Final answer:
An assessor's map must be an official record to legally describe a property in a deed, particularly in regions using metes and bounds for property division.
Step-by-step explanation:
An assessor's map may not be used to legally describe a property in a deed unless the map has been recorded or referenced in government records as an official source of property descriptions. In regions that use the metes and bounds system, accurate descriptions are vital because of the irregularity of land division.
This method relies on physical features and dimensions that can change over time, such as trees, rocks, and streams. Hence, when using an assessor's map for a legal description, it must conform to legal standards for property description and have legal authority, which often means being part of the public record.