What is the minimum closure error for an Urban Class A survey?

In Oklahoma, Urban Class A surveys are subject to specific standards that ensure a high level of precision in the measurement and mapping of land. The minimum closure error for such surveys is defined as 1:15,000. This means that for every 15,000 units of horizontal distance measured, the allowable error in the survey’s closure is one unit.

This rigorous standard is set to accommodate the complexities often encountered in urban environments, where structures, properties, and infrastructure may be closely packed and require precise delineation to avoid disputes, ensure compliance with zoning laws, and facilitate proper land use. The requirement for a 1:15,000 closure error reflects the importance of accuracy in these settings, ensuring that boundaries and property lines are reliably established. The intent behind this standard is to uphold the integrity of land surveys in urban settings where errors could lead to significant legal and financial implications.

In contrast, other options represent less stringent standards that might apply to different classifications of surveys, thus making them unsuitable for an Urban Class A survey. The high closure standard is essential for maintaining the quality and reliability of land surveying in densely populated areas.