Scatter plot between derived network area and the total area (on the image plane) of the 55 considered quiet-Sun magnetograms for a network threshold of |B_z|> 200 G. The dashed line shows the best linear fit (y = A + Bx) between the network area (x) and the total area (y). A similar linear monotonic dependence holds for the other two network thresholds (100 G, 300 G) considered in this analysis with respective linear fit coefficients (A,B) equal to (2177.41, 11.13) and (3288.36, 37.9). The linear fit coefficients (A,B) between network and total area measured on the heliographic plane for the network thresholds (100 G, 200 G, 300 G) are equal to (2337.97, 11.17), (3569.72, 23.95), and (3463.81, 38.73).