Leonida Atlas Puts 2,204 Sourced GTA 6 Places on One Open-Source Map

Leonida Atlas is a browser-based map of Leonida, the state GTA VI is set in. You start at the state-wide view, drill into Vice City street by street, filter by landmarks, nature, transport, businesses or evidence, and open any place to see its context, its source and its approximate in-game coordinates.

The project is an independent fan effort. It isn't affiliated with or endorsed by Rockstar Games or Take-Two Interactive, and the repository says so in its first paragraph.

What separates it from the rest of the fan-map scene is the licence. The full source is public under AGPL-3.0-only, and a fork gets the complete map, editor, personal library, backup flow and 3D explorer without needing access to the official instance or any private service.

• Repository: github.com/navanem/gta6-leonida-atlas, published 5 September 2026
• Current release: v0.8.0
• Licence: AGPL-3.0-only for the code

The catalogue isn't scraped guesswork. It's derived from GTADB and Map GTA contributors under CC BY 4.0, and the atlas keeps their stable source IDs and evidence intact.

The arithmetic is worth reading closely. There are 2,198 GTADB records, of which 2,091 carry a position and 107 do not, plus six regional entries. That makes 2,204 searchable entries in total.

Those 107 unpositioned records are the interesting part. Rather than dropping them or inferring coordinates from real-world Florida analogues, the project keeps them visible and unplaced. The contribution guide makes that a rule: unknown positions stay null, and pull requests that infer game coordinates from real-world locations get rejected. Approximate placements are labelled as approximate.

• 2,198 GTADB records: 2,091 positioned, 107 deliberately unpositioned
• Plus six regional entries, for 2,204 searchable places
• Data attribution: GTADB / Map GTA contributors, CC BY 4.0

The atlas is a static Vite application written in React with strict TypeScript. Leaflet renders the fictional coordinate system, Zustand keeps domain state separate from UI state, Dexie provides transactional IndexedDB repositories, and Three.js powers the optional 3D explorer.

There's no server component. The public build runs without environment variables, a database, a CMS or an external map provider, which is why a fork works straight out of the box. Running it locally needs Node.js 22.12 or newer and pnpm 10 or newer.

git clone https://github.com/navanem/gta6-leonida-atlas.git
cd gta6-leonida-atlas
pnpm install --frozen-lockfile
pnpm dev

The dev server listens on port 4330. Deployment is equally plain: push the dist folder to any static host, or build the included Nginx container. A subdirectory build is one environment variable, ATLAS_BASE_PATH.

• Stack: Vite, React, strict TypeScript, Leaflet, Zustand, Dexie, Three.js
• Requirements to build: Node.js 22.12+ and pnpm 10+
• Ships a Dockerfile with an independent Nginx container

Everything personal stays on your machine. Favorites, notes, collections, custom markers and settings live in the browser's IndexedDB database, and a write is only reported as saved once the transaction commits.

Backups are portable JSON files, capped at 10 MiB and validated before import. Imports merge atomically, so malformed data can't leave you with half a workspace. Open tabs stay in sync through BroadcastChannel, and revision checks stop a stale tab from overwriting newer notes.

The trade-off is real and the project states it. Browser storage can be cleared or evicted by the browser itself, so exporting a backup periodically is on you. The service worker caches the app shell, catalogue and map after the first complete online load, which means the installed experience reopens offline.

GTA6State is an independent publication and database covering Grand Theft Auto VI: news, guides, and a structured knowledge graph of Leonida spanning vehicles, characters and locations. It isn't affiliated with, endorsed by or sponsored by Rockstar Games or Take-Two Interactive.

Its editorial method is the reason the atlas fits. Verification panels label each piece of information as official, verified in game, reported, rumor or not yet confirmed, with source and review context where available. That's the same instinct behind leaving 107 places unpositioned.

Alongside the atlas, the site runs a launch hub tracking the 19 November date, plus vehicle, character and location databases and a launch checklist tool.

GTA VI arrives on 19 November 2026 on PlayStation 5 and Xbox Series X|S, per Rockstar's newswire announcement. Until then, every fan map is a reconstruction from trailers, screenshots and the Extended Look.

The real test comes at launch, when the actual geography of Leonida becomes checkable. A catalogue built on labelled evidence and null coordinates should survive that better than one built on confident guesses, because corrections land as data changes rather than as a rebuild.

On the project side, watch the release notes and the issue forms. Corrections need a verifiable source for public-place changes, and the required Quality workflow gates every pull request. The repository is young, so contribution volume is the number to watch.

• GTA VI launch: 19 November 2026, PS5 and Xbox Series X|S
• Public-place corrections require a verifiable source
• A required Quality workflow runs on every pull request