Description: The Public Land Survey System (PLSS) is a method used in the United States to survey and identify land parcels, particularly for titles and deeds of rural, wild or undeveloped land. It is sometimes referred to as the rectangular survey system, although non rectangular methods such as meandering can also be used. The system was created by the Land Ordinance of 1785. It has been expanded and slightly modified by Letters of Instruction and Manuals of Instruction, issued by the General Land Office and the Bureau of Land Management and continues in use in most of the states west of Pennsylvania, south to Florida, Alabama, and Mississippi, west to the Pacific Ocean, and north into the Arctic in Alaska.The public lands survey system is a retangular grid system based on 6 mile square "townships" identified by a township and range number. Townships are numbered north or south of a baseline and ranges are numbered east and west of a standard meridian. Baselines and meridians are established by the US Government. Each township is divided into (typically) 36 sections that are a mile square. Sections contain, nominally, 640 acres and are numbered in a continuous pattern from 1 in the upper right (Northeast) of the township to 36 at the lower right (Southeast) corner.This dataset includes the sections for San Diego County as well as Spanish Land Grants. Data is approximate and may not be acurately tied to survey control points.