Add an Antarctica map 🐧 (#3740)

## Description:

(re-submission of older PR because the old one had too many merge
conflicts)

Re-adds and reworks the previously April Fools "Reglaciated Antarctica"
as a new map, this time with proper elevation data: Map of Antarctica
centered in the South Pole.

The "appeal" of this a map is that it has no green terrain. (As such it
has a really low rotation number (of 1). )

This also completes the Continental map category (antarctica was the
only continent out of the traditional 7 missing).


https://github.com/user-attachments/assets/28302464-c533-483e-8a1b-2699093921ff

The base map image is a composite of 2 relief maps from 2 different
sources, both properly credited

## Please complete the following:

- [x] I have added screenshots for all UI updates
- [x] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [x] I have added relevant tests to the test directory
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced

## Please put your Discord username so you can be contacted if a bug or
regression is found:

tri.star1011

Co-authored-by: iamlewis <lewismmmm@gmail.com>

CREDITS.md

@@ -86,6 +86,14 @@ Ernie Wright (USRA) ORCID logo.
 Scientist
 Noah Petro (NASA/GSFC) ORCID logo.
 
+### Antarctica Map
+
+Polar Geospatial Center, 2018, "PGC Map Catalog", https://doi.org/10.7910/DVN/6R8F7U, Harvard Dataverse, V1, [2364], [Apr-02-2026].
+[Terms of Use](https://www.pgc.umn.edu/guides/user-services/acknowledgement-policy/)
+
+[U.S. Geological Survey](https://earthexplorer.usgs.gov/metadata/4980/GT30ANTARCPS/)
+[Public Domain](https://www.doi.gov/copyright)
+
 ## Icons
 
 ### [The Noun Project](https://thenounproject.com/)

map-generator/assets/maps/antarctica/info.json

@@ -0,0 +1,55 @@
+{
+  "name": "antarctica",
+  "nations": [
+    {
+      "coordinates": [1159, 1261],
+      "name": "New Zealand Claim",
+      "flag": "nz"
+    },
+    {
+      "coordinates": [1409, 1571],
+      "name": "French Claim",
+      "flag": "tf"
+    },
+    {
+      "coordinates": [1681, 1093],
+      "name": "Australian Claim",
+      "flag": "hm"
+    },
+    {
+      "coordinates": [1260, 510],
+      "name": "Norway Claim",
+      "flag": "bv"
+    },
+    {
+      "coordinates": [900, 686],
+      "name": "United Kingdom Claim",
+      "flag": "gb"
+    },
+    {
+      "coordinates": [351, 703],
+      "name": "Argentina Claim",
+      "flag": "ar"
+    },
+    {
+      "coordinates": [506, 939],
+      "name": "Chile Claim",
+      "flag": "cl"
+    },
+    {
+      "coordinates": [705, 1264],
+      "name": "Marie Byrd Land",
+      "flag": "aq"
+    },
+    {
+      "coordinates": [1532, 716],
+      "name": "Penguins",
+      "flag": "aq"
+    },
+    {
+      "coordinates": [1100, 954],
+      "name": "Ancient Aliens",
+      "flag": "Cthulhu Republic"
+    }
+  ]
+}

map-generator/main.go

@@ -92,6 +92,7 @@ var maps = []struct {
     {Name: "conakry"},
     {Name: "caucasus"},
     {Name: "beringsea"},
+    {Name: "antarctica"},
 	{Name: "big_plains", IsTest: true},
 	{Name: "half_land_half_ocean", IsTest: true},
 	{Name: "ocean_and_land", IsTest: true},

resources/lang/en.json

@@ -365,7 +365,8 @@
     "luna": "Luna",
     "conakry": "Conakry",
     "caucasus": "Caucasus",
-    "beringsea": "Bering Sea"
+    "beringsea": "Bering Sea",
+    "antarctica": "Antarctica"
   },
   "map_categories": {
     "featured": "Featured",

resources/maps/antarctica/manifest.json

@@ -0,0 +1,70 @@
+{
+  "map": {
+    "height": 2000,
+    "num_land_tiles": 1292228,
+    "width": 2000
+  },
+  "map16x": {
+    "height": 500,
+    "num_land_tiles": 79013,
+    "width": 500
+  },
+  "map4x": {
+    "height": 1000,
+    "num_land_tiles": 320576,
+    "width": 1000
+  },
+  "name": "antarctica",
+  "nations": [
+    {
+      "coordinates": [1159, 1261],
+      "flag": "nz",
+      "name": "New Zealand Claim"
+    },
+    {
+      "coordinates": [1409, 1571],
+      "flag": "tf",
+      "name": "French Claim"
+    },
+    {
+      "coordinates": [1681, 1093],
+      "flag": "hm",
+      "name": "Australian Claim"
+    },
+    {
+      "coordinates": [1260, 510],
+      "flag": "bv",
+      "name": "Norway Claim"
+    },
+    {
+      "coordinates": [900, 686],
+      "flag": "gb",
+      "name": "United Kingdom Claim"
+    },
+    {
+      "coordinates": [351, 703],
+      "flag": "ar",
+      "name": "Argentina Claim"
+    },
+    {
+      "coordinates": [506, 939],
+      "flag": "cl",
+      "name": "Chile Claim"
+    },
+    {
+      "coordinates": [705, 1264],
+      "flag": "aq",
+      "name": "Marie Byrd Land"
+    },
+    {
+      "coordinates": [1532, 716],
+      "flag": "aq",
+      "name": "Penguins"
+    },
+    {
+      "coordinates": [1100, 954],
+      "flag": "Cthulhu Republic",
+      "name": "Ancient Aliens"
+    }
+  ]
+}

src/core/game/Game.ts

@@ -152,6 +152,7 @@ export enum GameMapType {
   Conakry = "Conakry",
   Caucasus = "Caucasus",
   BeringSea = "Bering Sea",
+  Antarctica = "Antarctica",
 }
 
 export type GameMapName = keyof typeof GameMapType;
@@ -167,6 +168,7 @@ export const mapCategories: Record<string, GameMapType[]> = {
     GameMapType.Asia,
     GameMapType.Africa,
     GameMapType.Oceania,
+    GameMapType.Antarctica,
   ],
   regional: [
     GameMapType.BritanniaClassic,

src/server/MapPlaylist.ts

@@ -91,6 +91,7 @@ const frequency: Partial<Record<GameMapName, number>> = {
   Conakry: 3,
   Caucasus: 5,
   BeringSea: 5,
+  Antarctica: 1,
 };
 
 const TEAM_WEIGHTS: { config: TeamCountConfig; weight: number }[] = [