Uncertainty of the reconstruction of this paper derived from posterior samples (first row) and of the reconstruction of Green et al. (2018) (second row), both in the sky projection. The uncertainties are in the same units as the corresponding maps in Fig. 8, while the logarithmic uncertainties are dimensionless. First column: variance for the dust extinction and second column: variance of the logarithmic projected dust density on a natural log-scale, which can be interpreted as a relative error.