundary dispute.