# Third-party licenses and attribution

GTA6 Leonida Atlas separates project source code from third-party data and references.

## Project code

Original GTA6 Leonida Atlas source code in this repository is licensed under the GNU Affero General Public License v3.0 only (`AGPL-3.0-only`). See [LICENSE](./LICENSE).

## GTADB / Map GTA data

Some data and cartographic source material used by GTA6 Leonida Atlas originates from `gtadb.org` / Map GTA community reconstruction material.

- Source: https://github.com/rolux/gtadb.org
- Map: https://map.gtadb.org
- Pinned source revision used by this release: `7c3f8c295d64254e6b6d269b77c6f84fc4339f9c`
- Data license: Creative Commons Attribution 4.0 International (`CC BY 4.0`)
- License URL: https://creativecommons.org/licenses/by/4.0/
- Attribution: `gtadb.org` and contributors

Adaptations made in this repository may include coordinate transforms, filtering, rendering windows, generalized/recolored basemap presentation, and derived metadata used to label entries as positioned, unpositioned, supported or uncertain.

Data originating from `gtadb.org` remains under CC BY 4.0 and must retain attribution.

## GTADB code

If code is copied directly from `gtadb.org`, it remains subject to that project's MIT license and copyright notices. This release is structured to keep direct third-party code notices here when applicable.

## Rockstar Games references

Rockstar Games / Take-Two Interactive own Grand Theft Auto, Grand Theft Auto VI, GTA VI names, logos, imagery, video and related intellectual property.

Rockstar media is used only as cited visual/reference evidence and outbound source attribution. It is not licensed as part of this repository.

GTA6 Leonida Atlas is an independent fan/community project and is not affiliated with, endorsed by or sponsored by Rockstar Games or Take-Two Interactive.

## Photographic surface maps — v0.8.0

The following Poly Haven assets are licensed under **CC0-1.0** ([asset license](https://polyhaven.com/license)). Clean Asphalt uses its documented 2.1 m physical coverage in the road shader. Their 1K diffuse, OpenGL normal and roughness maps are served locally as WebP. The diffuse/roughness maps use quality 88; normals use lossless encoding. No cropping or resampling was applied.

- [Clean Asphalt](https://polyhaven.com/a/clean_asphalt)
- [Concrete Wall 007](https://polyhaven.com/a/concrete_wall_007)
- [Rock Boulder Dry](https://polyhaven.com/a/rock_boulder_dry)
- [Wood Planks Grey](https://polyhaven.com/a/wood_planks_grey)
- [Sandy Gravel 02](https://polyhaven.com/a/sandy_gravel_02)

Acquired on 6 September 2026 through the public asset API. Exact download URLs, source and converted SHA-256 checksums, dimensions and byte sizes are recorded in `public/assets/street-leonida/surfaces/manifest.json`. These generic surface materials are original Poly Haven assets, not textures extracted from GTA.