Viana do Castelo

Sources

• parlamento.pt · checked Oct 12, 2026 Assembleia da República, Constituição da República Portuguesa (arts. 6 and 225: Regiões Autónomas dos Açores e da Madeira) and ISO 3166-2:PT subdivision names, read 2026-10-12: name changed from geoBoundaries upper-case Portuguese to the English/standard form (Lisboa -> Lisbon, regions -> Azores / Madeira), per world conventions section 5. For: Viana do Castelo (name, type and address code)
• github.com · checked Oct 12, 2026 geoBoundaries (Runfola et al.) gbOpen PRT ADM1 (simplified GeoJSON; boundary year 2016, build Dec 12, 2023; underlying source: DG Territory, licence: Open Data Commons Open Database License 1.0; gbOpen CC BY 4.0), read 2026-10-12: name and outline of this first-level division. Code: ISO 3166-2 PT-16 from Debian iso-codes (salsa.debian.org/iso-codes-team/iso-codes, data/iso_3166-2.json), matched by name, cross-checked with Natural Earth 10m admin-1 (public domain). For: Viana do Castelo (name, type and address code)
• github.com · checked Oct 12, 2026 geoBoundaries (Runfola et al.) gbOpen PRT ADM1 simplified GeoJSON (boundary year 2016, build Dec 12, 2023; source DG Territory; gbOpen CC BY 4.0), read 2026-10-12: outline, made valid with ST_MakeValid; flags de_jure=t de_facto=t. For: Viana do Castelo boundary