PLSS maps

 PLSS (Public Land Survey System) maps   show the  subdivision of public land in the United States. It is a uniform rectangular system of  blocks to which all areas of public domain are subjected. The blocks are laid out from meridians established across the United States. The Bureau of  Land Mangement is responsible for the PLSS system.

 Above is an example of the PLSS grid as applied to public lands. Lots are numbered from west to east and then east to west in next row down.
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