Function mvtToGeoJson

Decode an MVT tile and convert all features to GeoJSON with WGS84 coordinates.

Transforms tile-space coordinates to geographic WGS84 (longitude, latitude) using the Web Mercator (EPSG:3857) inverse projection.

Parameters

• bytes — Raw MVT protobuf bytes.
• extent — Tile extent (typically 4096).
• x — Tile column (x coordinate in the slippy map scheme).
• y — Tile row (y coordinate in the slippy map scheme).
• z — Zoom level.

Returns

A GeoJSON FeatureCollection string with WGS84 coordinates.

Usage (JS)

const response = await fetch('/tiles/10/868/387.pbf');
const geojson = mvtToGeoJson(new Uint8Array(await response.arrayBuffer()), 4096, 868, 387, 10);
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