| Plat Books are an
excellent source to obtain section and quarter-section information needed to
process your locate request. These sources give tier, range and
section information and are available for every county in the state of
Illinois. Quarter sections are easy to determine using the section
boundaries.
How can I determine what the
section number is?
Each section number is clearly marked on the township page in the center of
each section (see illustration below).
What are tier and range numbers?
These numbers represent Township and Range and are indicated at the top of
each Township page (see illustration below).
How do I read my plat book?
The illustration below is a simplified example of how to read a plat book.
In addition, each county plat book contains detailed instructions regarding
this procedure.
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