(c) Bearing and distance source data used may include but are not limited to:

1. (1) Legal descriptions;
2. (2) Subdivision plats; and
3. (3) Plats of survey.

(e)

1. (1) Coordinate geometry (COGO) should be implemented as much as possible to ensure consistency between:

   1. (A) Recorded instruments;
   2. (B) Other available digital maps; and
   3. (C) The base map.

2. (2) Although coordinate geometry is usually regarded as the most accurate method of base map construction, it is sound practice to integrate the COGO work with existing reliable digital sources to:

   1. (A) Ensure accuracy and consistency; and
   2. (B) Minimize the expense and effort of the duplication of existing digital work. (f)(1) When inconsistencies between the property records and other mapping sources, i.e., photo evidence, appear, a thorough investigation should be initiated to discover all the relevant evidence to make the judgment for locating the element on the map accurately.
3. (2) The recorded instrument remains the authoritative record upon which all property valuations must rely.
4. (3) If the record conflicts with the evidence of the map, the recourse for the cadastral mapping specialist is to identify the discrepancy for reconciliation by the proper authorized parties.