@deck.gl/geo-layers/dist/esm/quadkey-layer/quadkey-utils.js

deck.gl layers supporting geospatial use cases and GIS formats

import { worldToLngLat } from '@math.gl/web-mercator';
const TILE_SIZE = 512;
export function quadkeyToWorldBounds(quadkey) {
  let x = 0;
  let y = 0;
  let mask = 1 << quadkey.length;
  const scale = mask / TILE_SIZE;

  for (let i = 0; i < quadkey.length; i++) {
    mask >>= 1;
    const q = parseInt(quadkey[i]);
    if (q % 2) x |= mask;
    if (q > 1) y |= mask;
  }

  return [[x / scale, TILE_SIZE - y / scale], [(x + 0.99) / scale, TILE_SIZE - (y + 0.99) / scale]];
}
export function getQuadkeyPolygon(quadkey) {
  const [topLeft, bottomRight] = quadkeyToWorldBounds(quadkey);
  const [w, n] = worldToLngLat(topLeft);
  const [e, s] = worldToLngLat(bottomRight);
  return [e, n, e, s, w, s, w, n, e, n];
}
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