Orthographic projections in Galactic coordinates. Longitude zero is marked by the vertical thick lines. The Galactic poles are at the center of each disk. Galactic longitude increases counter-clockwise in the northern hemisphere (left) and clockwise in the southern one (right). We show the maps of the effective number of clouds (top) and the map of Δ(θ_IVC, θ_LVC) used in ‘Implementation 1’ (second row). We also show the map of sky positions of pixel samples from ‘Implementation 1’ and ‘Implementation 2’ (bottom). White pixels are both in target1 and target2 samples. Green pixels are target2 pixels not found in target1 and purple pixels are target1 pixels not found in target2. Red pixels belong to the control sample. Black pixels are those that belong to all, but neither to control nor to target1 or target2.