NOTICE — Data Attribution for proj.db

`proj.db` bundled in this crate (`data/proj.db`) is the **complete, unmodified**
multi-authority CRS / coordinate-operation database as built and shipped by the
upstream PROJ project (https://proj.org) — it is a byte-for-byte copy of PROJ's
own `proj.db` build artifact, not a reduced or EPSG-only subset. Its `metadata`
table (a plain SQLite table, inspectable offline with `sqlite3 data/proj.db
'SELECT * FROM metadata'`; the crate itself does not currently expose a
dedicated Rust accessor for it) reports:

| Key                          | Value      |
|-------------------------------|------------|
| DATABASE.LAYOUT.VERSION.MAJOR | 1          |
| DATABASE.LAYOUT.VERSION.MINOR | 6          |
| PROJ.VERSION                  | 9.7.0      |
| PROJ_DATA.VERSION             | 1.23       |
| EPSG.VERSION                  | v12.022    |
| EPSG.DATE                     | 2025-08-30 |
| ESRI.VERSION                  | ArcGIS Pro 3.5 |
| ESRI.DATE                     | 2025-05-11 |
| IGNF.VERSION                  | 3.1.0      |
| IGNF.DATE                     | 2019-05-24 |
| NKG.VERSION                   | 1.0.w      |
| NKG.DATE                      | 2025-02-13 |

This file is built from PROJ **9.7.0**'s data pipeline (`DATABASE.LAYOUT.VERSION`
1.6). It has not yet been regenerated against the PROJ 9.8.0 `data/sql` tree that
ships alongside it under `sql/` in this directory (that directory is a schema /
provenance snapshot only — see `README.md`); the registry content itself
therefore currently lags the PROJ-9.8.0 algorithm parity claimed elsewhere in
this project by one PROJ data release.

## Registries included

The database aggregates several independently-maintained geodetic registries,
all as assembled by, and redistributed unmodified from, the upstream PROJ
project's own `proj.db` build:

- **EPSG** — the EPSG Geodetic Parameter Dataset (https://epsg.org), maintained
  by the Geomatics Committee of the International Association of Oil & Gas
  Producers (IOGP). Version `v12.022`, dated 2025-08-30. Use of the EPSG
  Dataset is subject to the EPSG terms of use; see
  https://epsg.org/terms-of-use.html. The EPSG Dataset is not provided "as
  part of" any product but is reproduced here, via PROJ, for the purpose of
  coordinate transformation. The EPSG data is by far the largest and most
  heavily cross-referenced registry in the file (EPSG-authority rows appear in
  every core CRS / operation / lookup table).
- **Esri** — coordinate reference system definitions from Esri's ArcGIS Pro
  product (version "ArcGIS Pro 3.5", dated 2025-05-11), included by PROJ under
  the `ESRI` authority (PROJ's `scripts/build_db_from_esri.py`). Redistribution
  here is solely as an unmodified pass-through of PROJ's own build; consult
  PROJ's upstream documentation and Esri's own terms for the underlying data's
  provenance and use conditions.
- **IGNF** — the French national mapping agency (IGN — Institut national de
  l'information géographique et forestière) geodetic registry, version
  `3.1.0`, dated 2019-05-24, included by PROJ under the `IGNF` authority
  (PROJ's `scripts/build_db_create_ignf_from_xml.py`, sourced from
  `https://raw.githubusercontent.com/rouault/proj-resources/master/IGNF.v3.1.0.xml`).
- **IAU_2015** — International Astronomical Union (IAU) 2015 celestial-body
  reference systems (Mars, the Moon, and other bodies), included by PROJ under
  the `IAU_2015` authority (PROJ's `scripts/build_db_from_iau.py`).
- **NKG** — the Nordic Geodetic Commission (NKG) transformation registry,
  version `1.0.w`, dated 2025-02-13, hand-maintained by PROJ from
  `https://github.com/NordicGeodesy/NordicTransformations`.
- **OGC** — a small number of Open Geospatial Consortium well-known
  identifiers (e.g. `CRS84`), part of PROJ's own built-in customizations.

The database file was generated from the data SQL of the PROJ project
(https://proj.org), which is distributed under an X/MIT-style license
(Copyright the PROJ contributors; see `../../../LICENSE-THIRD-PARTY` at the
repository root for the full PROJ license text). PROJ in turn assembles the
EPSG, Esri, IGNF, IAU_2015, and NKG datasets listed above; this crate
redistributes that assembled result unmodified, in full, including all
authorities — it is **not** limited to EPSG.

## Reading the data

This file is read by the pure-Rust `oxisql-sqlite-compat` reader (behind the
`oxiproj-db` crate's `epsg` / `db` features); it does not, by its inclusion,
add any C/C++ runtime dependency to OxiProj.
