Ports a large chunk of the map datum system that europa/bay uses.

Links many map-specific details such as the station name, z-level information, and allowed jobs from global vars to map datum vars, which should help us maintain multiple maps at once in the future, which will be needed for the future Southern Cross.
Note that a config change will be needed to change GENERATE_ASTEROID to GENERATE_MAP, otherwise no changes should be required to continue normal map usage.
To change to a different map, it's suggested to tick the file that ticks all the other needed files, which for the Northern Star is called northern_star.dm.

code/modules/shuttles/shuttle_emergency.dm

@@ -26,11 +26,12 @@
 
 	if (origin == area_station)	//leaving the station
 		emergency_shuttle.departed = 1
+		var/estimated_time = round(emergency_shuttle.estimate_arrival_time()/60,1)
 
 		if (emergency_shuttle.evac)
-			priority_announcement.Announce("The Emergency Shuttle has left the station. Estimate [round(emergency_shuttle.estimate_arrival_time()/60,1)] minutes until the shuttle docks at [dock_name].")
+			priority_announcement.Announce(replacetext(replacetext(using_map.emergency_shuttle_leaving_dock, "%dock_name%", "[using_map.dock_name]"),  "%ETD%", "[estimated_time] minute\s"))
 		else
-			priority_announcement.Announce("The Scheduled Transfer Shuttle has left the station. Estimate [round(emergency_shuttle.estimate_arrival_time()/60,1)] minutes until the shuttle docks at [dock_name].")
+			priority_announcement.Announce(replacetext(replacetext(using_map.shuttle_leaving_dock, "%dock_name%", "[using_map.dock_name]"),  "%ETD%", "[estimated_time] minute\s"))
 
 /datum/shuttle/ferry/emergency/can_launch(var/user)
 	if (istype(user, /obj/machinery/computer/shuttle_control/emergency))
@@ -183,9 +184,9 @@
 			if (shuttle.in_use)
 				shuttle_status = "Busy."
 			else if (!shuttle.location)
-				shuttle_status = "Standing-by at [station_name]."
+				shuttle_status = "Standing-by at [station_name()]."
 			else
-				shuttle_status = "Standing-by at [dock_name]."
+				shuttle_status = "Standing-by at [using_map.dock_name]."
 		if(WAIT_LAUNCH, FORCE_LAUNCH)
 			shuttle_status = "Shuttle has recieved command and will depart shortly."
 		if(WAIT_ARRIVE)

code/modules/shuttles/shuttle_specops.dm

@@ -62,7 +62,7 @@
 		var/obj/machinery/computer/C = user
 
 		if(world.time <= reset_time)
-			C.visible_message("\blue [boss_name] will not allow the Special Operations shuttle to launch yet.")
+			C.visible_message("\blue [using_map.boss_name] will not allow the Special Operations shuttle to launch yet.")
 			if (((world.time - reset_time)/10) > 60)
 				C.visible_message("\blue [-((world.time - reset_time)/10)/60] minutes remain!")
 			else
@@ -88,18 +88,18 @@
 
 /datum/shuttle/ferry/multidock/specops/move(var/area/origin,var/area/destination)
 	..(origin, destination)
-	
+
 	spawn(20)
 		if (!location)	//just arrived home
 			for(var/turf/T in get_area_turfs(destination))
 				var/mob/M = locate(/mob) in T
-				M << "<span class='danger'>You have arrived at [boss_name]. Operation has ended!</span>"
+				M << "<span class='danger'>You have arrived at [using_map.boss_name]. Operation has ended!</span>"
 		else	//just left for the station
 			launch_mauraders()
 			for(var/turf/T in get_area_turfs(destination))
 				var/mob/M = locate(/mob) in T
-				M << "<span class='danger'>You have arrived at [station_name]. Commence operation!</span>"
-				
+				M << "<span class='danger'>You have arrived at [station_name()]. Commence operation!</span>"
+
 				var/obj/machinery/light/small/readylight/light = locate() in T
 				if(light) light.set_state(1)
 

code/modules/shuttles/shuttles_multi.dm

@@ -59,14 +59,14 @@
 	if(cloaked || isnull(departure_message))
 		return
 
-	command_announcement.Announce(departure_message,(announcer ? announcer : "[boss_name]"))
+	command_announcement.Announce(departure_message,(announcer ? announcer : "[using_map.boss_name]"))
 
 /datum/shuttle/multi_shuttle/proc/announce_arrival()
 
 	if(cloaked || isnull(arrival_message))
 		return
 
-	command_announcement.Announce(arrival_message,(announcer ? announcer : "[boss_name]"))
+	command_announcement.Announce(arrival_message,(announcer ? announcer : "[using_map.boss_name]"))
 
 
 /obj/machinery/computer/shuttle_control/multi