Product Accuracy, Positional Accuracy and the Rolling Shutter

Qassim Abdullah, Woolpert vice president and chief scientist, answers questions on technical theory and the practical applications of mapping and GIS in his monthly Mapping Matters column for the PE&RS Journal.

In this month’s edition, Abdullah responds to a reader’s query about why RMSE figures from aerial triangulation should not be used alone as proof of product accuracy and why the rolling shutter on a UAS-mounted camera can cause imagery to blur. “If the effect of the rolling shutter is not addressed during data processing, the positional accuracy of the product will be compromised.”

His column is below, courtesy of PE&RS. For more from PE&RS, visit