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GeohashGrid

Purpose​

GeohashGrid decodes Geohash strings into the center points and boundary polygons required by GlobalGridLayer. It provides a lightweight bridge between Geohash tokens and deck.gl geometry without introducing bigint handling.

Usage​

import {GlobalGridLayer, GeohashGrid} from '@deck.gl/geo-layers';

const layer = new GlobalGridLayer({
  id: 'geohash-grid',
  data: dataset,
  globalGrid: GeohashGrid,
  getCellId: d => d.geohash,
  filled: true
});

Use GeohashGrid.cellToLngLat(token) or GeohashGrid.cellToBoundary(token) whenever you need to precompute values outside the layer. All helpers require a string token; bigint arguments throw an error to prevent ambiguous conversions.

Shared conventions​

  • hasNumericRepresentation is false; only string Geohash tokens are supported.
  • Boundaries are returned in longitude/latitude order and close the polygon by repeating the first vertex.
  • The helper exposes a getGeohashBounds utility for computing bounding boxes when needed.