City coordinates — GeoNames attribution

Data source and author: GeoNames, https://www.geonames.org/
License: Creative Commons Attribution 4.0 International (CC BY 4.0)
https://creativecommons.org/licenses/by/4.0/

The coordinate table city-coordinates.mjs is derived from the GeoNames gazetteer.
Changes: records were selected for the 318 cities in the Couriero catalog;
coordinates (WGS84 latitude and longitude) were not changed. Each tuple retains
the GeoNames ID so its source record can be inspected at:
https://www.geonames.org/<GeoNames-ID>/

Coverage: all 318 catalog cities. A city was matched by country code and exact
primary/alternate name; ambiguous historic names were resolved by primary name.
Source priority: cities15000, then cities1000 for smaller omitted towns, then
the Kyrgyzstan country dump for Tamchy. No population, names or raw gazetteer
files are downloaded by the browser during location detection.

Sources retrieved on 31 October 2026:
https://download.geonames.org/export/dump/cities15000.zip
https://download.geonames.org/export/dump/cities1000.zip
https://download.geonames.org/export/dump/KG.zip
Data format and source license:
https://download.geonames.org/export/dump/readme.txt

SHA-256 of the uncompressed UTF-8 source files:
cities15000.txt: 2da249a68bfd073a98417f3ff38a8312da50868b94a036da61866df24084aee1
cities1000.txt: a7cda8e2a2e19f354326d368dbb37b95cd653f4457e67e49e94919e881a41034
KG.txt: d285c314744d7229ec3856176b2dd6263665b4d7a3b50293fbadb8e666b8882d

GeoNames data is provided as-is, without a guarantee of completeness or accuracy.
Location detection is optional. The app processes a single browser-provided
position locally; it does not transmit or store that position. It suggests only
a nearby catalog city and asks for manual selection outside its coverage or
when location accuracy is insufficient.