According to FGDC standards, what is the minimum amount of points required to check each dataset?

The minimum amount of points required to check each dataset, according to FGDC standards, is set at 20 check points. This standard is established to ensure a robust accuracy assessment of geospatial data. By using 20 check points, practitioners can effectively measure the positional accuracy of datasets, providing a balance between statistical reliability and practical applicability.

This number allows for a sufficient sample size that can offer insights into the dataset's precision and help identify any significant errors or anomalies. It is a guideline that enhances the credibility and reliability of geospatial analyses, which is essential in various applications, from urban planning to environmental monitoring.

Choosing a number lower than 20 check points may not provide a comprehensive assessment of the dataset's accuracy, while going higher could lead to unnecessary complexity or resource expenditure beyond what is typically required for validation. Thus, the standard of 20 strikes an appropriate balance for effective dataset verification in GIS practices.