Fig. 7.

Underlying drivers of uncertainty. The percent relative difference between the model ACD and the median estimated ACD error across a all systematic sampling grids and b all stratified random sampling plot sets (see ‘‘Methods’’ section), plotted against each non-binned stratum at the 1-ha scale. Plots are composed of a randomly selected 10 % of the total dataset (approximately 7.6 million hectares), with the point density color scale on a square root transformation for plotting clarity. Horizontal dashed black lines show the 10 % accuracy range