guide to writing a farm map

We are in the process of writing a "Guide to Writing a Farm Map".  I am
wondering if such a document exists already.  If anyone knows of such a
guide, please let me know.  Thanks.

    Carol A. Miles, Ph.D.
    Washington State University
    Extension Agricultural Systems
    360 NW North Street
    Chehalis, WA   98532
    PHONE 360-740-1295   FAX 360-740-2792