Reading vector tiles from PostGIS

vt.js

const zlib = require("zlib");
const Protobuf = require("pbf");
const postgis = require("tilelive-postgis");
const tilelive = require("@mapbox/tilelive");
const VectorTile = require("@mapbox/vector-tile").VectorTile;

postgis.registerProtocols(tilelive);

const uri =
  "postgis://postgres@localhost/test?table=test&layerName=myLayer&geometry_field=geom";

tilelive.load(uri, (error, source) => {
  console.error("error", error);
  console.log("source", source);
  source.getTile(0, 0, 0, (err, buffer, headers) => {
    console.error("err", err);
    console.log("buffer", buffer);
    console.log("headers", headers);
    source.close();

    zlib.unzip(buffer, (err, buffer) => {
      const tile = new VectorTile(new Protobuf(buffer));
      const layers = tile.layers;

      Object.keys(layers).forEach(layerId => {
        const layer = layers[layerId];
        console.log(layerId, layer.length);

        for (let index = 0; index < layer.length; index++) {
          const feature = layer.feature(index);
          console.log(feature.id, feature);
        }
      });
    });
  });
});