geohash_bounds 0.1.0

Pure-Dart geohash query bounds for Firestore spatial queries, with viewport-to-cell clustering and antimeridian handling.

0.1.0

Initial release.

• GeohashUtil.encode — encode lat/lng into a geohash string.
• GeohashUtil.queryBounds — geohash range bounds fully covering a circle, for Firestore-style string range queries (port of geofire-common).
• GeohashUtil.cellsForViewport — enumerate coarse geohash cells covering a map viewport, for low-zoom cluster aggregation (e.g. one count() per cell).
• GeohashUtil.viewportToCircle — convert viewport corners to center + radius, antimeridian-safe.
• GeohashUtil.distanceBetween — Haversine distance in meters.
• GeohashUtil.wrapLongitude — normalize longitudes into [-180, 180].