View property lines on desktop, then explore with your GPS unit or mobile device in the field. People live on parcels of land, buildings exist on parcels of land, businesses operate on parcels of land, and, unless it happens in the middle of the street, everything that happens in America happens on a parcel of land. This method can give you a reasonable confirmation of your property lines. You can customize the coverage and pricing to fit your needs. The plat map prevents the need to resurvey the land.