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/**
 * download the ccmap file (updated every time the data updates):
 *
 * curl -OL https://data.geocode.earth/wof/dist/meta/whosonfirst-data-admin.ccmap.gz
 *
 *
 * convert ccmap file to typescript (save stdout to `whosonfirst-data-admin.ccmap.ts`):
 *
 * import fs from 'node:fs'
 * const data = fs.readFileSync('whosonfirst-data-admin.ccmap.gz', 'base64')

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/** Computes the IEEE 754 floating-point remainder of x / y. */
export const remainder = (x: number, y: number): number => {
  if (isNaN(x) || isNaN(y) || !isFinite(x) || y === 0) return NaN

  const quotient = x / y
  let n = Math.round(quotient)

  // When quotient is exactly halfway between two integers, round to the nearest even integer
  if (Math.abs(quotient - n) === 0.5) n = 2 * Math.round(quotient / 2)

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/** Returns a random hex string of length chars. */
const randomHexString = (length: number): string => {
  return Array.from({ length }, () => Math.round(Math.random() * 0xf).toString(16)).join('')
}

/** Returns a random BigInt of n bits in length. */
export const randomBigIntN = (n: number): bigint => {
  return BigInt.asUintN(n, BigInt(`0x${randomHexString(Math.ceil(n / 4))}`))
}

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// decorator
function replacerWithPath (fn) {
  let paths = new Map()
  return function (key, value) {
    let path = paths.get(this) || '$'
    if (key) path += Array.isArray(this) ? `[${key}]` : `.${key}`
    let v = fn(key, value, path)
    if (v === Object(v)) paths.set(v, path)
    return v
  }

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const geojson = {
  'id': -99,
  'type': -6,
  'properties': -5,
  'geometry': -4,
  'coordinates': -3,
  'bbox': -2
}

// GeoJSON Feature/Geometry

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// copy->paste into the browser console and wait
// note: sorted with the highest points last

const csv = (text) =>
  text
    .trim()
    .split('\n')
    .map((r) => {
      const c = r.split(',').map((c) => c.trim())
      return {

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package spatial

import (
	"fmt"
	"strconv"

	"github.com/golang/geo/s2"
	"github.com/peterstace/simplefeatures/geom"
)

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sudo tcpdump -X -v 'udp[8:4] = 0x03050b11'

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{
  "AD": "ca",
  "AE": "ar-AE,fa,en,hi,ur",
  "AF": "fa-AF,ps,uz-AF,tk",
  "AG": "en-AG",
  "AI": "en-AI",
  "AL": "sq,el",
  "AM": "hy",
  "AN": "nl-AN,en,es",
  "AO": "pt-AO",

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class Bitwise {
  static trailingZeros8(b) {
    let lsb = (b & -b)
    if(lsb === 0) { return 8 }
    return 31 - Math.clz32(lsb)
  }
  static trailingZeros64(a) {
    for(let i=7; i>=0; i--) {
      let z = Bitwise.trailingZeros8(a[i])
      if(z < 8) { return ((7-i) * 8) + z }