“…Hobson et al, 2010;Muhlfeld et al, 2012;Song et al, 2014;Chesson et al, 2018;Colleter et al, 2021;Lazzerini et al, 2021). So far, national isoscapes have been produced for several European and extra-European countries, employing and testing several different methods for the spatial interpolation, including machine learning (Montgomery et al, 2006;Evans et al, 2010;Frei and Frei, 2011;Bataille and Bowen, 2012;Pestle et al, 2013;Hartman and Richards, 2014;Copeland et al, 2016;Kootker et al, 2016;Laffoon et al, 2017;Bataille et al, 2018;Hedman et al, 2018;Willmes et al, 2018;Adams et al, 2019;Ladegaard-Pedersen et al, 2020;Scaffidi and Knudson, 2020;Snoeck et al, 2020;Wang and Tang, 2020;Frank et al, 2021;Funck et al, 2021;Washburn et al, 2021;Zieliński et al, 2021).…”