Which term describes 'any exclusively identifiable physical object whose spatial relationship to the corner is recorded'?

The term that best describes 'any exclusively identifiable physical object whose spatial relationship to the corner is recorded' is "Accessory to a corner." In land surveying, accessories to a corner refer to tangible objects that are placed at or near survey corners to help establish the precise location of the corner. These accessories can include items like monuments, pipes, or other physical markers that are documented in a survey for reference.

The inclusion of these identifiable objects is essential, as they provide additional context and verification of the corner's location, enhancing the overall accuracy of the survey. The relationship between the accessory and the corner is critical because it helps surveyors and future landowners understand how the corner is situated in relation to the surrounding environment and property boundaries.

In contrast, terms like boundary mark or survey marker refer more generally to any markers indicating boundary lines or corners without the specific emphasis on their documented spatial relationship to a corner. A corner record typically refers to the documentation itself outlining the details of the corner and its accessories rather than the accessories in physical form.