Read dated facts

Use the native API

import { facts,FACTS_READ,distanceKm } from "@johnmorrisdotca/kuni/facts";
const japan=facts("JP");
console.log(FACTS_READ,japan?.population,japan?.populationYear,japan?.areaOf);
console.log(Math.round(distanceKm({lat:35.68,lon:139.76},{lat:51.5,lon:-0.12})));

2026-10-09 123802000 2024 whole
9563

FACTS_READ identifies the stored Wikidata snapshot. Population and area retain their own years, and areaOf distinguishes whole area from land-only figures. Coordinates are source representative points, not calculated centroids. Null means a source did not supply a usable value; zero is a value and must not be treated as missing. Borders are stored country codes; an island can have an empty list.

Preserve subdivision uncertainty

Subdivision facts can be null where Wikidata has none or conflicting values. Capital text and capital coordinates are separate; disabling the card’s capital marker does not discard capital text fields. The complete original facts, subdivision-facts and licence notice explain source scope. The distance helper takes latitude/longitude objects and returns kilometres, not a route or travel time.