Since the names dont seem to be changing anytime soon, heres all the map codes.
Echerion = mp_skirmish_map_010
Trading post = Mp_skirmish_map_003_skinc
Port at Omur = mp_skirmish_map_008_skin
Town Outskirts = mp_skirmish_map_002f
Xauna = mp_skirmish_007
Echerion = mp_skirmish_map_010
Trading post = Mp_skirmish_map_003_skinc
Port at Omur = mp_skirmish_map_008_skin
Town Outskirts = mp_skirmish_map_002f
Xauna = mp_skirmish_007