Figure 8. Comparison of MBARS results, G-H method results (solid lines), N-M method conservative results (squares), and manual results (dashed lines) in test areas A (yellow colors) and B (blue colors). Best-fit RA lines are included for areas A (220%) and B (37%). G-H method results and definitions of area A and B were taken from prior publications (Golombek et al., 2008) and shown in Fig. 9. The MBARS results presented are the best fit to the manual results in areas A and B. The N-M method overestimates the boulder population in both areas even in the conservative (low) results, so the liberal (higher) results are excluded. MBARS and the G-H method are more comparable in both areas. Area B, which has a less-dense boulder population than A, shows closer agreement to MBARS results.