A number officially assigned to a Land Unit for identification purposes. In the Congressional Township and Range Survey System, Land Units are sections with numbers range from 1-36. Other Land Unit Types may be identified with numbers, names with numbers, or names alone.
In addition to Land Units that are designated as Sections within the Congressional Township and Range System, Indiana contains tracts of land which were surveyed prior to the congressional surveys of 1807. These tracts were grouped into different types of Land Units based on the particular survey in which they were determined. Individual parcels of land within each of these tracts are identified by their Land Unit Type plus a number (Land Number) and/or name (Land Unit Name).
In some areas, original land surveys or other documents indicate that the Land Unit lines shown on USGS topographic maps are incorrectly placed, or that the Land Numbers are incorrect. In such cases, the corrected lines or numbers are used by the Subsurface Section of the IGS to describe well locations and to file documents for wells. Corrections have been made to descriptions contained in the PDMS.
Frankly, some of these revisions were arbitrary or even wrong. This should be addressed when time permits (4/7/2010).
Caution. This means that some Land Unit Numbers may differ from those posted on some external documents.