nyc-bytes

node-nyc-bytes

A node.js module for working with NYC's BYTES of the BIG APPLE datasets.

nyc-bytes automatically downloads, extracts, and exposes a stream of objects from any of the supported datasets. Most datasets return object representations of the records. MapPluto returns GeoJSON Polygons converted from New York - Long Island State Plane Coordinate System (NAD83) to standard Latitude/Longitude (WGS84) for easy mapping use. Requires Node v12 or above.

Currently Supported Datasets

• PLUTO
• MapPluto (requires ogr2ogr)
• NYC Zoning Tax Lot Database
• PAD (Property Address Directory)

Dependencies

This library uses 7z to unzip datasets. It must be installed and the command 7za must be available in your environment's PATH for it to work.

Usage

npm install nyc-bytes

Each dataset is exposed as a singleton object that must be initialized. This ensures that the underlying files are downloaded, extracted, and ready for use. Initializing the dataset returns a Promise that returns once the dataset has finished initializing.

const Bytes = require('nyc-bytes');

const dataset = Bytes.Pluto;
// or const dataset = Bytes.MapPluto;
// or const dataset = Bytes.ZoningTaxLot;
// or const dataset = Bytes.PAD;
dataset.init().then(() => {
  console.log('Dataset ready.');
  const stream = dataset.stream();
  // do something with stream
}).catch((err) => {
  console.error(err);
});

dataset.stream([options])

The dataset's underlying data is accessible like any other standard node stream.

const stream = dataset.stream();
stream.on('readable', () => {
  const record = stream.read();
  // do something with the record
});
stream.on('end', () => {
  console.log('finished');
});

You can also use the stream in flowing mode by attaching a data event listener.

const stream = dataset.stream();
stream.on('data', (record) => {
  // do something with the record
});
stream.on('end', () => {
  console.log('finished');
});

Lastly, you can also pipe the stream like you would any other readable stream.

const stream = dataset.stream();
const writableStream = somehowGetWritableStream();
stream.pipe(writableStream);

options

• table - default: 'BOTH' - Which table ('BBL'|'ADR') to return (only applicable to PAD dataset)
• sanitize - default: true - Removes extra whitespaces. (only applicable to PAD dataset) Ex.

"EAST   45 STREET               "

becomes

"EAST 45 STREET"

Todo

• Add datasets - open an issue to suggest a dataset you'd like to see.