One of the most important components of a Geographic
Information System (GIS) is an accurate map delineating land parcel ownership.
Many states have strict requirements for this mapping, as an accurate
cadastral map is commonly a primary tool in the assessment of land values
for tax purposes. In a digital format and linked to an assessment database,
the GIS user can quickly query a variety of features. The quality of this
mapping affects the confidence the user has in analysis results. Good
decisions are based on good data.
 A "parcel map" is a legal mechanism to subdivide real property
into smaller parcels. In certain circumstances, there is a limit to
the number of parcels that can be created by using the parcel map process.
Typically, a maximum of four (4) residential parcels can be created
with a parcel map. Consequently, the required improvements to the infrastructure
are considerably less than that required of larger projects.
The parcel map process is typically used by landowners who are not "developers," but
who happen to have a large piece of property and desire to create smaller
parcels. A landowner can only use the parcel map process once, in most
circumstances, otherwise future divisions of the same or adjacent property
by the same property owner will require a tract map
The cadastral map has four main purposes:
- Provides a cartographic record of official and sometimes private
land surveys and subdivisions.
- Facilitates the administration and transfer of Crown Lands.
- Records land ownership.
- Assists in the valuation and taxation of land
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