geoalgeria data notices

Package code is licensed under the MIT License in LICENSE, and so is the
compilation of wilayas, dairas, communes, their bilingual names, postal codes and
administrative codes. Three parts of the data are not: two derived from
OpenStreetMap, and the mirrored postal data under data/poste/.

The two parts derived from OpenStreetMap are made available under the Open
Database License (ODbL) 1.0 instead. Attribution:
(c) OpenStreetMap contributors
https://opendatacommons.org/licenses/odbl/1-0/
https://www.openstreetmap.org/copyright

1. Wilaya boundary polygons

   data/geojson/wilaya-boundaries.geojson, 69 features, derived from
   OpenStreetMap `admin_level=4` relations, retrieved 2026-06-21, simplified with
   mapshaper. Provenance, including the one deliberate departure from upstream
   OpenStreetMap, is in data/geojson/wilaya-boundaries.metadata.json.

2. Commune centre coordinates

   251 of the 1,541 commune `latitude` / `longitude` values, each taken from that
   commune's own OpenStreetMap `admin_level=8` relation:

   - 56 corrected on 2026-09-27 from the relation's `admin_centre` node, Overpass
     `timestamp_osm_base` 2026-09-27T11:03:52Z. Every row, with its OSM relation
     id, `admin_centre` node id and `ref:ONS`, is listed in
     research/_commune-centres/corrections-2026-09-27.json in the repository, and
     summarised in data/geojson/communes.metadata.json.
   - 189 corrected on 2026-09-29 from the same node, Overpass
     `timestamp_osm_base` 2026-09-29T12:54:47Z, after every one of the 1,541
     centres was compared with its relation's `admin_centre` and tested against
     the relation's own unsimplified boundary. Every row, with the same ids and
     the four containment verdicts that decided it, is listed in
     research/_commune-centres/corrections-2026-09-29.json.
   - 6 corrected in version 2.1.0 from the relation centroid, matched on the
     relation's `ref` tag: Belarbi (2242), El Hamdania (2616), Ouled Bouachra
     (2627), Deux Bassins (2653), Makhda (2915) and El Euch (3427). See
     CHANGELOG.md, 2.1.0. Si Mahdjoub (2644) and El Achir (3407) are NOT in this
     set: each kept the placeholder point it shared with its neighbour, still
     byte-identical to its pre-2.1.0 value, so no OpenStreetMap value was ever
     written to either and no ODbL claim is made over them.

   A commune centre is one value repeated across representations, so the ODbL
   covers these 251 coordinates wherever they appear: data/algeria.json,
   data/communes_w1_w23.json, data/communes_w24_w48.json,
   data/communes_w49_w69.json, data/csv/communes.csv,
   data/geojson/communes.geojson and data/sql/full.sql.

   The other 1,290 commune coordinates, and the 69 wilaya capital coordinates, are
   not OpenStreetMap-derived and no ODbL claim is made over them.

3. Mirrored postal data

   data/poste/ (postoffices.json, atms.json, their CSV and GeoJSON
   representations and their metadata.json) is a generated mirror of
   @geoalgeria/poste, whose source is Algérie Poste's BaridiMap portal
   (https://baridimap.poste.dz), retrieved 2026-06-08. Terms, exactly as
   @geoalgeria/poste states them:

   Data © Algérie Poste; redistributed for reference

   The underlying data is © Algérie Poste, redistributed for reference and to
   power GeoAlgeria (https://geoalgeria.com). It is not offered under the MIT
   License, and no open licence is claimed over it. The post office and ATM
   postal codes, commune codes and wilaya codes carried alongside it are part of
   the MIT compilation above.

Database rights and share-alike obligations may apply to redistributed derived
databases. This notice does not replace any applicable licence text or source
terms.