superset-frontend/plugins/legacy-plugin-chart-map-box/src/utils/roundDecimal.js

export default function roundDecimal(number, precision) {
  let roundedNumber;
  let p = precision;
  if (precision) {
    roundedNumber = Math.round(number * (p = 10 ** p)) / p;
  } else {
    roundedNumber = Math.round(number);
  }

  return roundedNumber;
}