tilebelt

simple tile utilities

install

npm install @mapbox/tilebelt

usage

import * as tilebelt from '@mapbox/tilebelt';

const tile = [10, 15, 8] // x,y,z

tilebelt.tileToGeoJSON(tile);
// {
//   "type": "Polygon",
//   "coordinates": [
//     [
//       [ -165.9375, 82.8533822917608 ],
//       [ -165.9375, 82.67628497834903 ],
//       [ -164.53125, 82.67628497834903 ],
//       [ -164.53125, 82.8533822917608 ],
//       [ -165.9375, 82.8533822917608 ]
//     ]
//   ]
// }

tilebelt.getParent(tile);
// [ 5, 7, 7 ]

features

function	description
`tileToGeoJSON(tile)`	get a geojson representation of a tile
`tileToBBOX(tile)`	get the bbox of a tile
`bboxToTile(bbox)`	get the smallest tile to cover a bbox
`getChildren(tile)`	get the 4 tiles one zoom level higher
`getParent(tile)`	get the tile one zoom level lower
`getSiblings(tile)`	get the 4 sibling tiles for a tile
`hasSiblings(tiles, tile)`	check to see if an array of tiles contains a tiles siblings
`hasTile(tiles, tile)`	check to see if an array of tiles contains a particular tile
`tilesEqual(tile1, tile2)`	check to see if two tiles are the same
`tileToQuadkey(tile)`	get the quadkey for a tile
`quadkeyToTile(quadkey)`	get the tile for a quadkey
`pointToTile(lon, lat, zoom)`	get the tile for a point at a specified zoom level
`pointToTileFraction(lon, lat, zoom)`	get the precise fractional tile location for a point at a zoom level

developing

npm ci          # install deps
npm test        # tests
npm run bench   # run benchmarks
npm run format  # format using prettier