Adds Antarctica map

[RickD004]

Description:

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 2). )

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

antarctica.mp4

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

Please complete the following:

• I have added screenshots for all UI updates
• I process any text displayed to the user through translateText() and I've added it to the en.json file
• I have added relevant tests to the test directory
• 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

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 0c3ce559-a1bf-412d-80bc-5463889ec3b2

📥 Commits

Reviewing files that changed from the base of the PR and between 582b4ee and 5dbd460.

📒 Files selected for processing (1)

• CREDITS.md

✅ Files skipped from review due to trivial changes (1)

• CREDITS.md

---

Walkthrough

Adds Antarctica as a new game map: assets and manifest, map-generator registration, English label, game enum/category update, playlist weighting, and new credit entries for Polar Geospatial Center and USGS dataset.

Changes

Cohort / File(s)	Summary
Core Game Type Definition src/core/game/Game.ts	Added Antarctica to GameMapType and included it in the continental category.
Map Generation Pipeline map-generator/main.go, map-generator/assets/maps/antarctica/info.json	Registered antarctica in maps registry and added info.json with 10 nation entries (coordinates, names, flags).
Map Configuration resources/maps/antarctica/manifest.json	New manifest with name: "antarctica", base/variant dimensions and land-tile counts, plus 10 nation definitions.
Localization & Playlist resources/lang/en.json, src/server/MapPlaylist.ts	Added map.antarctica translation and set playlist frequency weight Antarctica: 2.
Attribution CREDITS.md	Inserted “Antarctica Map” credit block with Polar Geospatial Center citation (DOI/Dataverse/version), PGC Terms of Use link, USGS dataset attribution, and public-domain reference link.

Sequence Diagram(s)

sequenceDiagram
  participant Dev as Developer/CI
  participant Gen as Map Generator
  participant Assets as Assets (resources/..., map-generator/assets)
  participant Server as Game Server
  participant Client as Game Client

  Dev->>Gen: run build/generate (includes `antarctica`)
  Gen->>Assets: read `assets/maps/antarctica/info.json` and image
  Gen->>Assets: read `resources/maps/antarctica/manifest.json`
  Gen-->>Server: emit generated map assets/manifest
  Server->>Server: register map (`GameMapType.Antarctica`)
  Server->>Server: include in playlist (weight 2)
  Client->>Server: request map list
  Server-->>Client: return map list with Antarctica entry

Loading

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Poem

❄️ New ice on the map, a frosty chart,
Penguins, claims, and a daring heart,
Antarctica now joins the play,
Cold winds code the world today. 🧊

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The pull request title 'Adds Antarctica map' directly and clearly describes the main change: introducing a new Antarctica map to the system.
Description check	✅ Passed	The description is well-related to the changeset, providing context about the map's purpose, features (no green terrain, rotation number of 2), and completion of the Continental category.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against the current code and only fix it if needed.

Inline comments:
In `@CREDITS.md`:
- Line 72: Replace the agency name text in CREDITS.md where it currently reads
"U.S Geological Survey" (the line containing the link
https://earthexplorer.usgs.gov/metadata/4980/GT30ANTARCPS/) with the correctly
punctuated "U.S. Geological Survey" to ensure consistent naming across the
credits; update only the visible text portion before or inside the markdown link
so the URL remains unchanged.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

---

ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 2e0d64cb-77c1-4a09-8262-44bc73aae597

📥 Commits

Reviewing files that changed from the base of the PR and between b88c3a3 and 582b4ee.

⛔ Files ignored due to path filters (4)

• map-generator/assets/maps/antarctica/image.png is excluded by !**/*.png
• resources/maps/antarctica/map.bin is excluded by !**/*.bin
• resources/maps/antarctica/map16x.bin is excluded by !**/*.bin
• resources/maps/antarctica/map4x.bin is excluded by !**/*.bin

📒 Files selected for processing (8)

• CREDITS.md
• map-generator/assets/maps/antarctica/info.json
• map-generator/main.go
• resources/lang/en.json
• resources/maps/antarctica/manifest.json
• resources/maps/antarctica/thumbnail.webp
• src/core/game/Game.ts
• src/server/MapPlaylist.ts