Dear all,
I'm trying to overlay EU NUTS2 and NUTS3 using spmap, but the polygon option doesn't combine two graphs and is seperating them. Could anyone suggest what to do, please? Many thanks.

use "NUTS_RG_20M_2021_3035.dta", clear /// NUTS3

merge 1:1 NUTS3 using "sector_data_by_NUTS3.dta" /// merge with sector level data by NUTS3
keep if _m == 3
drop _m

* Polygon
spmap green_share_emp using "NUTS_RG_20M_2021_3035_shp.dta", id(_ID) fcolor(Blues2) clnumber(4) polygon(data("nuts2coord_Germany.dta") ocolor(black))

Array