Fig. 7
Comparison of terrestrial laser scanning (TLS) heights against available reference datasets acquired by airborne laser scanning (ALS) and GNSS. (a) Boxplot of the height difference between the TLS and ALS measurements as a function of the TLS scan range. The box indicates the first quartile, median (red line) and third quartile of values with minimum and maximum indicated by the error bar. Outliers are indicated by red points. (b) Boxplot of the height differences between the TLS-based height and GNSS measurements of the surface as a function of scan range.
