CST Level 1 Land Surveyor Certification Practice

The National Spatial Reference System (NSRS) control points are classified based on what?

1. Order of accuracy

2. Geographic location

3. The agency that created them

4. The date when they were established

The correct answer is: Order of accuracy

The classification of National Spatial Reference System (NSRS) control points is based on the order of accuracy. This system categorizes control points to indicate the level of precision and reliability of the measurements associated with each point. Higher-order control points typically have more precise and accurate positional information, which is essential for various applications in surveying, mapping, and geospatial analysis. Understanding the order of accuracy is crucial for surveyors and engineers when selecting reference points for their projects since the accuracy requirements can vary significantly based on the nature of the work being conducted. For instance, high-accuracy points may be required for detailed engineering projects, while lower accuracy may suffice for general mapping purposes. This classification ensures that professionals can choose appropriate references that meet their specific accuracy needs for land surveys and geospatial data collection. The other classifications such as geographic location, the agency that created them, or the date of establishment are not primary factors for categorizing the control points in the NSRS, as they do not directly pertain to the precision and dependability of spatial data for reliable surveying practices.