No one has drawn a map, it's coded using hidden_resources, both to constrain availability of governments and build region-specific recruitment, which includes deliberately not having recruitment in particular places. These are the recruitment headings from Seleukid factional governments:
Code:
;;; CAUCASUS
;;; EASTERN
;;; ASAAK/HEKATOMPYLOS
;;; CHARACENE
;;; IOUDAIA
;;; BAKTRIA
;;; ANATOLIAN
;;; GALATIA
;;; EGYPT
Those are the regions they get local levies from their governments.
You can put a polis (but not a colony) in Britain, but it will give you a tiny pool of Greeks. This is the "marginal places" pool in the polis_one:
Code:
;;; SAKA/INDIA/DAHA/GERMANIA/BALTIC/NUMIDIA/DACIA/LUSITANIA/BRITAIN/CELTIBERIA/ETHIOPIA 4 * 0.03
recruit_pool "hellenistic infantry hoplitai haploi" 1 0.03 1 0 requires factions { cul_1, cul_3, f_pontos, } and not hidden_resource eastern and not hidden_resource greek1 and not hidden_resource greek2 and not hidden_resource pontic and hidden_resource baltic or hidden_resource belgic or hidden_resource briton or hidden_resource celtiberia or hidden_resource daha or hidden_resource ethiopia or hidden_resource dacia or hidden_resource germania or hidden_resource indo or hidden_resource lusitan or hidden_resource saka
recruit_pool "hellenistic infantry akontistai" 1 0.06 2 0 requires factions { cul_1, cul_3, f_pontos, } and not event_counter ecThorakitaiReform 1 and not hidden_resource eastern and not hidden_resource greek1 and not hidden_resource greek2 and not hidden_resource pontic and hidden_resource baltic or hidden_resource belgic or hidden_resource briton or hidden_resource celtiberia or hidden_resource daha or hidden_resource ethiopia or hidden_resource dacia or hidden_resource germania or hidden_resource indo or hidden_resource lusitan or hidden_resource saka
recruit_pool "hellenistic infantry akontistai" 1 0.03 1 0 requires factions { cul_1, cul_3, f_pontos, } and event_counter ecThorakitaiReform 1 and not hidden_resource eastern and not hidden_resource greek1 and not hidden_resource greek2 and not hidden_resource pontic and hidden_resource baltic or hidden_resource belgic or hidden_resource briton or hidden_resource celtiberia or hidden_resource daha or hidden_resource ethiopia or hidden_resource dacia or hidden_resource germania or hidden_resource indo or hidden_resource lusitan or hidden_resource saka
recruit_pool "hellenistic infantry toxotai" 1 0.03 1 0 requires factions { cul_1, cul_3, f_pontos, } and not hidden_resource hellen1 and not hidden_resource eastern and not hidden_resource greek1 and not hidden_resource greek2 and not hidden_resource pontic and hidden_resource baltic or hidden_resource belgic or hidden_resource briton or hidden_resource celtiberia or hidden_resource daha or hidden_resource ethiopia or hidden_resource dacia or hidden_resource germania or hidden_resource indo or hidden_resource lusitan or hidden_resource saka
Allied Governments convert to 15% or 25% "Independent" culture. Otherwise they will convert over time towards your culture as well.