Ground of Aces Modding
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Mission locations

Every mission happens somewhere. A mission lists the places it can appear, and the game picks one when the mission is created. It draws one, and re-draws up to five more times if that spot is already used by a live mission; if every re-draw comes up taken it keeps the last one, so two live missions can end up sharing a location.

Distance is not decoration: the fuel a flight costs is worked out from the great-circle distance between the location and the loaded map's own coordinates, multiplied by FuelConsumptionPerKilometer from the Variables table, so a mission over Berlin is far more expensive to fly than one over the Channel.

If a mission lists no locations at all, the game falls back to a random one from the list below.

Using a location

In the Mission Editor, open the Locations section, pick a place from the dropdown and add it. Add as many as you like; the same place cannot be added twice.

In a mission .json, each entry of _potentialLocations looks like this:

{
"_locationId": "dover",
"_locationName": "dover",
"_coordinates": { "x": 51.13512, "y": 1.312756 },
"_flags": 4
}
  • x is latitude, y is longitude.
  • _locationName is the only field the game reads at runtime. _locationId is informational - keep it identical to the name.
  • _flags must be a number (the file is read with Unity's JSON reader, so "Sea" is not accepted). See the next section for what it does and does not do.

The name doubles as the identifier the game uses to tell whether a spot is already occupied, so the game avoids placing two live missions on the same name where it can (see the re-draw rule above).

A mission created from a script can be placed with missions_api.SetMissionLocation(mission_entity_id, location_name). It accepts only a name from the list below, never coordinates of your own; without a location a script-only mission sits at the map origin.

Location flags

Value Name Meaning
0 None none
1 Land over land
2 Sea over the sea
4 OwnTerritory over friendly territory
8 EnemyTerritory over enemy territory

They combine, so 10 is Sea + Enemy territory - the most common value for a coastal target on the far side of the Channel.

Warning
The _flags value in a mission file is kept for completeness, but the game does not read it. Every shipped mission leaves it at 0. Quest conditions such as "fly a mission over the sea" look the mission's location name up in the list below and use the flags recorded there: the quest step writes the flag name, not the number - location,sea, location,ownterritory, location,enemyterritory (see Quests). A location name that is not on the list passes every location condition automatically. No shipped location carries Land, so a location,land condition can never be met.

The locations that ship with the game

82 places are predefined. Reuse them rather than inventing coordinates: they are positioned to line up with the war map, and the player will recognise them.

Latitude runs from 44.87 to 60.38, longitude from -9.00 to 14.55.

Name Latitude Longitude Flags
aarhus 56.1509 10.1799 Enemy
amiens 49.8980 2.3286 Enemy
amsterdam 52.3713 4.8995 Sea + Enemy
arras 50.2933 2.7758 Enemy
atlantic_ocean 56.5000 -9.0000 Sea
bergen 60.3829 5.3042 Sea + Enemy
berlin 52.5217 13.3958 Enemy
birmingham 52.4907 -1.8466 Own
bordeaux 44.8695 -0.5592 Sea + Enemy
boulogne-sur-mer 50.7246 1.6019 Sea + Enemy
bremen 53.0869 8.7973 Enemy
bremerhaven 53.5352 8.5838 Sea + Enemy
brest 48.3912 -4.4851 Sea + Enemy
bristol_channel 51.3681 -4.2301 Sea
brussels 50.8552 4.3559 Enemy
caen 49.1857 -0.3894 Sea + Enemy
calais 50.9587 1.8552 Sea + Enemy
cambridge 52.1925 0.1337 Own
canterbury 51.2733 1.0855 Own
cardigan_bay 52.5000 -4.6000 Sea
celtic_sea 50.8000 -7.5000 Sea
chelmsford 51.7352 0.4673 Own
cologne 50.9375 6.9517 Enemy
compiegne 49.3991 2.8277 Enemy
dedham_vale 51.9878 0.9096 Own
dieppe 49.9189 1.0747 Sea + Enemy
dogger_bank 54.9952 3.0143 Sea
dorchester 50.7106 -2.4410 Own
dover_strait 51.0598 1.5825 Sea
dover 51.1351 1.3128 Own
dunkirk_bay 51.3082 2.1831 Sea
dunkirk 51.0370 2.3788 Sea + Enemy
eastbourne_bay 50.6432 0.4435 Sea
eindhoven 51.4497 5.3770 Enemy
english_channel 50.1660 -1.7013 Sea
essen 51.4535 7.0060 Enemy
frankfurt 50.1028 8.6791 Enemy
great_yarmouth_bay 52.5492 2.2980 Sea
guernsey 49.4438 -2.5571 Sea
hamburg 53.5381 9.9669 Sea + Enemy
hanover 52.3736 9.7400 Enemy
hardangervidda 60.0327 7.4297 Enemy
high_weald 51.0563 0.4398 Own
ipswich 52.0524 1.1532 Own
irish_sea 53.5000 -4.8000 Sea
kassel 51.3127 9.4948 Enemy
krefeld 51.3394 6.5521 Enemy
kristiansand 58.1581 7.9766 Sea + Enemy
la_rochelle 46.1597 -1.1592 Sea + Enemy
lannion 48.7372 -3.4625 Sea + Enemy
le_havre 49.5003 0.1352 Sea + Enemy
leeuwarden 53.2037 5.7917 Sea + Enemy
liege 50.6413 5.5752 Enemy
lille 50.6252 3.0551 Enemy
london 51.5090 -0.1280 Own
maastricht 50.8474 5.6870 Enemy
maidstone 51.2707 0.5203 Own
malvern_hills 52.1034 -2.3512 Own
metz 48.9610 6.1310 Enemy
munster 51.9645 7.6099 Enemy
nancy 48.6921 6.1844 Enemy
nantes 47.2216 -1.5501 Enemy
north_channel 55.1000 -5.6000 Sea
north_sea 56.5000 3.5000 Sea
north_wessex 51.4482 -1.4938 Own
outer_silver_pit 54.0262 2.0864 Sea
paris 48.8535 2.3188 Enemy
raf_duxford 52.0933 0.1311 Own
raf_filton 51.5218 -2.5746 Own
raf_manston 51.3461 1.3490 Own
raf_tangmere 50.8464 -0.7095 Own
reims 49.2570 4.0438 Enemy
rotterdam_bay 51.9939 3.1666 Sea
rotterdam 51.9302 4.4752 Sea + Enemy
rouen 49.4381 1.0937 Enemy
seine_bay 49.7154 -0.6720 Sea
south_downs 50.9450 -0.6643 Own
st_georges_channel 52.0000 -5.8000 Sea
stettin 53.4282 14.5511 Sea + Enemy
telemark 59.3766 8.3060 Enemy
the_wash 52.9159 0.2530 Sea
tours 47.3933 0.6825 Enemy

Two further entries exist in the game's list but are development leftovers - do not use them: test1 (id test), and one named ireland whose id is test123.

Using your own coordinates

Nothing stops a mission from naming a place that is not on the list. The coordinates live in the mission's own file, not in a shared table, so you can put a mission anywhere. Coordinates and name are yours; the flags a quest condition sees are not - they come from the shipped list by name (see above), so a place of your own matches every location condition.

The war map shows latitude 40.75 to 61.25 and longitude -11.75 to 21.64 (a Mercator projection). The range of the shipped places above is simply where they happen to be, not the map's limit. A location outside the map's box still works - distance and fuel are just maths - but its marker is clamped to the nearest edge of the map, so the player sees it at the border rather than where it really is. It stays clickable.