I did two things: look.
edit city.txt
[Area 50]
area_name=myLocationName
world_pos=270,90
start_state=Off
;lock_state=on
size=Small
townmap_art_idx=-1
townmap_label_art_idx=-1
entrance_0=On,130,410,startMap,-1,-1,0
and add this slice of code to some map
procedure...