Pieces of land are divided into two categories: plats and tracts. Plats are parcels of land that have been surveyed, divided, and mapped out in a specific area. They are usually smaller than tracts and are used for residential or commercial development. Tracts are larger pieces of land that are usually used for agricultural purposes. They are not surveyed or mapped out like plats, but are instead identified by their boundaries. Both plats and tracts are important pieces of land that are used for various purposes.