thi-ng/umbrella

import { cm, ft, inch, km, m, mi, mm } from "./length.js";
import { defUnit, mul, pow } from "../unit.js";

export const m2 = defUnit("m2", "square meter", pow(m, 2));
export const mm2 = defUnit("mm2", "square millimeter", pow(mm, 2));
export const cm2 = defUnit("cm2", "square centimeter", pow(cm, 2));
export const km2 = defUnit("km2", "square kilometer", pow(km, 2));
export const ha = defUnit("ha", "hectar", mul(m2, 1e4));

export const ac = defUnit("ac", "acre", mul(m2, 4046.86));
export const sqin = defUnit("sqin", "square inch", pow(inch, 2));
export const sqft = defUnit("sqft", "square foot", pow(ft, 2));
export const sqmi = defUnit("sqmi", "square mile", pow(mi, 2));