Sudan learning maps, prepared 18 October 2026

States: Information Management Working Group (IMWG), OCHA ROSEA,
2020 reference boundaries distributed through geoBoundaries gbOpen.
Licence: Creative Commons Attribution 3.0 IGO.
https://creativecommons.org/licenses/by/3.0/igo/
https://data.humdata.org/dataset/sudan-administrative-boundaries-levels-0-2
https://www.geoboundaries.org/api/current/gbOpen/SDN/ADM1/
Pinned source revision: 9469f09, geoBoundaries-SDN-ADM1_simplified.geojson
https://github.com/wmgeolab/geoBoundaries/tree/9469f09/releaseData/gbOpen/SDN/ADM1
Original simplified snapshot: scripts/sudan-admin-source.geojson
Metadata: /data/sudan-states-source-metadata.json

Eighteen states are retained with source ISO identifiers. Shared edges are
unchanged. The source has a nineteenth feature called Abyei PCA. This disputed
area is excluded from the answer pool and is not assigned to a state.
The source includes Hala'ib in Red Sea State and does not include Bir Tawil.
Hala'ib is disputed between Sudan and Egypt. Abyei is disputed between Sudan
and South Sudan. The learning maps do not settle these disputes, draw current
front lines, or show safe movement. South Sudan is a separate country.
https://unisfa.unmissions.org/en/factsheet

Nile, Blue Nile, White Nile and Atbara: Natural Earth 1:10m river centrelines,
public domain. Blue Nile source names: El Bahr el Azraq; White Nile:
El Bahr el Abyad. Reaches are intersected with the eighteen-state union plus
a 0.025-degree border margin. Some generalisation gaps can remain. Main Nile
source segments around Lake Nubia are retained. This is a selected river
exercise, not a complete drainage network.
Lake Nubia: Natural Earth's Lake Nasser reservoir polygon, intersected with
the same land margin and clipped at 22 degrees north to represent its Sudanese
reach. Water level and shoreline change; this is reference geometry.
https://github.com/nvkelso/natural-earth-vector/blob/master/geojson/ne_10m_rivers_lake_centerlines.geojson
https://github.com/nvkelso/natural-earth-vector/blob/master/geojson/ne_10m_lakes.geojson
https://www.naturalearthdata.com/about/terms-of-use/

The Red Sea answer target is an offshore rectangle, not a marine boundary.
The existing map shell supplies Natural Earth coastal context.
City pins are curated representative centres, not municipal boundaries.
Curated prompts and coordinates: /data/sudan-map-places.json
Selected geometry snapshot: scripts/sudan-map-source.geojson
Rebuild all playable geometry, deck data and names:
node scripts/build-sudan-maps.mjs

Sights pins use Wikipedia coordinate lookups for archaeological sites, towns,
and Deriba. Dinder uses the Ramsar site reference coordinates (34°46'59"E,
12°19'N); Wikipedia’s pin falls outside the reference Sudan boundary.
Taka Mountains has a curated representative pin beside
Kassala; Meroe marks the archaeological area rather than a single pyramid.
The two marine pins use UNESCO's component coordinates:
https://whc.unesco.org/en/list/262/maps/
Sanganeb has no dedicated English Wikipedia article; its related article link
is the List of World Heritage Sites in Sudan. UNESCO supplies the site source.
There are three World Heritage inscriptions, not one per pin:
https://whc.unesco.org/en/statesparties/sd/
Tentative List status is distinguished from World Heritage inscription.