What is one criterion for SDTS standards regarding raster accuracy?

The criterion regarding raster accuracy within the Spatial Data Transfer Standard (SDTS) is best represented by the requirement for a comparison against an independent higher accuracy source. This criterion is essential because it ensures that the raster data being evaluated is measured against a benchmark that is recognized for its accuracy. By using an independent source, it reinforces the reliability of the accuracy assessment and can help identify discrepancies in the raster data.

Utilizing a higher accuracy source for comparison provides a methodological approach to validating raster data. It allows for an objective evaluation, helping to confirm that the data fits within acceptable accuracy limits rather than relying solely on internal measurements or subjective assessments. This practice can also aid in identifying any systematic errors that may not be evident when solely evaluating the data itself.

Other potential methods, such as relying on a limited number of checkpoints or emphasizing visual inspections, do not provide the same level of rigorous validation needed for accuracy assessment. Therefore, ensuring a comparison against an independent, higher accuracy source is crucial in establishing robust raster accuracy criteria in accordance with SDTS standards.