What must surveys made at the same time in a block system suffer from according to Turner V. Smith?

In the context of Turner v. Smith, the concept that surveys made at the same time in a block system must suffer from a deficiency in the same proportion addresses the inherent challenges in land surveying and property assessments. This principle acknowledges that when multiple surveys are conducted simultaneously within the same geographical block, there are limitations to the accuracy and precision of these surveys due to shared variables, standard methods of measuring, and potential external influencing factors.

By stating that these surveys suffer from deficiency in the same proportion, it implies that any measurement error or deficiency experienced in one survey will likely reflect similarly in others conducted at the same time. This creates an understanding that the proportionality of any detected deficiency can help establish consistency and comparability among the various surveys within that block system. This emphasizes the importance of maintaining accuracy and accountability in surveying practices, as well as the need for standardization in methodologies to address the risks of collective deficiencies.

This concept is crucial for surveying professionals who must account for these potential shortcomings when assessing land parcels, ensuring that any such deficiencies are recognized and mitigated wherever possible.