Making better use of accuracy data in land change studies: Estimating accuracy and area and quantifying uncertainty using stratified estimation

► Mapped areas of change are often biased because of classification errors. ► Confidence intervals for change areas need to be provided to quantify this uncertainty. ► Impact of area uncertainty on terrestrial carbon flux was found to be substantial. ► Land change studies often inadequately report accuracy and uncertainty. ► Recommendations are given for how to report and use accuracy information.