What must be added to a drawing if a surveyor revises it?

When a surveyor revises a drawing, it is vital to add the date of the revision. This serves multiple purposes in the context of land surveying. Firstly, it provides a clear timeline of the modifications made to the drawing, which is essential for maintaining an accurate historical record of the document. This aspect is crucial, especially when discrepancies or questions arise regarding the changes, allowing stakeholders to see which version of the drawing is current and which earlier versions exist.

Moreover, the date indicates to all parties involved, including clients, regulatory bodies, and future surveyors, when the revisions occurred, contributing to the overall transparency of the survey process. This is particularly important in legal contexts where the validity and relevance of the survey document may impact property transactions or boundary disputes.

In contrast, while other options like a summary of changes made, the surveyor's signature, and a description of the property are important aspects of a survey drawing, they do not specifically address the immediate necessity tied to revisions. Each of those elements serves its purpose but is not primarily focused on indicating the timeliness and revision history of the drawing.