Madsen Land Surveying, Inc.
Providing quality land surveying services since 1979.

 

   

  

Subdivision Platting

Subdivision platting is the process by which a large area of land is divided into several smaller areas called lots and blocks.  In addition to lots and blocks, part of the land is also usually dedicated to the governing body as public right of way (usually streets and alleys).

Subdivision platting is a relatively lengthy process, and generally begins with a boundary survey of the tract of land which is to be divided and platted.  After the boundary survey is completed, a topographic survey usually follows, in order to determine the relief of the land and to show other features that will be important during the planning phase.

Once the boundaries have been determined and the relief and other features have been identified, the planning process begins.  The planning process is when the size, shape, and number of the lots is determined, and the initial proposed layouts are submitted to various governing entities (county commissioners, city councils, etc.) for approval.

Upon approval of the preliminary plat, the final designed layout is staked in the field, and the official plat is drawn.  Once all of the interested parties have signed the plat, and the finalized version has been approved, the plat is recorded and goes into effect.

Plat

  

How to read bearings and azimuths.

Azimuth Circle

 

Typical section breakdown format.

Section

 

Some handy length conversions.

1 mile = 5280 ft = 80 chains

1/2 mile = 2640 ft = 40 chains

1/4 mile = 1320 ft = 20 chains

1 chain = 4 rods = 66 feet

1 rod = 16.5 feet

1/4 mile = 80 rods

1 meter = 3.2808 feet

Approximate aliquot part areas of a typical section.

1 Section = 640 acres

1/2 Section = 320 acres

1/4 Section = 160 acres

1/8 Section = 80 acres

1/16 section = 40 acres