Variation partitioning using latitude and longitude as explanatory variables

Question

[ieie]

am using the varpart function present in the vegan package. this is my script:

`CR_all.fun_var_part <- varpart(all_fungi, ~ age, ~ lat +long, data = Cr_var)

CR_all.fun_var_part

plot(CR_all.fun_var_part, digits=2)`

my response variable, all fungi, was the abundance matrix which I transformed with the hellinger method. age (X1) represents the different ages of my forests which I scaled with scale function. if I want to use my GPS coordinates as X2 how should I treat them?should I transform them? How should the script for the varpart function be? I hope my question was not too vague and I thank everyone for any help.