NOTICE

Cave Survey Viewer
Copyright (c) 2026 Matt Notarangelo
Licensed under the GNU Affero General Public License v3.0 or later
(SPDX-License-Identifier: AGPL-3.0-or-later — see LICENSE).

This product's source code and its built/distributed output (the `dist/`
static site) are licensed under the AGPL-3.0-or-later. Anyone who distributes
this software, or hosts a modified version of it as a network service, must
make the complete corresponding source available under the same licence.

---

## Third-party test vectors (NOT part of the distributed product)

The repository vendors a small number of reference test vectors used ONLY by
the test suite to validate parser interoperability against genuine
reference-tool output. They are not imported by the application and are not
included in the build output.

- test/fixtures/survex/ (Survex .3d files + dump3d output)
  From the Survex project (https://survex.com/), GNU GPL v2 or later.
- test/fixtures/compass/ (Compass .plt files + Survex's decode of them)
  Decodes produced with Survex tooling, GNU GPL v2 or later.
- test/fixtures/therion/ (a real .lox/.3d survey pair used as a
  cross-format oracle)
  From https://github.com/tr1813/ultima-patagonia-topo; the upstream
  repository does not state an explicit licence. Vendored solely as small
  interop test vectors (survey data, not software).

See the PROVENANCE.md file in each directory for exact sources and rationale.
The Survex-derived files are GPL-v2-or-later, which is licence-compatible
with this project's AGPL-3.0-or-later (via the "or any later version"
upgrade path); in any case they are aggregated with, not combined into, the
application code, and the application is not a derivative work of them.

---

## Bundled example survey (public/system_migovec.lox)

The "Load example cave" dataset is the Tolminski Migovec cave system,
surveyed by the JSPDT and the Imperial College Caving Club (ICCC). The
compiled Therion .lox model is published for public download by the project:

https://github.com/iccaving/migovec-survey-data
Viewer: https://iccaving.github.io/migovec-survey-data/

Included here as an example dataset, with attribution to its surveyors. This
is real, publicly accessible survey data (measurements), not software.

---

## Runtime dependencies

- three (3D rendering) — MIT License

MIT-licensed dependencies may be incorporated into AGPL-licensed works.
Build/test tooling (Vite, TypeScript, Vitest) is MIT-licensed.