s2js

s2js is a Javascript port of the s2 spherical geometry library.

Installation

npm install s2js

Usage

The library is available as both ESM & CJS modules:

ESM

import { s2 } from 's2js'

CJS

const { s2 } = require('s2js')

CDN

<script type="module">
  import { s2 } from 'https://esm.sh/s2js'
</script>

GeoJSON support

The supplementary geojson module provides convenience functions for working with GeoJSON data in S2:

import { geojson } from 's2js'

const s2Polyline = geojson.fromGeoJSON({
  type: 'LineString',
  coordinates: [
    [102.0, 0.0],
    [103.0, 1.0],
    [104.0, 0.0],
    [105.0, 1.0]
  ]
})

The RegionCoverer supports all geometry types including multi-geometries:

const coverer = new geojson.RegionCoverer({ maxCells: 30 })

const union = coverer.covering({
  type: 'Polygon',
  coordinates: [
    [
      [100.0, 0.0],
      [101.0, 0.0],
      [101.0, 1.0],
      [100.0, 1.0],
      [100.0, 0.0]
    ]
  ]
})

Contributing

If you'd like to contribute a module please open an Issue to discuss.

Copyright