Fig. 7
From: A crowdsourced global data set for validating built-up surface layers

Global distribution of the sample points where imagery is missing, low resolution or cloud-covered, displayed as the total by 100 km2 pixels.
From: A crowdsourced global data set for validating built-up surface layers

Global distribution of the sample points where imagery is missing, low resolution or cloud-covered, displayed as the total by 100 km2 pixels.