Module area

import { calculateArea, geojsonArea } from '@nextgis/area';

const area = geojsonArea(geojson);
const area2 = calculateArea([
  [51.82, 63.8],
  [43.48, 55.62],
  [75.38, 59.13],
  [51.82, 63.8], // the first and last positions MUST contain identical values
]);