geobuf-merge/dist/index.mjs

Merge multiple geobuf-encoded geometries together

// src/index.ts
import Pbf2 from "pbf";
import { encode } from "geobuf";

// src/helpers/normalize.ts
import { decode } from "geobuf";
import Pbf from "pbf";
function normalizePbf(pbf) {
  const decoded = decode(new Pbf(pbf));
  if (decoded.type === "FeatureCollection") {
    return decoded;
  }
  if (decoded.type === "GeometryCollection") {
    return {
      type: "FeatureCollection",
      features: decoded.geometries.map((geometry) => ({
        type: "Feature",
        geometry,
        properties: {}
      }))
    };
  }
  return {
    type: "FeatureCollection",
    features: [
      decoded.type === "Feature" ? decoded : {
        type: "Feature",
        geometry: decoded,
        properties: {}
      }
    ]
  };
}

// src/helpers/merge.ts
function mergeFeatureCollections(featureCollections) {
  return {
    type: "FeatureCollection",
    features: featureCollections.flatMap((d) => d.features)
  };
}

// src/index.ts
function mergeGeobufs(geobufs) {
  const decoded = geobufs.map((geobuf) => normalizePbf(geobuf));
  return encode(mergeFeatureCollections(decoded), new Pbf2());
}
export {
  mergeGeobufs
};