gistfile1.txt

var Terraformer = require('../Terraformer/'),
    GeoStore    = require('../terraformer-geostore/node/terraformer-geostore.js').GeoStore,
    RTree       = require('../terraformer-geostore-rtree/').RTree,
    LevelStore  = require('../terraformer-geostore-leveldb/').LevelStore;
    fs          = require('fs');

var JSONStream = require('JSONStream');

var index = new RTree();
var store = new GeoStore({
  store: new LevelStore({name: "./buildings"}),
  index: index
});

var incoming = fs.createReadStream("./buildings.json", { encoding: "utf8" });

var stream = JSONStream.parse(['features', true]);

stream.on("data", function (data) {
  if (data.properties.YEAR_BUILT && data.properties.YEAR_BUILT > 1600) {
    var year = data.properties.YEAR_BUILT;
    var oid = data.properties.OBJECTID;
    data.properties = { YEAR_BUILT: year, OBJECTID: oid };
    data.id = oid;
    store.add(data, function () { });
  }
});

incoming.pipe(stream);

stream.on("end", function (data) {
  index.serialize(function (err, data) {
    fs.writeFileSync("./rtree.json", JSON.stringify(data), 'utf8');
  });
});