Table 1.

The framework of mapping annual Human Footprint at the global scale as illustrated in Williams et al.¹⁸.

Pressure	Score	Details
Built environment	0,4,10	The pressure score for pixels with urban fractions above 20% was assigned as 10; otherwise, it was assigned as 4.
Population density	0–10	$\left\{\begin{array}{c}10,population\left(P\right)\ge 1000\hfill \\ 3.333\times \log \left(P+1\right),0<P<1000\hfill \end{array}\right)$
Night-time lights	0–10	Assigned from 0 to 10 according to intervals determined by ten equal quantiles
Croplands	0,4,7	The pressure score for pixels with crop fraction above 20% was assigned as 7; otherwise, it was assigned as 4.
Pasture	0–4	Fraction of pasture in each grid multiplied by 4
Roads	0–8	$\left\{\begin{array}{c}8,distance\left(D\right)\le 0.5\hfill \\ 3.75\times \exp \left(-1\times \left(D-1\right)\right)+0.25,0.5<D<15\hfill \end{array}\right)$
Railways	0,8	$\left\{\begin{array}{c}0,distance\left(D\right)>0.5\hfill \\ 8,D\le 0.5\hfill \end{array}\right)$
Navigable waterways	0–4	$\left\{\begin{array}{c}0,distance\left(D\right)>15\hfill \\ 4\times \exp \left(-1\times D\right),D<15\hfill \end{array}\right)$