According to the text, what must be presented on the Survey Map or Survey Plat regarding the nature of the survey performed?

The correct answer emphasizes the importance of clarifying whether the survey was based on other sources. When presenting a Survey Map or Survey Plat, it is crucial to inform the users of the survey about the origin of the data and methods employed. This transparency can significantly affect how the results are interpreted and used, as it provides critical context about the reliability and limitations of the survey information. If the survey is derived from prior records or previous surveys, disclosing that allows others to assess the potential for inaccuracies or assumptions made during the survey process.

Other aspects, such as the purpose and scope of the survey, while relevant, do not take precedence over revealing the sources that inform the survey's findings. The estimated time to completion and details about the equipment used are also less critical to properly understanding the nature of the survey. They do not provide the foundational context necessary to evaluate the integrity and validity of the survey results, which is why the focus should be on clarifications regarding data sources.